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*.xml
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<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<project id="f97e424a-ba19-4297-a4ff-05cdea3f0011" name="8086" version="1">
<files>
<filefolder id="c581f7a9-6dd9-40df-bf4a-bc4ebe8225cc" name="子模块">
<file relativepath="ALU.dlsche"/>
<file relativepath="CU.dlsche"/>
<file relativepath="PC.dlsche"/>
<file relativepath="uPC_NEXT.dlsche"/>
<file relativepath="BRANCH.dlsche"/>
<file relativepath="FLAG.dlsche"/>
<file relativepath="REGS.dlsche"/>
<file relativepath="rom.masm"/>
<file relativepath="rom.rxm"/>
<file relativepath="rom.bat"/>
</filefolder>
<file relativepath="8086.dlsche"/>
<file relativepath="README.md"/>
<file relativepath="8086.pdf"/>
</files>
</project>
8086.dlsche 0 → 100644
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8086.dlsche.svg 0 → 100644
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<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="3461" y="3670">A3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="3461" y="3700">A4</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="3461" y="3730">A5</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="3461" y="3760">A6</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="3461" y="3790">A7</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3545" y="3580">D0</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3545" y="3610">D1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3545" y="3670">D3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3545" y="3700">D4</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3545" y="3730">D5</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3545" y="3760">D6</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3545" y="3790">D7</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="3472" y="3849">^EN</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="3438" y="3530">MAR_gate</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="3428" y="3940">BUS_TRANS8</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="2971" y="3580">D0</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="2971" y="3610">D1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="2971" y="3640">D2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="2971" y="3670">D3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="2971" y="3700">D4</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="2971" y="3730">D5</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="2971" y="3760">D6</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3155" y="3580">Q0</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3155" y="3610">Q1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="3155" y="3670">Q3</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="60" font-weight="700" text-anchor="start" x="2978" y="3520">MAR</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="微软雅黑" font-size="65" font-weight="700" text-anchor="start" x="548" y="950">①CU模块的左侧是输入接口，其余的都是CU的输出接口</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="微软雅黑" font-size="65" font-weight="700" text-anchor="start" x="548" y="1070">②绿色的端口没有实际意义，只用于芯片管脚布局</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2438" y="5110">中断允许标志，当IF=1时，允许中断；当IF=0时，禁止中断</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1228" y="2030">进位标志</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1228" y="2130">溢出标志</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1228" y="2230">零标志</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="1228" y="2330">符号为正标志</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="2528" y="2430">指令转移信号</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="微软雅黑" font-size="65" font-weight="700" text-anchor="start" x="548" y="1200">③CU模块的输出作为其他模块的控制信号，名称相同的模块接口相连。</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1322" y="1109">U15</text>
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<path d="M1598 1250 C 1647 1250, 1670 1200, 1670 1200" fill="none" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1583" y="1135">U16</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1555" y="1298">OR3</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1470" y="1200">ZF</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="1470" y="1240">JL</text>
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<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="2380" x2="2320" y1="920" y2="920"/>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="2380" x2="2320" y1="970" y2="970"/>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="2380" x2="2320" y1="1000" y2="1000"/>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2389" y="1050">AND4</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="2420" y="1587">U8</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="微软雅黑" font-size="250" font-weight="700" text-anchor="start" x="830" y="310">转移指令模块</text>
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CU.dlsche 0 → 100644
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1637" y="688">D0</text>
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PC.dlsche 0 → 100644
浏览文件 @ 0646239b
添加文件
PC.dlsche.svg 0 → 100644
浏览文件 @ 0646239b
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1487" y="1745">D6</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1487" y="1775">D7</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1565">Q0</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1595">Q1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1625">Q2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1655">Q3</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1685">Q4</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1654" x2="1704" y1="1715" y2="1715"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1715">Q5</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1654" x2="1704" y1="1745" y2="1745"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1745">Q6</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1621" y="1775">Q7</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1529" y="1837">^CTEN</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1527" y="1895">^LOAD</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1517" y="1865">^U\D</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1654" x2="1704" y1="1835" y2="1835"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1601" y="1835">RCO</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1654" x2="1704" y1="1865" y2="1865"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1551" y="1865">MAX\MIN</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1454" x2="1404" y1="1925" y2="1925"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1507" y="1925">CLK</text>
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<polyline fill="none" points="1454 1915, 1464 1925, 1454 1935" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="5"/>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="65" font-weight="700" text-anchor="start" x="1504" y="1755">PC</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1496" y="2062">C_AB8</text>
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</svg>
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# 说明
这里实现了一个简化的 8086 微处理器，其已具备了基本的功能，完全可以满足基于 8086 处理器的`微机原理与接口技术`实验。但是，为了提高仿真效率，降低学习难度，与真实的 8086 微处理器相比，这里实现的 8086 进行了合理的简化，更多细节可参看下面的表格。
此外，需要说明的是，简化的 8086 微处理器与真实的 8086 微处理器在机器指令级别是不兼容的，也就是说将一个可以在真实 8086 上运行的可执行程序直接放到简化的 8086 上是无法运行的。但是它们的汇编语言语法和汇编指令是兼容的，也就是说，将一段为简化的 8086 编写的汇编程序源代码用真实 8086 的汇编器生成一个可执行程序后，是可以在真实的 8086 上运行的。
| 对比项目 | 真实的 8086 | 简化的 8086 |
| ------ | ---------- | ---------- |
| 数据线 | 16 根 | 8 根 |
| 地址线 | 20 根 | 8 根 |
|寄存器|段寄存器、通用寄存器、栈寄存器、标志寄存器等均为 16 位|只提供了 8 位的通用寄存器、栈寄存器、标志寄存器，没有提供段寄存器|
|寻址方式|段地址加偏移地址得到物理地址，最多可访问 1MB 物理内存|由于没有提供段寄存器，所以直接使用物理地址，最多可以访问 256B 物理内存|
|起始位置|加电复位后进入 Big Mode，从一个固定的 CS:IP 开始执行 ROM 中的 BIOS 程序|加电复位后 PC 寄存器初始化为 0x10，也就是从物理内存的 0x10 处的第一条指令开始执行|
|指令集|支持完整的 8086 指令集|只实现了 8086 指令集的一个子集|
| 中断向量表 | 从物理地址 0 开始的 1KB，可存放 256 个中断向量，每个占用 4 字节，存放了中断处理程序入口的段地址和偏移地址 | 从物理地址 0 开始的 16 字节，存放了 16 个中断向量，每个占用 1 字节，存放了中断处理程序入口的物理地址|
# Datasheet
[8086.pdf](8086.pdf)
# 原理图
![raw svg](8086.dlsche.svg)
\ No newline at end of file
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这个 源代码变更 因为 太大 而不能显示。 你可以 浏览blob 。
microasm.c 0 → 100644
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/*******************************************************************************
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
typedef unsigned char BYTE;
typedef long BOOL;
#define FALSE 0
#define TRUE 1
#define MAX_LINE_LENGTH 256 // 一行代码最多可以有多少个字符
#define MAX_LINE_COUNT 2048 // 源代码文件最多可以有多少行
#define MAX_SYMBOL_LENGTH 64 // 一个符号最多可以包含多少个字符
#define MAX_SYMBOL_COUNT 256 // 源代码文件中最多可以包含多少个符号
#ifndef MAX_PATH
#define MAX_PATH 256 // 文件路径最多可以包含多少了字符
#endif
// 代码行数据库。记录源代码文件中所有代码行的信息（包括注释行、空行）
struct LINE_RECORD
{
char line_string[MAX_LINE_LENGTH]; // 代码行的内容
unsigned long line_num; // 行号
unsigned long address; // 此行代码转换的机器码在映像文件中的地址（偏移）。注意，对于 DM1000 来说，微指令的一个地址对应 4 个字节。
int machine_code_count; // 此行代码转换的机器码的字节数量
unsigned long flag; // 代码行标志位，32位
};
struct LINE_RECORD line_database[MAX_LINE_COUNT] = { 0 };
int line_count = 0;
int machine_code_line_count = 0; // 记录产生了机器码的代码行的数量
// 在此定义所有的代码行标志位。注意，代码行标志位是按位或的关系。
#define LF_INSTRUCTION 0x00000001 // 代码行标志位的最低位是1，表示此行是一条指令，否则表示此行是数据
//
// 在下面定义所有的关键字
//
// 寄存器名称
const char* rs_register_keyword = "rs";
const char* rd_register_keyword = "rd";
const char* al_register_keyword = "al";
const char* dl_register_keyword = "dl";
const char* sp_register_keyword = "sp";
const char* es_register_keyword = "es";
const char* flag_register_keyword = "flag";
const char* mar_register_keyword = "mar";
const char* ir_register_keyword = "ir";
const char* a_register_keyword = "a";
const char* w_register_keyword = "w";
const char* pc_register_keyword = "pc";
const char* upc_register_keyword = "upc";
//
// alu 操作码
const char* alu_add_keyword = "alu_add";
const char* alu_adc_keyword = "alu_adc";
const char* alu_sub_keyword = "alu_sub";
const char* alu_sbb_keyword = "alu_sbb";
const char* alu_and_keyword = "alu_and";
const char* alu_or_keyword = "alu_or";
const char* alu_xor_keyword = "alu_xor";
const char* alu_inc_keyword = "alu_inc";
const char* alu_dec_keyword = "alu_dec";
const char* alu_shr_keyword = "alu_shr";
const char* alu_shl_keyword = "alu_shl";
const char* alu_rcr_keyword = "alu_rcr";
const char* alu_rcl_keyword = "alu_rcl";
const char* alu_sal_keyword = "alu_sal";
const char* alu_sar_keyword = "alu_sar";
const char* alu_rol_keyword = "alu_rol";
const char* alu_ror_keyword = "alu_ror";
const char* alu_not_keyword = "alu_not";
const char* al_flag_keyword = "al_flag";
const char* shift_flag_keyword = "shift_flag";
// 访问主存或外设的操作数
const char* pc_main_memory_keyword = "[pc]";
const char* jz_mar_keyword = "jz[mar]";
const char* jnz_mar_keyword = "jnz[mar]";
const char* jc_mar_keyword = "jc[mar]";
const char* ja_mar_keyword = "ja[mar]";
const char* jb_mar_keyword = "jb[mar]";
const char* jg_mar_keyword = "jg[mar]";
const char* jl_mar_keyword = "jl[mar]";
const char* jmp_mar_keyword = "jmp[mar]";
const char* mar_main_memory_keyword = "[mar]";
const char* mar_extern_IO_keyword = "<mar>";
const char* int_number_keyword = "inta";
const char* delimit_char = "\n\t\r "; // 需要忽略的空白字符
const char* delimit_char_comma = "\n\t\r, "; // 需要忽略的空白字符，包括英文逗号
// 单操作数微指令
struct ONE_OPERAND_INSTRUCTION_ENTRY
{
const char** op;
unsigned long micro_machine_code;
};
struct ONE_OPERAND_INSTRUCTION_ENTRY one_operand_table[] =
{
{ NULL, 0x0 } // 未用
,{ &pc_register_keyword, 0xfffffffd } // inc pc
,{ &upc_register_keyword, 0xffffffc3 } // reset upc
};
// 查表，操作数是否匹配。返回0，操作数不匹配；返回非0，操作数匹配，并且返回值就是操作数在表中的下标。
int match_one_operand(const char* op)
{
int i;
for (i = 1; i<sizeof(one_operand_table) / sizeof(one_operand_table[0]); i++)
{
if ((stricmp(op, *one_operand_table[i].op) == 0))
{
return i;
}
}
return 0;
}
// 双操作数微指令
struct PATH_INSTRUCTION_OPERAND_ENTRY
{
const char** op1;
const char** op2;
unsigned long micro_machine_code;
};
//////////////////////////////////////////////////////////////////////////
//
struct PATH_INSTRUCTION_OPERAND_ENTRY path_operand_table[] =
{
{ NULL, NULL, 0x0 } // 未用
,{ &pc_main_memory_keyword, &ir_register_keyword, 0xffef47ff } // path [pc], ir
,{ &pc_main_memory_keyword, &rd_register_keyword, 0xffe947ff } // path [pc], rd
,{ &pc_main_memory_keyword, &mar_register_keyword, 0xffe547ff } // path [pc], mar
,{ &pc_main_memory_keyword, &a_register_keyword, 0xffe147ff } // path [pc], a
,{ &pc_main_memory_keyword, &w_register_keyword, 0xffe347ff } // path [pc], w
,{ &jz_mar_keyword, &pc_register_keyword, 0xff1f86fd } // path jz[mar], pc
,{ &jnz_mar_keyword, &pc_register_keyword, 0xff3f86fd } // path jnz[mar], pc
,{ &jc_mar_keyword, &pc_register_keyword, 0xff5f86fd } // path jc[mar], pc
,{ &ja_mar_keyword, &pc_register_keyword, 0xff7f86fd } // path ja[mar], pc
,{ &jb_mar_keyword, &pc_register_keyword, 0xff9f86fd } // path jb[mar], pc
,{ &jg_mar_keyword, &pc_register_keyword, 0xffbf86fd } // path jg[mar], pc
,{ &jl_mar_keyword, &pc_register_keyword, 0xffdf86fd } // path jl[mar], pc
,{ &jmp_mar_keyword, &pc_register_keyword, 0xffff86fd } // path jmp[mar], pc
,{ &rs_register_keyword, &rd_register_keyword, 0xffe9c1ff } // path rs, rd
,{ &rs_register_keyword, &w_register_keyword, 0xffe3c1ff } // path rs, w
,{ &rs_register_keyword, &mar_register_keyword, 0xffe5c1ff } // path rs, mar
,{ &rd_register_keyword, &mar_register_keyword, 0xffe5c1bf } // path rd, mar
,{ &rs_register_keyword, &mar_main_memory_keyword, 0xffe781ff } // path rs, [mar]
,{ &rs_register_keyword, &mar_extern_IO_keyword, 0xffe781fe } // path rs, <mar>
,{ &int_number_keyword, &w_register_keyword, 0xffe3c7ce } // path inta, w
,{ &int_number_keyword, &mar_register_keyword, 0xffe5c7ce } // path inta, mar
,{ &flag_register_keyword, &mar_main_memory_keyword, 0xffe783ff } // path flag,[mar]
,{ &a_register_keyword, &mar_main_memory_keyword, 0xffe791ff } // path a, [mar]
,{ &pc_register_keyword, &mar_main_memory_keyword, 0xffe785ff } // path pc, [mar]
,{ &a_register_keyword, &pc_register_keyword, 0xffffd0ff } // path a, pc
,{ &rd_register_keyword, &a_register_keyword, 0xffe1c1bf } // path rd, a
,{ &rd_register_keyword, &w_register_keyword, 0xffe3c1bf } // path rd, w
,{ &pc_register_keyword, &a_register_keyword, 0xffe1c5ff } // path pc, a
,{ &pc_register_keyword, &mar_register_keyword, 0xffe5c5ff } // path pc, mar
,{ &es_register_keyword, &a_register_keyword, 0xffe1c1ff } // path es, a
,{ &sp_register_keyword, &a_register_keyword, 0xffe1c1bf } // path sp, a
,{ &sp_register_keyword, &w_register_keyword, 0xffe3c1bf } // path sp, w
,{ &sp_register_keyword, &mar_register_keyword, 0xffe5c1bf } // path sp, mar
,{ &mar_main_memory_keyword, &w_register_keyword, 0xffe387ff } // path [mar], w
,{ &mar_main_memory_keyword, &rd_register_keyword, 0xffe987ff } // path [mar], rd
,{ &mar_main_memory_keyword, &pc_register_keyword, 0xffff86ff } // path [mar], pc
,{ &mar_main_memory_keyword, &flag_register_keyword, 0xffeb87ff } // path [mar], flag
,{ &mar_extern_IO_keyword, &rd_register_keyword, 0xffe987fe } // path <mar>, rd
,{ &al_flag_keyword, &flag_register_keyword, 0xffebcbff } // path al_flag, flag
,{ &shift_flag_keyword, &flag_register_keyword, 0xffebd3ff } // path shift_flag, flag
,{ &alu_add_keyword, &rd_register_keyword, 0xd9e9d1ff } // path alu_add, rd
,{ &alu_sub_keyword, &rd_register_keyword, 0xd6e9d1ff } // path alu_sub, rd
,{ &alu_adc_keyword, &rd_register_keyword, 0xc9e9d1ff } // path alu_adc, rd
,{ &alu_sbb_keyword, &rd_register_keyword, 0xc6e9d1ff } // path alu_sbb, rd
,{ &alu_or_keyword, &rd_register_keyword, 0xfee9d1ff } // path alu_or, rd
,{ &alu_and_keyword, &rd_register_keyword, 0xfbe9d1ff } // path alu_and, rd
,{ &alu_xor_keyword, &rd_register_keyword, 0xf6e9d1ff } // path alu_xor, rd
,{ &alu_not_keyword, &rd_register_keyword, 0xf0e9d1ff } // path alu_not, rd
,{ &alu_inc_keyword, &rd_register_keyword, 0xd0e9d1ff } // path alu_inc, rd
,{ &alu_dec_keyword, &rd_register_keyword, 0xdfe9d1ff } // path alu_dec, rd
,{ &alu_sub_keyword, &a_register_keyword, 0xd6e1d1ff } // path alu_sub, a
,{ &alu_inc_keyword, &a_register_keyword, 0xd0e1d1ff } // path alu_inc, a
,{ &alu_add_keyword, &mar_register_keyword, 0xd9e5d1ff } // path alu_add, mar
,{ &alu_inc_keyword, &mar_register_keyword, 0xd0e5d1ff } // path alu_inc, mar
,{ &alu_dec_keyword, &sp_register_keyword, 0xdfe9d1ff } // path alu_dec, sp
,{ &alu_inc_keyword, &sp_register_keyword, 0xd0e9d1ff } // path alu_inc, sp
,{ &alu_shr_keyword, &rd_register_keyword, 0x3fe9c9ff } // path alu_shr, rd
,{ &alu_shl_keyword, &rd_register_keyword, 0x3fe8c9ff } // path alu_shl, rd
,{ &alu_rcr_keyword, &rd_register_keyword, 0xffe9c9ff } // path alu_rcr, rd
,{ &alu_rcl_keyword, &rd_register_keyword, 0xffe8c9ff } // path alu_rcl, rd
,{ &alu_sal_keyword, &rd_register_keyword, 0x7fe8c9ff } // path alu_sal, rd
,{ &alu_sar_keyword, &rd_register_keyword, 0x7fe9c9ff } // path alu_sar, rd
,{ &alu_rol_keyword, &rd_register_keyword, 0xbfe8c9ff } // path alu_rol, rd
,{ &alu_ror_keyword, &rd_register_keyword, 0xbfe9c9ff } // path alu_ror, rd
};
// 查表，判断两个操作数是否匹配。返回0，操作数不完全匹配；返回非0，操作数完全匹配，并且返回值就是操作数在表中的下标。
int match_ops(const char* op1, const char* op2)
{
int i;
for (i = 1; i<sizeof(path_operand_table) / sizeof(path_operand_table[0]); i++)
{
if ((stricmp(op1, *path_operand_table[i].op1) == 0)
&& (stricmp(op2, *path_operand_table[i].op2) == 0))
{
return i;
}
}
return 0;
}
// 汇编产生的机器码
#define MAX_MACHINE_CODE 1024
BYTE machine_code[MAX_MACHINE_CODE];
unsigned long machine_code_address = 0; // 一个地址对应一个字节
unsigned long machine_code_old_address = 0;
const char* micro_file_name = NULL; // 微指令文件路径
const char* target_file_name = NULL; // 目标文件路径
const char* list_file_name = NULL; // 列表文件路径
const char* dbg_file_name = NULL; // 调试信息文件路径
const unsigned long dbg_file_magic = 58;
const unsigned long dbg_file_version = 1;
// 输出汇编过程中发现的语法错误信息
void error_msg(const char* error_msg, int line_num)
{
if (line_num >= 1)
{
printf("%s:%d: error: %s\n", micro_file_name, line_num, error_msg);
}
else
{
printf("%s: error: %s\n", micro_file_name, error_msg);
}
exit(1);
}
char formated_msg[1024]; // 将格式化后的错误信息放在此字符串中。
void error_msg_miss_op(const char* instruction_name, int line_num)
{
sprintf(formated_msg, "%s 指令缺少操作数。", instruction_name);
error_msg(formated_msg, line_num);
}
void error_msg_wrong_op(const char* instruction_name, int line_num)
{
sprintf(formated_msg, "%s 指令不支持这样的操作数。", instruction_name);
error_msg(formated_msg, line_num);
}
// 定义关键字和解析函数的对应关系
typedef void(*PARSE_FUNCTION)(int line_num);
struct KEYWORD_FUNCTION_ENTRY
{
const char** keyword;
PARSE_FUNCTION parse_function;
};
// 指令名称
const char* fetch_instruction_keyword = "fetch";
const char* check_instruction_keyword = "check";
const char* hold_instruction_keyword = "hold";
const char* cli_instruction_keyword = "cli";
const char* sti_instruction_keyword = "sti";
const char* inta_instruction_keyword = "inta";
const char* dup_instruction_keyword = "dup";
const char* null_instruction_keyword = "null";
const char* path_instruction_keyword = "path";
const char* inc_instruction_keyword = "inc";
const char* reset_instruction_keyword = "reset"; // 复位
// 判断是否是立即数。不支持负数。
int is_immediate(const char* token)
{
return isdigit(token[0]);
}
// 根据立即数得到值。不支持负数。
unsigned long get_value_from_immediate(const char* immediate)
{
char* end;
int base = (immediate[0] == '0' && (immediate[1] == 'x' || immediate[1] == 'X')) ? 16 : 10;
return strtoul(immediate, &end, base);
}
// dup n, null
void parse_dup(int line_num)
{
char *op1, *op2;
int i;
unsigned long micro_instruction_count; // 微指令个数
unsigned long micro_code; // 微指令编码
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(dup_instruction_keyword, line_num);
}
// dup微指令的第一个操作数必须是立即数(十进制或十六进制)
if (!is_immediate(op1))
{
error_msg_wrong_op(dup_instruction_keyword, line_num);
}
// 得到微指令个数
micro_instruction_count = get_value_from_immediate(op1);
// 解析第二个操作数
if (is_immediate(op2))
{
micro_code = get_value_from_immediate(op2);
}
else if (0 == stricmp(op2, null_instruction_keyword))
{
micro_code = 0xffffffff;
}
else
{
error_msg_wrong_op(dup_instruction_keyword, line_num);
}
for (i = 0; i < (int)micro_instruction_count; i++)
{
memcpy(&machine_code[machine_code_address], &micro_code, 4);
machine_code_address += 4;
}
}
// fetch
void parse_fetch(int line_num)
{
unsigned long ul = 0xffff47c7;
memcpy(&machine_code[machine_code_address], &ul, 4);
machine_code_address += 4;
}
// check irq
void parse_check(int line_num)
{
unsigned long ul = 0xffffffcb;
memcpy(&machine_code[machine_code_address], &ul, 4);
machine_code_address += 4;
}
// hold DMA
void parse_hold(int line_num)
{
unsigned long ul = 0xffffd5db;
memcpy(&machine_code[machine_code_address], &ul, 4);
machine_code_address += 4;
}
// cli
void parse_cli(int line_num)
{
unsigned long ul = 0xffffffd3;
memcpy(&machine_code[machine_code_address], &ul, 4);
machine_code_address += 4;
}
// sti
void parse_sti(int line_num)
{
unsigned long ul = 0xffffffd7;
memcpy(&machine_code[machine_code_address], &ul, 4);
machine_code_address += 4;
}
// inta
void parse_inta(int line_num)
{
unsigned long ul = 0xffffffcf;
memcpy(&machine_code[machine_code_address], &ul, 4);
machine_code_address += 4;
}
// null
void parse_null(int line_num)
{
unsigned long ul = 0xffffffff;
memcpy(&machine_code[machine_code_address], &ul, 4);
machine_code_address += 4;
}
// path op1, op2
void parse_path(int line_num)
{
char *op1, *op2;
int index;
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(path_instruction_keyword, line_num);
}
index = match_ops(op1, op2);
if (0 == index)
{
error_msg_wrong_op(path_instruction_keyword, line_num);
}
memcpy(&machine_code[machine_code_address], &path_operand_table[index].micro_machine_code, 4);
machine_code_address += 4;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// inc
void parse_inc(int line_num)
{
char *op;
int index;
op = strtok(NULL, delimit_char_comma);
if (NULL == op)
{
error_msg_miss_op(inc_instruction_keyword, line_num);
}
index = match_one_operand(op);
if (0 == index)
{
error_msg_wrong_op(inc_instruction_keyword, line_num);
}
memcpy(&machine_code[machine_code_address], &one_operand_table[index].micro_machine_code, 4);
machine_code_address += 4;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// reset
void parse_reset(int line_num)
{
char *op;
int index;
op = strtok(NULL, delimit_char_comma);
if (NULL == op)
{
error_msg_miss_op(reset_instruction_keyword, line_num);
}
index = match_one_operand(op);
if (0 == index)
{
error_msg_wrong_op(reset_instruction_keyword, line_num);
}
memcpy(&machine_code[machine_code_address], &one_operand_table[index].micro_machine_code, 4);
machine_code_address += 4;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//
// 必须将关键字及其解析函数放在下面的表中。从而可以使用“表驱动”的编程模式。
//
struct KEYWORD_FUNCTION_ENTRY keyword_function_table[] =
{
{ NULL, NULL } // 未用
,{ &fetch_instruction_keyword, parse_fetch }
,{ &check_instruction_keyword, parse_check }
,{ &hold_instruction_keyword, parse_hold }
,{ &dup_instruction_keyword, parse_dup }
,{ &cli_instruction_keyword, parse_cli }
,{ &sti_instruction_keyword, parse_sti }
,{ &inta_instruction_keyword, parse_inta }
,{ &null_instruction_keyword, parse_null }
,{ &path_instruction_keyword, parse_path }
,{ &inc_instruction_keyword, parse_inc }
,{ &reset_instruction_keyword, parse_reset }
};
// 判断是否是一个关键字。返回0，不是关键字；返回非0，是关键字，并且返回值就是关键字在表中的下标。
int match_keyword(const char* token)
{
int i;
for (i = 1; i<sizeof(keyword_function_table) / sizeof(keyword_function_table[0]); i++)
{
if (stricmp(token, *keyword_function_table[i].keyword) == 0)
{
return i;
}
}
return 0;
}
// 输出版本信息
void version_msg()
{
printf(
"8086微指令汇编器 [版本 2.0]\n"
);
}
// 输出帮助信息
void help_msg()
{
printf(
"8086微指令汇编器。\n\n"
"用法:\n\n"
" microasm.exe micro_file_name [options]\n\n"
"选项:\n\n"
" -g debug_file_name\t指定生成的调试信息文件路径。\n"
" -h\t\t\t打印此帮助信息。\n"
" -l list_file_name\t指定生成的列表文件路径。\n"
" -o target_file_name\t指定生成的目标文件路径。若未指定，默认生成 micro.obj 文件。\n"
" -v\t\t\t打印版本信息。\n"
);
printf("\n");
version_msg();
exit(1);
}
void argument_error_msg()
{
printf("命令行参数错误。\n\n");
help_msg();
}
// 处理器用户输入的命令行参数
void process_argument(int argc, char* argv[])
{
int i;
// argv[0] 是 "easm.exe"，所以可以忽略。
for (i = 1; i<argc; i++)
{
if (strcmp(argv[i], "-v") == 0)
{
version_msg();
exit(1);
}
else if (strcmp(argv[i], "-h") == 0)
{
help_msg();
}
else if (strcmp(argv[i], "-o") == 0)
{
if (i + 1 < argc)
{
i++;
target_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
else if (strcmp(argv[i], "-l") == 0)
{
if (i + 1 < argc)
{
i++;
list_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
else if (strcmp(argv[i], "-g") == 0)
{
if (i + 1 < argc)
{
i++;
dbg_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
else if (NULL == micro_file_name && argv[i][0] != '-')
{
// 输入的汇编源代码文件路径。
micro_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
//
// 如果命令行参数中没有指定输入的汇编文件，就打印错误信息后退出
//
if (NULL == micro_file_name)
{
printf("命令行参数错误。没有指定微指令源代码文件的路径。\n");
help_msg();
}
}
// 将一个字符串写入二进制文件中。先将字符串长度写入文件，然后将字符串中的
// 每个字符依次写入文件，不包括字符串末尾的 0.
void write_string_to_binary_file(const char* str, FILE* fp)
{
int str_length;
if (str != NULL)
{
str_length = strlen(str);
fwrite(&str_length, 1, sizeof(str_length), fp);
fwrite(str, 1, str_length, fp);
}
else
{
str_length = 0;
fwrite(&str_length, 1, sizeof(str_length), fp);
}
}
int main(int argc, char* argv[])
{
FILE* fp;
char* token;
char line[MAX_LINE_LENGTH];
int i, j;
int line_num = 1; // 行号从第一行开始计数
int keyword_index;
unsigned long micro_code;
//
// 处理命令行参数
//
process_argument(argc, argv);
//
// 打开汇编源代码文件
//
fp = fopen(micro_file_name, "r");
if (NULL == fp)
{
printf("无法打开微指令源代码文件 %s\n", micro_file_name);
return 1;
}
////////////////////////////////////////////////////////////////////////////
//// 扫描
version_msg();
printf("\n正在汇编 %s...\n", micro_file_name);
//
// 一次读取一行文本，同时记录所有的代码行信息
//
while (fgets(line, sizeof(line), fp) != NULL)
{
//
// 将一行代码的信息记录到代码行数据库中
//
strcpy(line_database[line_count].line_string, line);
line_database[line_count].line_num = line_num;
line_database[line_count].address = machine_code_address;
//
// 将代码行中的注释剥离
//
line[strcspn(line, ";")] = 0;
//
// 开始解析代码行
//
token = strtok(line, delimit_char);
if (NULL == token)
{
// 如果是空行，不做任何处理
}
else if ((keyword_index = match_keyword(token)) != 0)
{
// 根据关键字进行相应的处理
keyword_function_table[keyword_index].parse_function(line_num);
}
else if (is_immediate(token))
{
// 将立即数直接作为微指令
micro_code = get_value_from_immediate(token);
memcpy(&machine_code[machine_code_address], &micro_code, 4);
machine_code_address += 4;
}
else
{
error_msg("无法识别的代码行。", line_num);
}
//
// 补充代码行数据库信息
//
line_database[line_count].machine_code_count = machine_code_address - machine_code_old_address;
machine_code_old_address = machine_code_address;
//
// 记录产生了机器码的代码行数量
//
if (line_database[line_count].machine_code_count != 0)
{
machine_code_line_count++;
}
//
// 增加行号
//
line_count++;
line_num++;
if (line_count == MAX_LINE_COUNT)
{
sprintf(formated_msg, "微指令文件中的代码行过多，最多只能有 %d 行代码。", MAX_LINE_COUNT);
error_msg(formated_msg, -1);
}
}
fclose(fp);
////////////////////////////////////////////////////////////////////////////
//// 产生各种输出文件
//
// 将机器码写入二进制文件
//
if (NULL == target_file_name)
{
target_file_name = "micro.obj";
}
fp = fopen(target_file_name, "wb");
if (NULL == fp)
{
printf("无法打开目标文件 %s\n", target_file_name);
return 1;
}
fwrite(machine_code, 1, machine_code_address, fp);
fclose(fp);
printf("\n生成目标文件 %s\n", target_file_name);
//
// 将代码行数据库中的信息写入列表文件
//
if (list_file_name != NULL)
{
fp = fopen(list_file_name, "w");
if (NULL == fp)
{
printf("无法打开列表文件 %s\n", list_file_name);
return 1;
}
for (i = 0; i<line_count; i++)
{
// 行号
fprintf(fp, "%04d ", line_database[i].line_num);
// 地址和机器码
if (line_database[i].machine_code_count > 0)
{
fprintf(fp, "%02X ", line_database[i].address);
for (j = 0; j<4; j++)
{
fprintf(fp, "%02X ", machine_code[line_database[i].address + j]);
}
fprintf(fp, " ");
}
else
{
fprintf(fp, " ");
}
// 源代码
fprintf(fp, line_database[i].line_string);
}
fclose(fp);
printf("生成列表文件 %s\n", list_file_name);
}
//
// 将代码行数据库中的信息写入二进制的调试信息文件。
//
// 调试信息的基本格式为：
// 魔数（4字节），固定不可改变
// 版本号（4字节），固定不可改变
// 源代码文件绝对路径字符串长度（4字节）
// 源代码文件绝对路径字符串（不包括字符串结尾的0）
// 列表文件绝对路径字符串长度（4字节）
// 列表文件绝对路径字符串（不包括字符串结尾的0）
//
// 代码行数据库中元素的数量（4字节）
// 代码行数据库中的所有元素
//
// 符号表元素的数量（4字节）
// 符号表中的所有元素
//
if (dbg_file_name != NULL)
{
fp = fopen(dbg_file_name, "wb");
if (NULL == fp)
{
printf("无法打开调试信息文件 %s\n", dbg_file_name);
return 1;
}
// 魔数
fwrite(&dbg_file_magic, 1, sizeof(dbg_file_magic), fp);
// 版本号
fwrite(&dbg_file_version, 1, sizeof(dbg_file_version), fp);
// 源代码文件路径
write_string_to_binary_file(micro_file_name, fp);
// 列表文件路径
write_string_to_binary_file(list_file_name, fp);
// 代码行数据库中的所有元素
fwrite(&machine_code_line_count, 1, sizeof(machine_code_line_count), fp);
for (i = 0; i<line_count; i++)
{
// 跳过没有产生机器码的代码行
if (0 == line_database[i].machine_code_count)
{
continue;
}
fwrite(&line_database[i].line_num, 1, sizeof(unsigned long), fp);
fwrite(&line_database[i].address, 1, sizeof(unsigned long), fp);
fwrite(&line_database[i].machine_code_count, 1, sizeof(int), fp);
fwrite(&line_database[i].flag, 1, sizeof(unsigned long), fp);
}
// 没有符号表。但是为了确保调试信息的格式能够被正确读取，必须写入符号表数量为 0
i = 0;
fwrite(&i, 1, sizeof(i), fp);
fclose(fp);
printf("生成调试信息文件 %s\n", dbg_file_name);
}
return 0;
}
microasm.exe 0 → 100644
浏览文件 @ 0646239b
添加文件
rom.bat 0 → 100644
浏览文件 @ 0646239b
@echo off
microasm.exe rom.masm -o rom.rxm -l rom.lst -g rom.dbg
pause
\ No newline at end of file
rom.dbg 0 → 100644
浏览文件 @ 0646239b
添加文件
rom.lst 0 → 100644
浏览文件 @ 0646239b
0001
0002
0003 ; 每一条汇编指令，即8086指令对应一段微程序，每一段微程序分配的空间总是8的倍数
0004 ; 若一条指令对应微指令的条数少于8的倍数，那么使用占位微指令填充
0005 ; 因此，所有指令的第一条微指令地址必须是8的倍数
0006 ; 取指微指令，所有指令的第一步均为取指操作，都要执行该条微指令
0007
0008
0009 ;===========================================================================
0010 ;0.取指指令
0011 00 C7 47 FF FF fetch instruction
0012 04 FF FF FF FF dup 7, null ; 7条占位微指令，本身没有意义，只起占位作用
0013
0014
0015 ;===========================================================================
0016 ;1.mov reg, imm 将立即数imm传送到寄存器reg中
0017 20 FD FF FF FF inc pc ; pc加1
0018 24 FF 47 EF FF path [pc], ir ; 将pc指定存储单元的字节传送到指令寄存器ir中
0019 28 FD FF FF FF inc pc
0020 2C FF 47 E9 FF path [pc], rd ; 将pc指定存储单元的字节传送到目的寄存器中，目的寄存器由指令寄存器ir中的低4位指定
0021 30 FD FF FF FF inc pc
0022
0023 34 CB FF FF FF check irq ; 查询8086的硬中断请求输入INTR，若INTR为高电平，表示有中断请求，
0024 ; 那么uPC转去执行固定的硬中断处理微程序，完成断点入栈并加载中断服务程序入口地址到PC，
0025 ; 运行中断服务程序
0026
0027 38 C3 FF FF FF reset upc ; 地址0传送到uPC寄存器输入端，下个时钟上升沿到来时，uPC写入0
0028 ; 微程序存储器ROM输出0地址处的微指令，即fetch instruction取指微指令，
0029 ; 在该微指令控制下，下个时钟上升沿到来时，取出PC指向的指令
0030
0031 3C FF FF FF FF dup 1, null
0032
0033
0034 ;===========================================================================
0035 ;2.mov rd， rs 将源寄存器rs的内容传送到目的寄存器rd中
0036 40 FD FF FF FF inc pc
0037 44 FF 47 EF FF path [pc], ir
0038
0039 48 FF C1 E9 FF path rs, rd ; 将rs的内容传送到rd中，指令寄存器ir中的低四位表示目的寄存器rd，
0040 ; 高四位表示源寄存器rs
0041
0042 4C FD FF FF FF inc pc
0043 50 CB FF FF FF check irq
0044 54 C3 FF FF FF reset upc
0045
0046 58 FF FF FF FF dup 2, null
0047
0048
0049 ;===========================================================================
0050 ;3.mov reg， symbol 将标号symbol指定存储单元的内容传送到寄存器中
0051 60 FD FF FF FF inc pc
0052 64 FF 47 EF FF path [pc], ir
0053 68 FD FF FF FF inc pc
0054 6C FF 47 E5 FF path [pc], mar ; 把pc指定单元的数据（源操作数地址symbol）传送到地址寄存器mar中
0055 70 FF 87 E9 FF path [mar], rd ; 把mar指定存储单元的数据传送到目的寄存器rd中
0056 74 FD FF FF FF inc pc
0057 78 CB FF FF FF check irq
0058 7C C3 FF FF FF reset upc
0059
0060
0061 ;===========================================================================
0062 ;4.mov rd, [rs] 将源地址寄存器rs指定存储单元的数据传送到目的寄存器rd中
0063 80 FD FF FF FF inc pc
0064 84 FF 47 EF FF path [pc], ir
0065 88 FF C1 E5 FF path rs, mar ; 将源寄存器rs保存的地址转移到地址寄存器mar中
0066 8C FF 87 E9 FF path [mar], rd
0067 90 FD FF FF FF inc pc
0068 94 CB FF FF FF check irq
0069 98 C3 FF FF FF reset upc
0070
0071 9C FF FF FF FF dup 1, null
0072
0073
0074 ;===========================================================================
0075 ;5.mov [rd], rs 将源寄存器rs的数据传送到目的地址寄存器rd指定的存储单元中
0076 A0 FD FF FF FF inc pc
0077 A4 FF 47 EF FF path [pc], ir
0078 A8 BF C1 E5 FF path rd, mar ; 将目的寄存器rd保存的地址转移到地址寄存器mar中
0079 AC FF 81 E7 FF path rs, [mar] ; 将源寄存器rs的数据传送到地址寄存器mar指定存储单元
0080 B0 FD FF FF FF inc pc
0081 B4 CB FF FF FF check irq
0082 B8 C3 FF FF FF reset upc
0083
0084 BC FF FF FF FF dup 1, null
0085
0086
0087 ;===========================================================================
0088 ;6.mov [rd], imm 将立即数传送到目的寄存器rd指定存储单元中
0089 C0 FD FF FF FF inc pc
0090 C4 FF 47 EF FF path [pc], ir
0091 C8 FD FF FF FF inc pc
0092 CC FF 47 E9 FF path [pc], rd
0093 D0 FD FF FF FF inc pc
0094 D4 CB FF FF FF check irq
0095 D8 C3 FF FF FF reset upc
0096
0097 DC FF FF FF FF dup 1, null
0098
0099
0100 ;===========================================================================
0101 ;7. mov symbol, rs 将源寄存器rs的数据传送到标号symbol指定存储单元中
0102 E0 FD FF FF FF inc pc
0103 E4 FF 47 EF FF path [pc], ir
0104 E8 FD FF FF FF inc pc
0105 EC FF 47 E5 FF path [pc], mar
0106 F0 FF 81 E7 FF path rs, [mar]
0107 F4 FD FF FF FF inc pc
0108 F8 CB FF FF FF check irq
0109 FC C3 FF FF FF reset upc
0110
0111
0112 ;===========================================================================
0113 ;8. add rd, rs 源寄存器rs与目的寄存器rd相加，无进位加法，结果写回rd中
0114 100 FD FF FF FF inc pc
0115 104 FF 47 EF FF path [pc], ir
0116 108 BF C1 E1 FF path rd, a ; 将目的寄存器rd的数据传送到累加器a中
0117 10C FF C1 E3 FF path rs, w ; 将源寄存器rs的数据传送到工作寄存器w中，
0118 ; a和w均为alu运算单元中的操作数寄存器
0119
0120 110 FF D1 E9 D9 path alu_add, rd ; 将累加器a与工作寄存器w相加的结果写回目的寄存器rd中
0121 114 FF CB EB FF path al_flag, flag ; 将运算标志位写入标志寄存器flag中
0122 118 FD FF FF FF inc pc
0123 11C CB FF FF FF check irq
0124 120 C3 FF FF FF reset upc
0125
0126 124 FF FF FF FF dup 7, null
0127
0128
0129 ;===========================================================================
0130 ;10. add rd, [rs] 源寄存器rs指定存储单元的数据与目的寄存器rd相加，结果写回rd中
0131 140 FD FF FF FF inc pc
0132 144 FF 47 EF FF path [pc], ir
0133 148 FF C1 E5 FF path rs, mar ; 把源寄存器rs的内容作为地址传送到mar中
0134 14C FF 87 E3 FF path [mar], w ; 将mar指定存储单元的数据传送到alu的工作寄存器w中
0135 150 BF C1 E1 FF path rd, a ; 把目的寄存器rd的数据传送到alu的累加器a中
0136 154 FF D1 E9 D9 path alu_add, rd
0137 158 FF CB EB FF path al_flag, flag
0138 15C FD FF FF FF inc pc
0139 160 CB FF FF FF check irq
0140 164 C3 FF FF FF reset upc
0141
0142 168 FF FF FF FF dup 6, null
0143
0144
0145 ;===========================================================================
0146 ;12. add rd, symbol 将标号symbol指定存储单元的数据传送到目的寄存器rd中
0147 180 FD FF FF FF inc pc
0148 184 FF 47 EF FF path [pc], ir
0149 188 FD FF FF FF inc pc
0150 18C FF 47 E5 FF path [pc], mar
0151 190 FF 87 E3 FF path [mar], w
0152 194 BF C1 E1 FF path rd, a
0153 198 FF D1 E9 D9 path alu_add, rd
0154 19C FF CB EB FF path al_flag, flag
0155 1A0 FD FF FF FF inc pc
0156 1A4 CB FF FF FF check irq
0157 1A8 C3 FF FF FF reset upc
0158
0159 1AC FF FF FF FF dup 5, null
0160
0161
0162 ;===========================================================================
0163 ;14. add rd, imm 将立即数imm传送到目的寄存器rd中
0164 1C0 FD FF FF FF inc pc
0165 1C4 FF 47 EF FF path [pc], ir
0166 1C8 FD FF FF FF inc pc
0167 1CC FF 47 E3 FF path [pc], w
0168 1D0 BF C1 E1 FF path rd, a
0169 1D4 FF D1 E9 D9 path alu_add, rd
0170 1D8 FF CB EB FF path al_flag, flag
0171 1DC FD FF FF FF inc pc
0172 1E0 CB FF FF FF check irq
0173 1E4 C3 FF FF FF reset upc
0174
0175 1E8 FF FF FF FF dup 6, null
0176
0177
0178 ;===========================================================================
0179 ;16. adc rd, rs rs与rd进行带进位的加法，结果写回目的寄存器rd中
0180 200 FD FF FF FF inc pc
0181 204 FF 47 EF FF path [pc], ir
0182 208 BF C1 E1 FF path rd, a
0183 20C FF C1 E3 FF path rs, w
0184 210 FF D1 E9 C9 path alu_adc, rd ; 将alu的累加器a与工作寄存器w进行无进位加法所得结果写回rd
0185 214 FF CB EB FF path al_flag, flag
0186 218 FD FF FF FF inc pc
0187 21C CB FF FF FF check irq
0188 220 C3 FF FF FF reset upc
0189
0190 224 FF FF FF FF dup 7, null
0191
0192
0193 ;===========================================================================
0194 ;18. adc rd, [rs]
0195 240 FD FF FF FF inc pc
0196 244 FF 47 EF FF path [pc], ir
0197 248 FF C1 E5 FF path rs, mar
0198 24C FF 87 E3 FF path [mar], w
0199 250 BF C1 E1 FF path rd, a
0200 254 FF D1 E9 C9 path alu_adc, rd
0201 258 FF CB EB FF path al_flag, flag
0202 25C FD FF FF FF inc pc
0203 260 CB FF FF FF check irq
0204 264 C3 FF FF FF reset upc
0205
0206 268 FF FF FF FF dup 6, null
0207
0208
0209 ;===========================================================================
0210 ;20. adc rd, symbol
0211 280 FD FF FF FF inc pc
0212 284 FF 47 EF FF path [pc], ir
0213 288 FD FF FF FF inc pc
0214 28C FF 47 E5 FF path [pc], mar
0215 290 FF 87 E3 FF path [mar], w
0216 294 BF C1 E1 FF path rd, a
0217 298 FF D1 E9 C9 path alu_adc, rd
0218 29C FF CB EB FF path al_flag, flag
0219 2A0 FD FF FF FF inc pc
0220 2A4 CB FF FF FF check irq
0221 2A8 C3 FF FF FF reset upc
0222
0223 2AC FF FF FF FF dup 5, null
0224
0225
0226 ;===========================================================================
0227 ;22. adc rd, imm
0228 2C0 FD FF FF FF inc pc
0229 2C4 FF 47 EF FF path [pc], ir
0230 2C8 FD FF FF FF inc pc
0231 2CC FF 47 E3 FF path [pc], w
0232 2D0 BF C1 E1 FF path rd, a
0233 2D4 FF D1 E9 C9 path alu_adc, rd
0234 2D8 FF CB EB FF path al_flag, flag
0235 2DC FD FF FF FF inc pc
0236 2E0 CB FF FF FF check irq
0237 2E4 C3 FF FF FF reset upc
0238
0239 2E8 FF FF FF FF dup 6, null
0240
0241
0242 ;===========================================================================
0243 ;24. sub rd, rs 将目的寄存器rd减去源寄存器rs，所得结果写回rd
0244 300 FD FF FF FF inc pc
0245 304 FF 47 EF FF path [pc], ir
0246 308 BF C1 E1 FF path rd, a
0247 30C FF C1 E3 FF path rs, w
0248 310 FF D1 E9 D6 path alu_sub, rd ; 无进位的减法，rd = rd - rs
0249 314 FF CB EB FF path al_flag, flag
0250 318 FD FF FF FF inc pc
0251 31C CB FF FF FF check irq
0252 320 C3 FF FF FF reset upc
0253
0254 324 FF FF FF FF dup 7, null
0255
0256
0257 ;===========================================================================
0258 ;26. sub rd, [rs]
0259 340 FD FF FF FF inc pc
0260 344 FF 47 EF FF path [pc], ir
0261 348 FF C1 E5 FF path rs, mar
0262 34C FF 87 E3 FF path [mar], w
0263 350 BF C1 E1 FF path rd, a
0264 354 FF D1 E9 D6 path alu_sub, rd
0265 358 FF CB EB FF path al_flag, flag
0266 35C FD FF FF FF inc pc
0267 360 CB FF FF FF check irq
0268 364 C3 FF FF FF reset upc
0269
0270 368 FF FF FF FF dup 6, null
0271
0272
0273 ;===========================================================================
0274 ;28. sub rd, symbol
0275 380 FD FF FF FF inc pc
0276 384 FF 47 EF FF path [pc], ir
0277 388 FD FF FF FF inc pc
0278 38C FF 47 E5 FF path [pc], mar
0279 390 FF 87 E3 FF path [mar], w ; 将mar指定存储单元的数据传送到alu的工作寄存器w中
0280 394 BF C1 E1 FF path rd, a
0281 398 FF D1 E9 D6 path alu_sub, rd
0282 39C FF CB EB FF path al_flag, flag
0283 3A0 FD FF FF FF inc pc
0284 3A4 CB FF FF FF check irq
0285 3A8 C3 FF FF FF reset upc
0286
0287 3AC FF FF FF FF dup 5, null
0288
0289
0290 ;===========================================================================
0291 ;30. sub rd, imm
0292 3C0 FD FF FF FF inc pc
0293 3C4 FF 47 EF FF path [pc], ir
0294 3C8 FD FF FF FF inc pc
0295 3CC FF 47 E3 FF path [pc], w
0296 3D0 BF C1 E1 FF path rd, a
0297 3D4 FF D1 E9 D6 path alu_sub, rd
0298 3D8 FF CB EB FF path al_flag, flag
0299 3DC FD FF FF FF inc pc
0300 3E0 CB FF FF FF check irq
0301 3E4 C3 FF FF FF reset upc
0302
0303 3E8 FF FF FF FF dup 6, null
0304
0305
0306 ;===========================================================================
0307 ;32. sbb rd, rs 带进位的减法
0308 400 FD FF FF FF inc pc
0309 404 FF 47 EF FF path [pc], ir
0310 408 BF C1 E1 FF path rd, a
0311 40C FF C1 E3 FF path rs, w
0312
0313 410 FF D1 E9 C6 path alu_sbb, rd ; alu中的累加器a减去工作寄存器w，再减去低位的借位，
0314 ; 所得结果写回目的寄存器rd中
0315 414 FF CB EB FF path al_flag, flag
0316 418 FD FF FF FF inc pc
0317 41C CB FF FF FF check irq
0318 420 C3 FF FF FF reset upc
0319
0320 424 FF FF FF FF dup 7, null
0321
0322
0323 ;===========================================================================
0324 ;34. sbb rd, [rs]
0325 440 FD FF FF FF inc pc
0326 444 FF 47 EF FF path [pc], ir
0327 448 FF C1 E5 FF path rs, mar
0328 44C FF 87 E3 FF path [mar], w
0329 450 BF C1 E1 FF path rd, a
0330 454 FF D1 E9 C6 path alu_sbb, rd
0331 458 FF CB EB FF path al_flag, flag
0332 45C FD FF FF FF inc pc
0333 460 CB FF FF FF check irq
0334 464 C3 FF FF FF reset upc
0335
0336 468 FF FF FF FF dup 6, null
0337
0338
0339 ;===========================================================================
0340 ;36. sbb rd, symbol
0341 480 FD FF FF FF inc pc
0342 484 FF 47 EF FF path [pc], ir
0343 488 FD FF FF FF inc pc
0344 48C FF 47 E5 FF path [pc], mar
0345 490 FF 87 E3 FF path [mar], w
0346 494 BF C1 E1 FF path rd, a
0347 498 FF D1 E9 C6 path alu_sbb, rd
0348 49C FF CB EB FF path al_flag, flag
0349 4A0 FD FF FF FF inc pc
0350 4A4 CB FF FF FF check irq
0351 4A8 C3 FF FF FF reset upc
0352
0353 4AC FF FF FF FF dup 5, null
0354
0355
0356 ;===========================================================================
0357 ;38. sbb a, imm
0358 4C0 FD FF FF FF inc pc
0359 4C4 FF 47 EF FF path [pc], ir
0360 4C8 FD FF FF FF inc pc
0361 4CC FF 47 E3 FF path [pc], w
0362 4D0 BF C1 E1 FF path rd, a
0363 4D4 FF D1 E9 C6 path alu_sbb, rd
0364 4D8 FF CB EB FF path al_flag, flag
0365 4DC FD FF FF FF inc pc
0366 4E0 CB FF FF FF check irq
0367 4E4 C3 FF FF FF reset upc
0368
0369 4E8 FF FF FF FF dup 6, null
0370
0371
0372 ;===========================================================================
0373 ;40.空指令
0374 500 FF FF FF FF dup 8, null
0375
0376 ;41.空指令
0377 520 FF FF FF FF dup 8, null
0378
0379
0380 ;===========================================================================
0381 ;42. and rd, rs
0382 540 FD FF FF FF inc pc
0383 544 FF 47 EF FF path [pc], ir
0384 548 BF C1 E1 FF path rd, a
0385 54C FF C1 E3 FF path rs, w
0386 550 FF D1 E9 FB path alu_and, rd ; alu中的累加器a与工作寄存器w进行按位与运算，结果写回rd中
0387 554 FF CB EB FF path al_flag, flag
0388 558 FD FF FF FF inc pc
0389 55C CB FF FF FF check irq
0390 560 C3 FF FF FF reset upc
0391
0392 564 FF FF FF FF dup 7, null
0393
0394
0395 ;===========================================================================
0396 ;44. and rd, [rs]
0397 580 FD FF FF FF inc pc
0398 584 FF 47 EF FF path [pc], ir
0399 588 FF C1 E5 FF path rs, mar
0400 58C FF 87 E3 FF path [mar], w
0401 590 BF C1 E1 FF path rd, a
0402 594 FF D1 E9 FB path alu_and, rd
0403 598 FF CB EB FF path al_flag, flag
0404 59C FD FF FF FF inc pc
0405 5A0 CB FF FF FF check irq
0406 5A4 C3 FF FF FF reset upc
0407
0408 5A8 FF FF FF FF dup 6, null
0409
0410
0411 ;===========================================================================
0412 ;46. and rd, symbol
0413 5C0 FD FF FF FF inc pc
0414 5C4 FF 47 EF FF path [pc], ir
0415 5C8 FD FF FF FF inc pc
0416 5CC FF 47 E5 FF path [pc], mar
0417 5D0 FF 87 E3 FF path [mar], w
0418 5D4 BF C1 E1 FF path rd, a
0419 5D8 FF D1 E9 FB path alu_and, rd
0420 5DC FF CB EB FF path al_flag, flag
0421 5E0 FD FF FF FF inc pc
0422 5E4 CB FF FF FF check irq
0423 5E8 C3 FF FF FF reset upc
0424
0425 5EC FF FF FF FF dup 5, null
0426
0427
0428 ;===========================================================================
0429 ;48. and rd, imm
0430 600 FD FF FF FF inc pc
0431 604 FF 47 EF FF path [pc], ir
0432 608 FD FF FF FF inc pc
0433 60C FF 47 E3 FF path [pc], w
0434 610 BF C1 E1 FF path rd, a
0435 614 FF D1 E9 FB path alu_and, rd
0436 618 FF CB EB FF path al_flag, flag
0437 61C FD FF FF FF inc pc
0438 620 CB FF FF FF check irq
0439 624 C3 FF FF FF reset upc
0440
0441 628 FF FF FF FF dup 6, null
0442
0443
0444 ;===========================================================================
0445 ;50. or rd, rs
0446 640 FD FF FF FF inc pc
0447 644 FF 47 EF FF path [pc], ir
0448 648 BF C1 E1 FF path rd, a
0449 64C FF C1 E3 FF path rs, w
0450 650 FF D1 E9 FE path alu_or, rd ; 将alu中的累加器a与工作寄存器w进行按位或运算，结果写回rd中
0451 654 FF CB EB FF path al_flag, flag
0452 658 FD FF FF FF inc pc
0453 65C CB FF FF FF check irq
0454 660 C3 FF FF FF reset upc
0455
0456 664 FF FF FF FF dup 7, null
0457
0458
0459 ;===========================================================================
0460 ;52. or rd, [rs]
0461 680 FD FF FF FF inc pc
0462 684 FF 47 EF FF path [pc], ir
0463 688 FF C1 E5 FF path rs, mar
0464 68C FF 87 E3 FF path [mar], w
0465 690 BF C1 E1 FF path rd, a
0466 694 FF D1 E9 FE path alu_or, rd
0467 698 FF CB EB FF path al_flag, flag
0468 69C FD FF FF FF inc pc
0469 6A0 CB FF FF FF check irq
0470 6A4 C3 FF FF FF reset upc
0471
0472 6A8 FF FF FF FF dup 6, null
0473
0474
0475 ;===========================================================================
0476 ;54. or rd, symbol
0477 6C0 FD FF FF FF inc pc
0478 6C4 FF 47 EF FF path [pc], ir
0479 6C8 FD FF FF FF inc pc
0480 6CC FF 47 E5 FF path [pc], mar
0481 6D0 FF 87 E3 FF path [mar], w
0482 6D4 BF C1 E1 FF path rd, a
0483 6D8 FF D1 E9 FE path alu_or, rd
0484 6DC FF CB EB FF path al_flag, flag
0485 6E0 FD FF FF FF inc pc
0486 6E4 CB FF FF FF check irq
0487 6E8 C3 FF FF FF reset upc
0488
0489 6EC FF FF FF FF dup 5, null
0490
0491
0492 ;===========================================================================
0493 ;56. or rd, imm
0494 700 FD FF FF FF inc pc
0495 704 FF 47 EF FF path [pc], ir
0496 708 FD FF FF FF inc pc
0497 70C FF 47 E3 FF path [pc], w
0498 710 BF C1 E1 FF path rd, a
0499 714 FF D1 E9 FE path alu_or, rd
0500 718 FF CB EB FF path al_flag, flag
0501 71C FD FF FF FF inc pc
0502 720 CB FF FF FF check irq
0503 724 C3 FF FF FF reset upc
0504
0505 728 FF FF FF FF dup 6, null
0506
0507
0508 ;===========================================================================
0509 ;58. xor rd, rs rs与rd进行异或运算，结果写回rd
0510 740 FD FF FF FF inc pc
0511 744 FF 47 EF FF path [pc], ir
0512 748 BF C1 E1 FF path rd, a
0513 74C FF C1 E3 FF path rs, w
0514 750 FF D1 E9 F6 path alu_xor, rd ; 将累加器a与工作寄存器w进行按位异或运算的结果写回rd
0515 754 FF CB EB FF path al_flag, flag
0516 758 FD FF FF FF inc pc
0517 75C CB FF FF FF check irq
0518 760 C3 FF FF FF reset upc
0519
0520 764 FF FF FF FF dup 7, null
0521
0522
0523 ;===========================================================================
0524 ;60. xor rd, [reg]
0525 780 FD FF FF FF inc pc
0526 784 FF 47 EF FF path [pc], ir
0527 788 FF C1 E5 FF path rs, mar
0528 78C FF 87 E3 FF path [mar], w
0529 790 BF C1 E1 FF path rd, a
0530 794 FF D1 E9 F6 path alu_xor, rd
0531 798 FF CB EB FF path al_flag, flag
0532 79C FD FF FF FF inc pc
0533 7A0 CB FF FF FF check irq
0534 7A4 C3 FF FF FF reset upc
0535
0536 7A8 FF FF FF FF dup 6, null
0537
0538
0539 ;===========================================================================
0540 ;62. xor rd, symbol
0541 7C0 FD FF FF FF inc pc
0542 7C4 FF 47 EF FF path [pc], ir
0543 7C8 FD FF FF FF inc pc
0544 7CC FF 47 E5 FF path [pc], mar
0545 7D0 FF 87 E3 FF path [mar], w
0546 7D4 BF C1 E1 FF path rd, a
0547 7D8 FF D1 E9 F6 path alu_xor, rd
0548 7DC FF CB EB FF path al_flag, flag
0549 7E0 FD FF FF FF inc pc
0550 7E4 CB FF FF FF check irq
0551 7E8 C3 FF FF FF reset upc
0552
0553 7EC FF FF FF FF dup 5, null
0554
0555
0556 ;===========================================================================
0557 ;64. xor rd, imm
0558 800 FD FF FF FF inc pc
0559 804 FF 47 EF FF path [pc], ir
0560 808 FD FF FF FF inc pc
0561 80C FF 47 E3 FF path [pc], w
0562 810 BF C1 E1 FF path rd, a
0563 814 FF D1 E9 F6 path alu_xor, rd
0564 818 FF CB EB FF path al_flag, flag
0565 81C FD FF FF FF inc pc
0566 820 CB FF FF FF check irq
0567 824 C3 FF FF FF reset upc
0568
0569 828 FF FF FF FF dup 6, null
0570
0571
0572 ;===========================================================================
0573 ;66. push rs 将rs寄存器的内容入栈保存
0574 ; 更新栈顶
0575 840 BF C1 E1 FF path sp, a ; 将栈寄存器sp传送到累加器a中
0576 844 FF D1 E9 DF path alu_dec, sp ; sp = sp -1，入栈时，sp做减法，向低地址空间生长
0577
0578 ; 入栈
0579 848 BF C1 E5 FF path sp, mar ; 把新的栈指针sp传送到地址寄存器mar中
0580 84C FF 81 E7 FF path rs, [mar] ; 把rs寄存器的内容传送到mar指定存储单元，完成入栈保存
0581 850 FD FF FF FF inc pc
0582 854 CB FF FF FF check irq
0583 858 C3 FF FF FF reset upc
0584
0585 85C FF FF FF FF dup 1, null
0586
0587
0588 ;===========================================================================
0589 ;67. pop rd 将栈寄存器sp指定存储单元内容出栈，并写入目的寄存器rd中
0590 ; 出栈
0591 860 BF C1 E5 FF path sp, mar ; 把栈寄存器sp传送到地址寄存器mar中
0592 864 FF 87 E9 FF path [mar], rd ; 把mar指定存储单元内容传送到目的寄存器rd中，完成出栈
0593
0594 ; 出栈后需要更新栈顶
0595 868 BF C1 E1 FF path sp, a ; 把sp传送到a
0596 86C FF D1 E9 D0 path alu_inc, sp ; 出栈时，栈顶向高地址空间生长，因此将sp加1
0597 870 FD FF FF FF inc pc
0598 874 CB FF FF FF check irq
0599 878 C3 FF FF FF reset upc
0600
0601 87C FF FF FF FF dup 1, null
0602
0603
0604 ;===========================================================================
0605 ;68. not reg 按位取反运算，reg既是源操作数也是目的操作数
0606 880 FD FF FF FF inc pc
0607 884 FF 47 EF FF path [pc], ir
0608 888 BF C1 E1 FF path rd, a ; 把reg作为源操作数传送到a中
0609 88C FF D1 E9 F0 path alu_not, rd ; 将a取反运算的结果写回目的寄存器rd
0610 890 FF CB EB FF path al_flag, flag
0611 894 FD FF FF FF inc pc
0612 898 CB FF FF FF check irq
0613 89C C3 FF FF FF reset upc
0614
0615
0616 ;===========================================================================
0617 ; test指令主要影响ZF标志
0618 ;69. test reg, imm
0619 8A0 FD FF FF FF inc pc
0620 8A4 FF 47 EF FF path [pc], ir
0621 8A8 BF C1 E1 FF path rd, a
0622 8AC FD FF FF FF inc pc
0623 8B0 FF 47 E3 FF path [pc], w
0624 8B4 FF CB EB FF path al_flag, flag
0625 8B8 FD FF FF FF inc pc
0626 8BC CB FF FF FF check irq
0627 8C0 C3 FF FF FF reset upc
0628
0629 8C4 FF FF FF FF dup 7, null
0630
0631
0632 ;===========================================================================
0633 ;71. cmp reg, immediate 比较寄存器reg与立即数的大小，修改标志寄存器
0634 8E0 FD FF FF FF inc pc
0635 8E4 FF 47 EF FF path [pc], ir
0636 8E8 BF C1 E1 FF path rd, a ; 把比较寄存器的内容传送到累加器a中
0637 8EC FD FF FF FF inc pc ; PC加1，指向立即数字节
0638 8F0 FF 47 E3 FF path [pc], w ; 把立即数传送到工作寄存器w中
0639 8F4 FF D1 E1 D6 path alu_sub, a ; 寄存器减去立即数的结果写回a中
0640 8F8 FF CB EB FF path al_flag, flag ; 把相减后的标志写入标志寄存器中
0641 8FC FD FF FF FF inc pc
0642 900 DB D5 FF FF hold DMA ; 查询DMA请求，若有DMA请求，则停止运行，cpu让出总线给8237控制器使用
0643 ; DMA传送结束后，从该处继续运行微程序
0644 904 CB FF FF FF check irq
0645 908 C3 FF FF FF reset upc
0646
0647 90C FF FF FF FF dup 5, null
0648
0649
0650 ;===========================================================================
0651 ;73. cmp reg, reg
0652 920 FD FF FF FF inc pc
0653 924 FF 47 EF FF path [pc], ir
0654 928 BF C1 E1 FF path rd, a
0655 92C FF C1 E3 FF path rs, w
0656 930 FF D1 E1 D6 path alu_sub, a
0657 934 FF CB EB FF path al_flag, flag
0658 938 FD FF FF FF inc pc
0659 93C CB FF FF FF check irq
0660 940 C3 FF FF FF reset upc
0661
0662 944 FF FF FF FF dup 7, null
0663
0664
0665 ;===========================================================================
0666 ;75. in al, imm 把立即数imm指定的外设端口数据读入cpu内部寄存器al中
0667 960 FD FF FF FF inc pc
0668 964 FF 47 EF FF path [pc], ir
0669 968 FD FF FF FF inc pc
0670 96C FF 47 E5 FF path [pc], mar
0671 970 FE 87 E9 FF path <mar>, rd ; 把mar指定的外设端口寄存器的数据传送到目的寄存器rd中
0672 974 FD FF FF FF inc pc
0673 978 C3 FF FF FF reset upc
0674
0675 97C FF FF FF FF dup 1, null
0676
0677
0678 ;===========================================================================
0679 ;76. in al, dl
0680 980 FD FF FF FF inc pc
0681 984 FF 47 EF FF path [pc], ir
0682 988 FF C1 E5 FF path rs, mar
0683 98C FE 87 E9 FF path <mar>, rd
0684 990 FD FF FF FF inc pc
0685 994 C3 FF FF FF reset upc
0686
0687 998 FF FF FF FF dup 2, null
0688
0689
0690 ;===========================================================================
0691 ;77. out dl, al
0692 9A0 FD FF FF FF inc pc
0693 9A4 FF 47 EF FF path [pc], ir
0694 9A8 BF C1 E5 FF path rd, mar
0695 9AC FE 81 E7 FF path rs, <mar>
0696 9B0 FD FF FF FF inc pc
0697 9B4 C3 FF FF FF reset upc
0698
0699 9B8 FF FF FF FF dup 2, null
0700
0701
0702 ;===========================================================================
0703 ;78. out imm, al 把al的数据传送到imm指定的外设端口
0704 9C0 FD FF FF FF inc pc
0705 9C4 FF 47 EF FF path [pc], ir
0706 9C8 FD FF FF FF inc pc
0707 9CC FF 47 E5 FF path [pc], mar
0708 9D0 FE 81 E7 FF path rs, <mar> ; 把源寄存器rs的内容传送到mar指定的外设端口
0709 9D4 FD FF FF FF inc pc
0710 9D8 C3 FF FF FF reset upc
0711
0712 9DC FF FF FF FF dup 1, null
0713
0714
0715 ;===========================================================================
0716 ;79. lea rd, symbol 把标号symbol表示的地址传送到寄存器rd中
0717 9E0 FD FF FF FF inc pc
0718 9E4 FF 47 EF FF path [pc], ir
0719 9E8 FD FF FF FF inc pc
0720 9EC FF 47 E9 FF path [pc], rd
0721 9F0 FD FF FF FF inc pc
0722 9F4 CB FF FF FF check irq
0723 9F8 C3 FF FF FF reset upc
0724
0725 9FC FF FF FF FF dup 1, null
0726
0727
0728 ;=====================================================================
0729 ;80. ja symbol
0730 A00 CB FF FF FF check irq
0731 A04 FD FF FF FF inc pc
0732 A08 FF C5 E5 FF path pc, mar ;将PC值传送到地址寄存器mar中
0733
0734 ;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
0735 ;若转移条件不成立，则PC加1，指向下一条指令
0736 A0C FD 86 7F FF path ja[mar], pc
0737 A10 C3 FF FF FF reset upc
0738
0739 A14 FF FF FF FF dup 3, null
0740
0741 ;=====================================================================
0742 ;81. jb symbol
0743 A20 CB FF FF FF check irq
0744 A24 FD FF FF FF inc pc
0745 A28 FF C5 E5 FF path pc, mar
0746
0747 ;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
0748 ;若转移条件不成立，则PC加1，指向下一条指令
0749 A2C FD 86 9F FF path jb[mar], pc
0750 A30 C3 FF FF FF reset upc
0751
0752 A34 FF FF FF FF dup 3, null
0753
0754 ;=====================================================================
0755 ;82. jg symbol
0756 A40 CB FF FF FF check irq
0757 A44 FD FF FF FF inc pc
0758 A48 FF C5 E5 FF path pc, mar
0759
0760 ;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
0761 ;若转移条件不成立，则PC加1，指向下一条指令
0762 A4C FD 86 BF FF path jg[mar], pc
0763 A50 C3 FF FF FF reset upc
0764
0765 A54 FF FF FF FF dup 3, null
0766
0767 ;=====================================================================
0768 ;83. jl symbol
0769 A60 CB FF FF FF check irq
0770 A64 FD FF FF FF inc pc
0771 A68 FF C5 E5 FF path pc, mar
0772
0773 ;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
0774 ;若转移条件不成立，则PC加1，指向下一条指令
0775 A6C FD 86 DF FF path jl[mar], pc
0776 A70 C3 FF FF FF reset upc
0777
0778 A74 FF FF FF FF dup 3, null
0779
0780 ;=====================================================================
0781 ;84. je symbol
0782 A80 CB FF FF FF check irq
0783 A84 FD FF FF FF inc pc
0784 A88 FF C5 E5 FF path pc, mar
0785
0786 ;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
0787 ;若转移条件不成立，则PC加1，指向下一条指令
0788 A8C FD 86 1F FF path jz[mar], pc
0789 A90 C3 FF FF FF reset upc
0790
0791 A94 FF FF FF FF dup 3, null
0792
0793 ;=====================================================================
0794 ;85. jne symbol
0795 AA0 CB FF FF FF check irq
0796 AA4 FD FF FF FF inc pc
0797 AA8 FF C5 E5 FF path pc, mar
0798
0799 ;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
0800 ;若转移条件不成立，则PC加1，指向下一条指令
0801 AAC FD 86 3F FF path jnz[mar], pc
0802 AB0 C3 FF FF FF reset upc
0803
0804 AB4 FF FF FF FF dup 3, null
0805
0806 ;=====================================================================
0807 ;86. jc symbol
0808 AC0 CB FF FF FF check irq
0809 AC4 FD FF FF FF inc pc
0810 AC8 FF C5 E5 FF path pc, mar
0811
0812 ;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
0813 ;若转移条件不成立，则PC加1，指向下一条指令
0814 ACC FD 86 5F FF path jc[mar], pc
0815 AD0 C3 FF FF FF reset upc
0816
0817 AD4 FF FF FF FF dup 3, null
0818
0819 ;=====================================================================
0820 ;87. jmp symbol
0821 AE0 CB FF FF FF check irq
0822 AE4 FD FF FF FF inc pc
0823 AE8 FF C5 E5 FF path pc, mar
0824
0825 ;将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中，无条件跳转
0826 AEC FD 86 FF FF path jmp[mar], pc
0827 AF0 C3 FF FF FF reset upc
0828
0829 AF4 FF FF FF FF dup 3, null
0830
0831 ;=====================================================================
0832 ;88. loop symbol 将cl作为目的操作数减1，改变零标志，若zf = 1，则跳转
0833 B00 FD FF FF FF inc pc
0834 B04 FF 47 EF FF path [pc], ir
0835 B08 BF C1 E1 FF path rd, a
0836 B0C FF D1 E9 DF path alu_dec, rd
0837 B10 FF CB EB FF path al_flag, flag
0838 B14 FD FF FF FF inc pc
0839 B18 FF C5 E5 FF path pc, mar
0840 B1C FD 86 FF FF path jmp[mar], pc
0841 B20 CB FF FF FF check irq
0842 B24 C3 FF FF FF reset upc
0843
0844 B28 FF FF FF FF dup 6, null
0845
0846 ;====================================================================================================
0847
0848 ; 软中断，首先将标志寄存器入栈，清除中断标志IF，并将当前程序断点的地址入栈保护，从
0849 ; 中断向量表中获取中断入口地址，CPU转向中断入口地址去执行相应的中断服务程序。
0850 ; 中断向量表段地址保存在ES寄存器中
0851 ;90. int immediate
0852 ; 将标志寄存器入栈
0853 B40 FD FF FF FF inc pc
0854 B44 FF 47 EF FF path [pc], ir
0855 B48 BF C1 E1 FF path sp, a
0856 B4C BF C1 E3 FF path sp, w
0857 B50 FF D1 E9 DF path alu_dec, sp
0858 B54 BF C1 E5 FF path sp, mar
0859 B58 FF 83 E7 FF path flag, [mar]
0860
0861 ; 更新栈顶
0862 B5C BF C1 E1 FF path sp, a
0863 B60 BF C1 E3 FF path sp, w
0864 B64 FF D1 E9 DF path alu_dec, sp
0865
0866 ; 计算中断服务程序入口地址
0867 B68 FD FF FF FF inc pc
0868 B6C FF 47 E5 FF path [pc], mar
0869
0870 B70 FD FF FF FF inc pc ;下一条指令地址（中断返回地址）暂存到a
0871 B74 FF C5 E1 FF path pc, a
0872
0873 ; 将中断服务程序入口地址置入pc，准备执行服务程序
0874 B78 FF 86 FF FF path [mar], pc
0875
0876 ; 将a中的返回地址入栈
0877 B7C BF C1 E5 FF path sp, mar
0878 B80 FF 91 E7 FF path a, [mar]
0879 B84 C3 FF FF FF reset upc
0880
0881 B88 FF FF FF FF dup 6, null
0882
0883
0884
0885 ;====================================================================================================
0886 ; 中断返回指令，执行出栈操作，后进先出
0887 ;93. iret
0888 BA0 FD FF FF FF inc pc
0889 BA4 FF 47 EF FF path [pc], ir
0890
0891 ; 恢复中断返回地址，即中断返回地址出栈
0892 BA8 BF C1 E5 FF path sp, mar
0893 BAC FF 86 FF FF path [mar], pc
0894
0895 ; 出栈后栈顶指针寄存器sp加1，指向先于返回地址入栈的对象
0896 BB0 BF C1 E1 FF path sp, a
0897 BB4 FF D1 E9 D0 path alu_inc, sp
0898
0899 ; 恢复标志寄存器内容，即标志寄存器FLAG出栈
0900 BB8 BF C1 E5 FF path sp, mar
0901 BBC FF 87 EB FF path [mar], flag
0902
0903 ; 出栈后栈顶指针寄存器sp加1，指向先于标志寄存器入栈的对象
0904 BC0 BF C1 E1 FF path sp, a
0905 BC4 FF D1 E9 D0 path alu_inc, sp
0906
0907 ; 查询中断请求，若存在，则继续处理中断
0908 BC8 CB FF FF FF check irq
0909 BCC C3 FF FF FF reset upc
0910
0911 BD0 FF FF FF FF dup 4, null
0912
0913
0914 ;====================================================================================================
0915
0916 ;95. sal rd, rs 算术左移指令
0917 BE0 FD FF FF FF inc pc
0918 BE4 FF 47 EF FF path [pc], ir
0919 BE8 FF C1 E3 FF path rs, w
0920 BEC BF C1 E1 FF path rd, a
0921 BF0 FF C9 E8 7F path alu_sal, rd
0922 BF4 FF D3 EB FF path shift_flag, flag
0923 BF8 FD FF FF FF inc pc
0924 BFC CB FF FF FF check irq
0925 C00 C3 FF FF FF reset upc
0926
0927 C04 FF FF FF FF dup 7, null
0928
0929
0930 ;===========================================================================
0931 ;97. sar rd, rs 算术右移指令
0932 C20 FD FF FF FF inc pc
0933 C24 FF 47 EF FF path [pc], ir
0934 C28 FF C1 E3 FF path rs, w
0935 C2C BF C1 E1 FF path rd, a
0936 C30 FF C9 E9 7F path alu_sar, rd
0937 C34 FF D3 EB FF path shift_flag, flag
0938 C38 FD FF FF FF inc pc
0939 C3C CB FF FF FF check irq
0940 C40 C3 FF FF FF reset upc
0941
0942 C44 FF FF FF FF dup 7, null
0943
0944
0945 ;===========================================================================
0946 ;99. shl rd, rs 逻辑左移指令
0947 C60 FD FF FF FF inc pc
0948 C64 FF 47 EF FF path [pc], ir
0949 C68 FF C1 E3 FF path rs, w
0950 C6C BF C1 E1 FF path rd, a
0951 C70 FF C9 E8 3F path alu_shl, rd
0952 C74 FF D3 EB FF path shift_flag, flag
0953 C78 FD FF FF FF inc pc
0954 C7C CB FF FF FF check irq
0955 C80 C3 FF FF FF reset upc
0956
0957 C84 FF FF FF FF dup 7, null
0958
0959
0960 ;===========================================================================
0961 ;101. shr rd, rs 逻辑右移指令
0962 CA0 FD FF FF FF inc pc
0963 CA4 FF 47 EF FF path [pc], ir
0964 CA8 FF C1 E3 FF path rs, w
0965 CAC BF C1 E1 FF path rd, a
0966 CB0 FF C9 E9 3F path alu_shr, rd
0967 CB4 FF D3 EB FF path shift_flag, flag
0968 CB8 FD FF FF FF inc pc
0969 CBC CB FF FF FF check irq
0970 CC0 C3 FF FF FF reset upc
0971
0972 CC4 FF FF FF FF dup 7, null
0973
0974
0975 ;===========================================================================
0976 ;103. rol rd, rs 不带进位的循环左移指令
0977 CE0 FD FF FF FF inc pc
0978 CE4 FF 47 EF FF path [pc], ir
0979 CE8 FF C1 E3 FF path rs, w
0980 CEC BF C1 E1 FF path rd, a
0981 CF0 FF C9 E8 BF path alu_rol, rd
0982 CF4 FF D3 EB FF path shift_flag, flag
0983 CF8 FD FF FF FF inc pc
0984 CFC CB FF FF FF check irq
0985 D00 C3 FF FF FF reset upc
0986
0987 D04 FF FF FF FF dup 7, null
0988
0989
0990 ;===========================================================================
0991 ;105. ror rd, rs 不带进位的循环右移指令
0992 D20 FD FF FF FF inc pc
0993 D24 FF 47 EF FF path [pc], ir
0994 D28 FF C1 E3 FF path rs, w
0995 D2C BF C1 E1 FF path rd, a
0996 D30 FF C9 E9 BF path alu_ror, rd
0997 D34 FF D3 EB FF path shift_flag, flag
0998 D38 FD FF FF FF inc pc
0999 D3C CB FF FF FF check irq
1000 D40 C3 FF FF FF reset upc
1001
1002 D44 FF FF FF FF dup 7, null
1003
1004
1005 ;===========================================================================
1006 ;107. rcl rd, rs 带进位的循环左移指令
1007 D60 FD FF FF FF inc pc
1008 D64 FF 47 EF FF path [pc], ir
1009 D68 FF C1 E3 FF path rs, w
1010 D6C BF C1 E1 FF path rd, a
1011 D70 FF C9 E8 FF path alu_rcl, rd
1012 D74 FF D3 EB FF path shift_flag, flag
1013 D78 FD FF FF FF inc pc
1014 D7C CB FF FF FF check irq
1015 D80 C3 FF FF FF reset upc
1016
1017 D84 FF FF FF FF dup 7, null
1018
1019
1020 ;===========================================================================
1021 ;109. rcr rd, rs 带进位的循环右移指令
1022 DA0 FD FF FF FF inc pc
1023 DA4 FF 47 EF FF path [pc], ir
1024 DA8 FF C1 E3 FF path rs, w
1025 DAC BF C1 E1 FF path rd, a
1026 DB0 FF C9 E9 FF path alu_rcr, rd
1027 DB4 FF D3 EB FF path shift_flag, flag
1028 DB8 FD FF FF FF inc pc
1029 DBC CB FF FF FF check irq
1030 DC0 C3 FF FF FF reset upc
1031
1032 DC4 FF FF FF FF dup 7, null
1033
1034 ;===========================================================================
1035 ;111. nop 空指令
1036 DE0 FD FF FF FF inc pc
1037 DE4 C3 FF FF FF reset upc
1038
1039 DE8 FF FF FF FF dup 6, null
1040
1041 ;===========================================================================
1042 ;112. hlt 停机
1043 E00 C3 FF FF FF reset upc
1044 E04 FF FF FF FF dup 7, null
1045
1046
1047 ;===========================================================================
1048 ;113. call symbol
1049 ; 入栈时，栈顶向低地址方向生长，sp-1，为入栈对象分配新的存储空间
1050 E20 BF C1 E1 FF path sp, a
1051 E24 BF C1 E3 FF path sp, w
1052 E28 FF D1 E9 DF path alu_dec, sp ; sp = sp - 1
1053 E2C BF C1 E5 FF path sp, mar ; 将sp转移到mar中，为返回地址入栈做准备
1054
1055 ; 读出标号指定的跳转地址并暂存到寄存器a中
1056 E30 FD FF FF FF inc pc
1057 E34 FF 47 E1 FF path [pc], a
1058
1059 ; 将下一条指令地址（返回地址）入栈
1060 E38 FD FF FF FF inc pc
1061 E3C FF 85 E7 FF path pc, [mar]
1062
1063 ; 将a中暂存的跳转地址置入pc，实现子程序调用
1064 E40 FF D0 FF FF path a, pc
1065 E44 CB FF FF FF check irq
1066 E48 C3 FF FF FF reset upc
1067
1068 E4C FF FF FF FF dup 5, null
1069
1070 ;===========================================================================
1071 ;115. ret 子程序调用返回指令
1072 E60 BF C1 E5 FF path sp, mar
1073 E64 FF 86 FF FF path [mar], pc ; 首先读出栈指针sp指向存储单元的内容，即返回地址，
1074 ; 将其加载到PC中，实现调用返回
1075
1076 E68 BF C1 E1 FF path sp, a
1077 E6C FF D1 E9 D0 path alu_inc, sp ; 然后将sp加1，sp指向新的栈顶，即出栈
1078 ; 出栈时，栈顶向高地址空间生长
1079 E70 C3 FF FF FF reset upc
1080
1081 E74 FF FF FF FF dup 3, null
1082
1083
1084 ;===========================================================================
1085 ;116. cli 关中断指令
1086 E80 D3 FF FF FF cli ; 清零中断标志允许位IF=0，禁止硬中断请求
1087 E84 FD FF FF FF inc pc
1088 E88 C3 FF FF FF reset upc
1089
1090 E8C FF FF FF FF dup 5, null
1091
1092 ;===========================================================================
1093 ;117. sti 开中断指令
1094 EA0 D7 FF FF FF sti ; 设置中断允许标志位IF=1，允许硬中断请求
1095 EA4 FD FF FF FF inc pc
1096 EA8 C3 FF FF FF reset upc
1097
1098 EAC FF FF FF FF dup 5, null
1099
1100
1101 ;===========================================================================
1102 ;118. 硬中断处理微指令程序
1103 ; 标志寄存器和断点地址入栈
1104 EC0 BF C1 E1 FF path sp, a
1105 EC4 BF C1 E3 FF path sp, w
1106 EC8 FF D1 E9 DF path alu_dec, sp ; sp减1，指向新的栈顶，为标志寄存器入栈做准备
1107 ECC BF C1 E5 FF path sp, mar
1108 ED0 FF 83 E7 FF path flag, [mar] ; 将标志寄存器入栈，入栈时，栈向低地址空间生长
1109 ED4 BF C1 E1 FF path sp, a
1110 ED8 FF D1 E9 DF path alu_dec, sp ; sp减1，为返回地址入栈做准备
1111 EDC BF C1 E5 FF path sp, mar
1112 EE0 FF 85 E7 FF path pc, [mar] ; 当前PC指向下一条指令，正是返回地址，将其入栈
1113
1114
1115 ; 从8259读取中断号，依据中断号得到对应中断向量
1116 EE4 CF FF FF FF inta ; cpu 发出第一个中断应答信号INTA
1117 EE8 FF FF FF FF dup 1, null ; 插入空闲周期，其目的是分开前后两次发出的中断应答信号，便于8259进行识别
1118 ; 使得INTA信号的变化情况为 低电平--高电平--低电平，其中低电平表示应答信号有效
1119 EEC CE C7 E5 FF path inta, mar ; cpu发出第二个中断应答信号INTA，读取中断向量并送入地址寄存器中
1120
1121
1122 ; 转移到中断服务程序执行
1123 EF0 FF 86 FF FF path [mar], pc ; 将mar中的中断向量指向存储单元的内容传送到PC中，
1124 ; 中断向量指向的存储单元实际存储的就是该中断服务程序的入口地址（首条指令地址）
1125 ; 于是，PC转去执行中断服务程序
1126 EF4 C3 FF FF FF reset upc
1127
1128 EF8 FF FF FF FF dup 2, null
1129
1130
1131 ;===========================================================================
1132 ;120. inc rd 自增
1133 F00 FD FF FF FF inc pc
1134 F04 FF 47 EF FF path [pc], ir
1135 F08 BF C1 E1 FF path rd, a
1136 F0C FF D1 E9 D0 path alu_inc, rd ; 将累加器a加1的结果写入目的寄存器rd中
1137 F10 FF CB EB FF path al_flag, flag
1138 F14 FD FF FF FF inc pc
1139 F18 CB FF FF FF check irq
1140 F1C C3 FF FF FF reset upc
1141
1142
1143 ;===========================================================================
1144 ;121. dec rd 自减
1145 F20 FD FF FF FF inc pc
1146 F24 FF 47 EF FF path [pc], ir
1147 F28 BF C1 E1 FF path rd, a
1148 F2C BF C1 E3 FF path rd, w
1149 F30 FF D1 E9 DF path alu_dec, rd ; 将累加器a减1的结果写入目的寄存器rd中
1150 F34 FF CB EB FF path al_flag, flag
1151 F38 FD FF FF FF inc pc
1152 F3C CB FF FF FF check irq
1153 F40 C3 FF FF FF reset upc
1154
1155 F44 FF FF FF FF dup 7, null
\ No newline at end of file
rom.masm 0 → 100644
浏览文件 @ 0646239b
; 每一条汇编指令，即8086指令对应一段微程序，每一段微程序分配的空间总是8的倍数
; 若一条指令对应微指令的条数少于8的倍数，那么使用占位微指令填充
; 因此，所有指令的第一条微指令地址必须是8的倍数
; 取指微指令，所有指令的第一步均为取指操作，都要执行该条微指令
;===========================================================================
;0.取指指令
fetch instruction
dup 7, null ; 7条占位微指令，本身没有意义，只起占位作用
;===========================================================================
;1.mov reg, imm 将立即数imm传送到寄存器reg中
inc pc ; pc加1
path [pc], ir ; 将pc指定存储单元的字节传送到指令寄存器ir中
inc pc
path [pc], rd ; 将pc指定存储单元的字节传送到目的寄存器中，目的寄存器由指令寄存器ir中的低4位指定
inc pc
check irq ; 查询8086的硬中断请求输入INTR，若INTR为高电平，表示有中断请求，
; 那么uPC转去执行固定的硬中断处理微程序，完成断点入栈并加载中断服务程序入口地址到PC，
; 运行中断服务程序
reset upc ; 地址0传送到uPC寄存器输入端，下个时钟上升沿到来时，uPC写入0
; 微程序存储器ROM输出0地址处的微指令，即fetch instruction取指微指令，
; 在该微指令控制下，下个时钟上升沿到来时，取出PC指向的指令
dup 1, null
;===========================================================================
;2.mov rd， rs 将源寄存器rs的内容传送到目的寄存器rd中
inc pc
path [pc], ir
path rs, rd ; 将rs的内容传送到rd中，指令寄存器ir中的低四位表示目的寄存器rd，
; 高四位表示源寄存器rs
inc pc
check irq
reset upc
dup 2, null
;===========================================================================
;3.mov reg， symbol 将标号symbol指定存储单元的内容传送到寄存器中
inc pc
path [pc], ir
inc pc
path [pc], mar ; 把pc指定单元的数据（源操作数地址symbol）传送到地址寄存器mar中
path [mar], rd ; 把mar指定存储单元的数据传送到目的寄存器rd中
inc pc
check irq
reset upc
;===========================================================================
;4.mov rd, [rs] 将源地址寄存器rs指定存储单元的数据传送到目的寄存器rd中
inc pc
path [pc], ir
path rs, mar ; 将源寄存器rs保存的地址转移到地址寄存器mar中
path [mar], rd
inc pc
check irq
reset upc
dup 1, null
;===========================================================================
;5.mov [rd], rs 将源寄存器rs的数据传送到目的地址寄存器rd指定的存储单元中
inc pc
path [pc], ir
path rd, mar ; 将目的寄存器rd保存的地址转移到地址寄存器mar中
path rs, [mar] ; 将源寄存器rs的数据传送到地址寄存器mar指定存储单元
inc pc
check irq
reset upc
dup 1, null
;===========================================================================
;6.mov [rd], imm 将立即数传送到目的寄存器rd指定存储单元中
inc pc
path [pc], ir
inc pc
path [pc], rd
inc pc
check irq
reset upc
dup 1, null
;===========================================================================
;7. mov symbol, rs 将源寄存器rs的数据传送到标号symbol指定存储单元中
inc pc
path [pc], ir
inc pc
path [pc], mar
path rs, [mar]
inc pc
check irq
reset upc
;===========================================================================
;8. add rd, rs 源寄存器rs与目的寄存器rd相加，无进位加法，结果写回rd中
inc pc
path [pc], ir
path rd, a ; 将目的寄存器rd的数据传送到累加器a中
path rs, w ; 将源寄存器rs的数据传送到工作寄存器w中，
; a和w均为alu运算单元中的操作数寄存器
path alu_add, rd ; 将累加器a与工作寄存器w相加的结果写回目的寄存器rd中
path al_flag, flag ; 将运算标志位写入标志寄存器flag中
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;10. add rd, [rs] 源寄存器rs指定存储单元的数据与目的寄存器rd相加，结果写回rd中
inc pc
path [pc], ir
path rs, mar ; 把源寄存器rs的内容作为地址传送到mar中
path [mar], w ; 将mar指定存储单元的数据传送到alu的工作寄存器w中
path rd, a ; 把目的寄存器rd的数据传送到alu的累加器a中
path alu_add, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;12. add rd, symbol 将标号symbol指定存储单元的数据传送到目的寄存器rd中
inc pc
path [pc], ir
inc pc
path [pc], mar
path [mar], w
path rd, a
path alu_add, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 5, null
;===========================================================================
;14. add rd, imm 将立即数imm传送到目的寄存器rd中
inc pc
path [pc], ir
inc pc
path [pc], w
path rd, a
path alu_add, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;16. adc rd, rs rs与rd进行带进位的加法，结果写回目的寄存器rd中
inc pc
path [pc], ir
path rd, a
path rs, w
path alu_adc, rd ; 将alu的累加器a与工作寄存器w进行无进位加法所得结果写回rd
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;18. adc rd, [rs]
inc pc
path [pc], ir
path rs, mar
path [mar], w
path rd, a
path alu_adc, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;20. adc rd, symbol
inc pc
path [pc], ir
inc pc
path [pc], mar
path [mar], w
path rd, a
path alu_adc, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 5, null
;===========================================================================
;22. adc rd, imm
inc pc
path [pc], ir
inc pc
path [pc], w
path rd, a
path alu_adc, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;24. sub rd, rs 将目的寄存器rd减去源寄存器rs，所得结果写回rd
inc pc
path [pc], ir
path rd, a
path rs, w
path alu_sub, rd ; 无进位的减法，rd = rd - rs
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;26. sub rd, [rs]
inc pc
path [pc], ir
path rs, mar
path [mar], w
path rd, a
path alu_sub, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;28. sub rd, symbol
inc pc
path [pc], ir
inc pc
path [pc], mar
path [mar], w ; 将mar指定存储单元的数据传送到alu的工作寄存器w中
path rd, a
path alu_sub, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 5, null
;===========================================================================
;30. sub rd, imm
inc pc
path [pc], ir
inc pc
path [pc], w
path rd, a
path alu_sub, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;32. sbb rd, rs 带进位的减法
inc pc
path [pc], ir
path rd, a
path rs, w
path alu_sbb, rd ; alu中的累加器a减去工作寄存器w，再减去低位的借位，
; 所得结果写回目的寄存器rd中
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;34. sbb rd, [rs]
inc pc
path [pc], ir
path rs, mar
path [mar], w
path rd, a
path alu_sbb, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;36. sbb rd, symbol
inc pc
path [pc], ir
inc pc
path [pc], mar
path [mar], w
path rd, a
path alu_sbb, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 5, null
;===========================================================================
;38. sbb a, imm
inc pc
path [pc], ir
inc pc
path [pc], w
path rd, a
path alu_sbb, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;40.空指令
dup 8, null
;41.空指令
dup 8, null
;===========================================================================
;42. and rd, rs
inc pc
path [pc], ir
path rd, a
path rs, w
path alu_and, rd ; alu中的累加器a与工作寄存器w进行按位与运算，结果写回rd中
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;44. and rd, [rs]
inc pc
path [pc], ir
path rs, mar
path [mar], w
path rd, a
path alu_and, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;46. and rd, symbol
inc pc
path [pc], ir
inc pc
path [pc], mar
path [mar], w
path rd, a
path alu_and, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 5, null
;===========================================================================
;48. and rd, imm
inc pc
path [pc], ir
inc pc
path [pc], w
path rd, a
path alu_and, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;50. or rd, rs
inc pc
path [pc], ir
path rd, a
path rs, w
path alu_or, rd ; 将alu中的累加器a与工作寄存器w进行按位或运算，结果写回rd中
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;52. or rd, [rs]
inc pc
path [pc], ir
path rs, mar
path [mar], w
path rd, a
path alu_or, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;54. or rd, symbol
inc pc
path [pc], ir
inc pc
path [pc], mar
path [mar], w
path rd, a
path alu_or, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 5, null
;===========================================================================
;56. or rd, imm
inc pc
path [pc], ir
inc pc
path [pc], w
path rd, a
path alu_or, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;58. xor rd, rs rs与rd进行异或运算，结果写回rd
inc pc
path [pc], ir
path rd, a
path rs, w
path alu_xor, rd ; 将累加器a与工作寄存器w进行按位异或运算的结果写回rd
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;60. xor rd, [reg]
inc pc
path [pc], ir
path rs, mar
path [mar], w
path rd, a
path alu_xor, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;62. xor rd, symbol
inc pc
path [pc], ir
inc pc
path [pc], mar
path [mar], w
path rd, a
path alu_xor, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 5, null
;===========================================================================
;64. xor rd, imm
inc pc
path [pc], ir
inc pc
path [pc], w
path rd, a
path alu_xor, rd
path al_flag, flag
inc pc
check irq
reset upc
dup 6, null
;===========================================================================
;66. push rs 将rs寄存器的内容入栈保存
; 更新栈顶
path sp, a ; 将栈寄存器sp传送到累加器a中
path alu_dec, sp ; sp = sp -1，入栈时，sp做减法，向低地址空间生长
; 入栈
path sp, mar ; 把新的栈指针sp传送到地址寄存器mar中
path rs, [mar] ; 把rs寄存器的内容传送到mar指定存储单元，完成入栈保存
inc pc
check irq
reset upc
dup 1, null
;===========================================================================
;67. pop rd 将栈寄存器sp指定存储单元内容出栈，并写入目的寄存器rd中
; 出栈
path sp, mar ; 把栈寄存器sp传送到地址寄存器mar中
path [mar], rd ; 把mar指定存储单元内容传送到目的寄存器rd中，完成出栈
; 出栈后需要更新栈顶
path sp, a ; 把sp传送到a
path alu_inc, sp ; 出栈时，栈顶向高地址空间生长，因此将sp加1
inc pc
check irq
reset upc
dup 1, null
;===========================================================================
;68. not reg 按位取反运算，reg既是源操作数也是目的操作数
inc pc
path [pc], ir
path rd, a ; 把reg作为源操作数传送到a中
path alu_not, rd ; 将a取反运算的结果写回目的寄存器rd
path al_flag, flag
inc pc
check irq
reset upc
;===========================================================================
; test指令主要影响ZF标志
;69. test reg, imm
inc pc
path [pc], ir
path rd, a
inc pc
path [pc], w
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;71. cmp reg, immediate 比较寄存器reg与立即数的大小，修改标志寄存器
inc pc
path [pc], ir
path rd, a ; 把比较寄存器的内容传送到累加器a中
inc pc ; PC加1，指向立即数字节
path [pc], w ; 把立即数传送到工作寄存器w中
path alu_sub, a ; 寄存器减去立即数的结果写回a中
path al_flag, flag ; 把相减后的标志写入标志寄存器中
inc pc
hold DMA ; 查询DMA请求，若有DMA请求，则停止运行，cpu让出总线给8237控制器使用
; DMA传送结束后，从该处继续运行微程序
check irq
reset upc
dup 5, null
;===========================================================================
;73. cmp reg, reg
inc pc
path [pc], ir
path rd, a
path rs, w
path alu_sub, a
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;75. in al, imm 把立即数imm指定的外设端口数据读入cpu内部寄存器al中
inc pc
path [pc], ir
inc pc
path [pc], mar
path <mar>, rd ; 把mar指定的外设端口寄存器的数据传送到目的寄存器rd中
inc pc
reset upc
dup 1, null
;===========================================================================
;76. in al, dl
inc pc
path [pc], ir
path rs, mar
path <mar>, rd
inc pc
reset upc
dup 2, null
;===========================================================================
;77. out dl, al
inc pc
path [pc], ir
path rd, mar
path rs, <mar>
inc pc
reset upc
dup 2, null
;===========================================================================
;78. out imm, al 把al的数据传送到imm指定的外设端口
inc pc
path [pc], ir
inc pc
path [pc], mar
path rs, <mar> ; 把源寄存器rs的内容传送到mar指定的外设端口
inc pc
reset upc
dup 1, null
;===========================================================================
;79. lea rd, symbol 把标号symbol表示的地址传送到寄存器rd中
inc pc
path [pc], ir
inc pc
path [pc], rd
inc pc
check irq
reset upc
dup 1, null
;=====================================================================
;80. ja symbol
check irq
inc pc
path pc, mar ;将PC值传送到地址寄存器mar中
;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
;若转移条件不成立，则PC加1，指向下一条指令
path ja[mar], pc
reset upc
dup 3, null
;=====================================================================
;81. jb symbol
check irq
inc pc
path pc, mar
;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
;若转移条件不成立，则PC加1，指向下一条指令
path jb[mar], pc
reset upc
dup 3, null
;=====================================================================
;82. jg symbol
check irq
inc pc
path pc, mar
;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
;若转移条件不成立，则PC加1，指向下一条指令
path jg[mar], pc
reset upc
dup 3, null
;=====================================================================
;83. jl symbol
check irq
inc pc
path pc, mar
;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
;若转移条件不成立，则PC加1，指向下一条指令
path jl[mar], pc
reset upc
dup 3, null
;=====================================================================
;84. je symbol
check irq
inc pc
path pc, mar
;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
;若转移条件不成立，则PC加1，指向下一条指令
path jz[mar], pc
reset upc
dup 3, null
;=====================================================================
;85. jne symbol
check irq
inc pc
path pc, mar
;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
;若转移条件不成立，则PC加1，指向下一条指令
path jnz[mar], pc
reset upc
dup 3, null
;=====================================================================
;86. jc symbol
check irq
inc pc
path pc, mar
;若转移条件成立，则将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中
;若转移条件不成立，则PC加1，指向下一条指令
path jc[mar], pc
reset upc
dup 3, null
;=====================================================================
;87. jmp symbol
check irq
inc pc
path pc, mar
;将地址寄存器mar指定存储单元的值作为跳转地址加载到pc中，无条件跳转
path jmp[mar], pc
reset upc
dup 3, null
;=====================================================================
;88. loop symbol 将cl作为目的操作数减1，改变零标志，若zf = 1，则跳转
inc pc
path [pc], ir
path rd, a
path alu_dec, rd
path al_flag, flag
inc pc
path pc, mar
path jmp[mar], pc
check irq
reset upc
dup 6, null
;====================================================================================================
; 软中断，首先将标志寄存器入栈，清除中断标志IF，并将当前程序断点的地址入栈保护，从
; 中断向量表中获取中断入口地址，CPU转向中断入口地址去执行相应的中断服务程序。
; 中断向量表段地址保存在ES寄存器中
;90. int immediate
; 将标志寄存器入栈
inc pc
path [pc], ir
path sp, a
path sp, w
path alu_dec, sp
path sp, mar
path flag, [mar]
; 更新栈顶
path sp, a
path sp, w
path alu_dec, sp
; 计算中断服务程序入口地址
inc pc
path [pc], mar
inc pc ;下一条指令地址（中断返回地址）暂存到a
path pc, a
; 将中断服务程序入口地址置入pc，准备执行服务程序
path [mar], pc
; 将a中的返回地址入栈
path sp, mar
path a, [mar]
reset upc
dup 6, null
;====================================================================================================
; 中断返回指令，执行出栈操作，后进先出
;93. iret
inc pc
path [pc], ir
; 恢复中断返回地址，即中断返回地址出栈
path sp, mar
path [mar], pc
; 出栈后栈顶指针寄存器sp加1，指向先于返回地址入栈的对象
path sp, a
path alu_inc, sp
; 恢复标志寄存器内容，即标志寄存器FLAG出栈
path sp, mar
path [mar], flag
; 出栈后栈顶指针寄存器sp加1，指向先于标志寄存器入栈的对象
path sp, a
path alu_inc, sp
; 查询中断请求，若存在，则继续处理中断
check irq
reset upc
dup 4, null
;====================================================================================================
;95. sal rd, rs 算术左移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_sal, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;97. sar rd, rs 算术右移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_sar, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;99. shl rd, rs 逻辑左移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_shl, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;101. shr rd, rs 逻辑右移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_shr, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;103. rol rd, rs 不带进位的循环左移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_rol, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;105. ror rd, rs 不带进位的循环右移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_ror, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;107. rcl rd, rs 带进位的循环左移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_rcl, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;109. rcr rd, rs 带进位的循环右移指令
inc pc
path [pc], ir
path rs, w
path rd, a
path alu_rcr, rd
path shift_flag, flag
inc pc
check irq
reset upc
dup 7, null
;===========================================================================
;111. nop 空指令
inc pc
reset upc
dup 6, null
;===========================================================================
;112. hlt 停机
reset upc
dup 7, null
;===========================================================================
;113. call symbol
; 入栈时，栈顶向低地址方向生长，sp-1，为入栈对象分配新的存储空间
path sp, a
path sp, w
path alu_dec, sp ; sp = sp - 1
path sp, mar ; 将sp转移到mar中，为返回地址入栈做准备
; 读出标号指定的跳转地址并暂存到寄存器a中
inc pc
path [pc], a
; 将下一条指令地址（返回地址）入栈
inc pc
path pc, [mar]
; 将a中暂存的跳转地址置入pc，实现子程序调用
path a, pc
check irq
reset upc
dup 5, null
;===========================================================================
;115. ret 子程序调用返回指令
path sp, mar
path [mar], pc ; 首先读出栈指针sp指向存储单元的内容，即返回地址，
; 将其加载到PC中，实现调用返回
path sp, a
path alu_inc, sp ; 然后将sp加1，sp指向新的栈顶，即出栈
; 出栈时，栈顶向高地址空间生长
reset upc
dup 3, null
;===========================================================================
;116. cli 关中断指令
cli ; 清零中断标志允许位IF=0，禁止硬中断请求
inc pc
reset upc
dup 5, null
;===========================================================================
;117. sti 开中断指令
sti ; 设置中断允许标志位IF=1，允许硬中断请求
inc pc
reset upc
dup 5, null
;===========================================================================
;118. 硬中断处理微指令程序
; 标志寄存器和断点地址入栈
path sp, a
path sp, w
path alu_dec, sp ; sp减1，指向新的栈顶，为标志寄存器入栈做准备
path sp, mar
path flag, [mar] ; 将标志寄存器入栈，入栈时，栈向低地址空间生长
path sp, a
path alu_dec, sp ; sp减1，为返回地址入栈做准备
path sp, mar
path pc, [mar] ; 当前PC指向下一条指令，正是返回地址，将其入栈
; 从8259读取中断号，依据中断号得到对应中断向量
inta ; cpu 发出第一个中断应答信号INTA
dup 1, null ; 插入空闲周期，其目的是分开前后两次发出的中断应答信号，便于8259进行识别
; 使得INTA信号的变化情况为 低电平--高电平--低电平，其中低电平表示应答信号有效
path inta, mar ; cpu发出第二个中断应答信号INTA，读取中断向量并送入地址寄存器中
; 转移到中断服务程序执行
path [mar], pc ; 将mar中的中断向量指向存储单元的内容传送到PC中，
; 中断向量指向的存储单元实际存储的就是该中断服务程序的入口地址（首条指令地址）
; 于是，PC转去执行中断服务程序
reset upc
dup 2, null
;===========================================================================
;120. inc rd 自增
inc pc
path [pc], ir
path rd, a
path alu_inc, rd ; 将累加器a加1的结果写入目的寄存器rd中
path al_flag, flag
inc pc
check irq
reset upc
;===========================================================================
;121. dec rd 自减
inc pc
path [pc], ir
path rd, a
path rd, w
path alu_dec, rd ; 将累加器a减1的结果写入目的寄存器rd中
path al_flag, flag
inc pc
check irq
reset upc
dup 7, null
\ No newline at end of file
rom.rxm 0 → 100644
浏览文件 @ 0646239b
GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG߿GGGGGGGGGGGGGG?_GG߿GGпGGG?G?GGGG߿G߿߿GG
\ No newline at end of file
uPC_NEXT.dlsche 0 → 100644
浏览文件 @ 0646239b
添加文件
uPC_NEXT.dlsche.svg 0 → 100644
浏览文件 @ 0646239b
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1508" y="748">2</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="778">^A1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="778">23</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="808">^A2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="808">21</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="838">^A3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="838">19</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1508" y="896">1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="928">^B1</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="958">^B2</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1522" y="987">18</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="1058">S0</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="1088">S1</text>
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<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="1209">7</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1572" y="1238">M</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1018">^G</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="898">CN4</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="898">16</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="808">^F2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="808">11</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="778">^F1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="778">10</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1448">^A0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1508" y="1448">2</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="1478" y2="1478"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1478">^A1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="1478">23</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="1508" y2="1508"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1508">^A2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="1508">21</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="1538" y2="1538"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1538">^A3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="1538">19</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="1598" y2="1598"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1598">^B0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1508" y="1596">1</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="1628" y2="1628"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1628">^B1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1522" y="1627">22</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="1658" y2="1658"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1658">^B2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1522" y="1657">20</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="1688" y2="1688"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="1688">^B3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1522" y="1687">18</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="1758" y2="1758"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="1758">S0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="1756">6</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="1788" y2="1788"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="1788">S1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="1787">5</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="1818" y2="1818"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="1818">S2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="1817">4</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="1848" y2="1848"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="1848">S3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="1847">3</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="1908" y2="1908"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="1908">CN</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="1909">7</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="1938" y2="1938"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1572" y="1938">M</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="1939">8</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="1718" y2="1718"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1718">^G</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="1718">17</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="1688" y2="1688"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1688">^P</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="1688">15</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1689" x2="1739" y1="1628" y2="1628"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1628">AEQB</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="1628">14</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1689" x2="1739" y1="1598" y2="1598"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1598">CN4</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="1598">16</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="1538" y2="1538"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1538">^F3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="1538">13</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="1508" y2="1508"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1508">^F2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="1508">11</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="1478" y2="1478"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1478">^F1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="1478">10</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="1448" y2="1448"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="1448">^F0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1717" y="1447">9</text>
<circle cx="1534" cy="1688" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="1508" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="1598" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="1538" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="1477" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1534" cy="1658" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1534" cy="1448" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="1628" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1693" cy="1449" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1694" cy="1479" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1694" cy="1508" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1693" cy="1538" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1693" cy="1688" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1693" cy="1719" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<rect fill="#ffffff" fill-opacity="0.5" height="550" stroke="#000000" stroke-width="5" width="150" x="1539" y="1408"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1606" y="1388">U2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1549" y="2004">74LS181</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2188" y2="2188"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2188">^A0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1508" y="2188">2</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2218" y2="2218"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2218">^A1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="2218">23</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2248" y2="2248"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2248">^A2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="2248">21</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2278" y2="2278"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2278">^A3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1521" y="2278">19</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2338" y2="2338"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2338">^B0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1508" y="2336">1</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2368" y2="2368"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2368">^B1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1522" y="2367">22</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2398" y2="2398"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2398">^B2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1522" y="2397">20</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1529" x2="1489" y1="2428" y2="2428"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1592" y="2428">^B3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1522" y="2427">18</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="2498" y2="2498"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="2498">S0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="2496">6</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="2528" y2="2528"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="2528">S1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="2527">5</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="2558" y2="2558"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="2558">S2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="2557">4</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="2588" y2="2588"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="2588">S3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="2587">3</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="2648" y2="2648"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1582" y="2648">CN</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="2649">7</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1539" x2="1489" y1="2678" y2="2678"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1572" y="2678">M</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1509" y="2679">8</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="2458" y2="2458"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2458">^G</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="2458">17</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="2428" y2="2428"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2428">^P</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="2428">15</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1689" x2="1739" y1="2368" y2="2368"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2368">AEQB</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="2368">14</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1689" x2="1739" y1="2338" y2="2338"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2338">CN4</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="2338">16</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="2278" y2="2278"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2278">^F3</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="2278">13</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="2248" y2="2248"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2248">^F2</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="2248">11</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="2218" y2="2218"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2218">^F1</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1704" y="2218">10</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1699" x2="1739" y1="2188" y2="2188"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="middle" x="1656" y="2188">^F0</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1717" y="2187">9</text>
<circle cx="1534" cy="2428" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="2248" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="2338" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="2278" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="2217" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1534" cy="2398" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1534" cy="2188" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1533" cy="2368" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1693" cy="2189" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1694" cy="2219" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1694" cy="2248" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1693" cy="2278" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
<circle cx="1693" cy="2428" fill="#ffffff" fill-opacity="0.5" r="4" stroke="#000000" stroke-width="5"/>
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