修改8086芯片

773e5b3c · 李川 · 李川 · 8322ec68 · 773e5b3c · 773e5b3c
--- a/8086.dlsche
+++ b/8086.dlsche
--- a/8086.dlsche.svg
+++ b/8086.dlsche.svg
--- a/CU.dlsche
+++ b/CU.dlsche
--- a/CU.dlsche.svg
+++ b/CU.dlsche.svg
--- a/README.md
+++ b/README.md
 # 说明
 Intel 8086 处理器
+# Datasheet
+[8086.pdf](8086.pdf)
 # 原理图
-![8086](https://www.codecode.net/engintime/Dream-Logic/Intel-classic-chips/8086/raw/master/8086.dlsche.svg)
\ No newline at end of file
+![raw svg](8086.dlsche.svg)
\ No newline at end of file
--- a/microasm.c
+++ b/microasm.c
@@ -94,6 +94,7 @@ 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]";
@@ -319,6 +320,7 @@ struct KEYWORD_FUNCTION_ENTRY
 // 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";
@@ -398,7 +400,7 @@ void parse_fetch(int line_num)
 }


-// check
+// check irq
 void parse_check(int line_num)
 {
 	unsigned long ul = 0xffffffcb;
@@ -406,6 +408,14 @@ void parse_check(int line_num)
 	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)
 {
@@ -534,6 +544,7 @@ struct KEYWORD_FUNCTION_ENTRY keyword_function_table[] =

 	,{ &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 }

--- a/microasm.exe
+++ b/microasm.exe
--- a/rom.dbg
+++ b/rom.dbg
--- a/rom.lst
+++ b/rom.lst
--- a/rom.masm
+++ b/rom.masm
@@ -14,7 +14,7 @@ path [pc], ir
 inc pc
 path [pc], rd
 inc pc
-check irq
+check irq		;查询硬中断
 reset upc

 dup 1, null 
@@ -306,7 +306,7 @@ reset upc

 dup 6, null

-;40. 
+;40.
 dup 8, null

 ;41.
@@ -542,9 +542,10 @@ path alu_sub, a
 path al_flag, flag
 inc pc
 check irq
+hold DMA		;查询DMA请求
 reset upc

-dup 6, null
+dup 5, null

 ;73. cmp reg, reg
 inc pc
@@ -963,8 +964,7 @@ path sp, a
 path alu_dec, sp
 path sp, mar
 path pc, [mar]
-; IF标志置位，开中断，允许中断嵌套
-sti
+
 ; 获取中断号中断服务程序入口地址
 inta
 dup 1, null		;插入空闲周期
@@ -973,7 +973,7 @@ path inta, mar	;读取中断号并送入地址寄存器中
 path [mar], pc
 reset upc

-dup 1, null
+dup 2, null

 ;120. inc reg
 inc pc

--- a/rom.rxm
+++ b/rom.rxm
-GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG߿GGGGGGGGGGGGGG?_GG߿GGGGG?G?GGGG߿G߿߿GG
\ No newline at end of file
+GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG߿GGGGGGGGGGGGGG?_GG߿GGGGG?G?GGGG߿G߿߿GG
\ No newline at end of file