init template

364da964 · 赵鹏翀 · 364da964 · 364da964 · 364da964 · 364da964
--- a/.gitignore
+++ b/.gitignore
+/*.img
+/bochs
+/Debug
+/Release
+bochsout.txt
\ No newline at end of file
--- a/Demo051.asmproj
+++ b/Demo051.asmproj
+<?xml version="1.0" encoding="gb2312"?>
+<ASMProject Version="1.00" Name="Demo051">
+	<Configurations>
+		<Configuration Name="Debug" ConfigurationType="2">
+			<Tool Name="PreBuildEventTool"/>
+			<Tool Name="CustomBuildTool"/>
+			<Tool Name="GCCCompilerTool"/>
+			<Tool Name="JWASMAssemblerTool" ObjectFormate="5" GenerateDebugInformation="-1" VersionDebugInfo="-1" AdditionalOptions="/W0"/>
+			<Tool Name="PreLinkEventTool"/>
+			<Tool Name="GCCLinkerTool"/>
+			<Tool Name="JWlinkLinkerTool" AdditionalOptions="disable 1014"/>
+			<Tool Name="PostBuildEventTool"/>
+		</Configuration>
+	</Configurations>
+	<Files>
+		<Filter Name="Դļ" Filter="asm">
+			<File RelativePath=".\main.asm">
+			</File>
+		</Filter>
+	</Files>
+</ASMProject>
--- a/Demo051.puo
+++ b/Demo051.puo
--- a/main.asm
+++ b/main.asm
+assume cs:code
+stack segment
+   db 128 dup (0)
+stack ends
+data segment
+   dw 0, 0
+data ends
+code segment
+start:
+   mov ax, stack
+   mov ss, ax
+   mov sp, 128
+   mov ax, data
+   mov ds, ax
+   mov ax, 0
+   mov es, ax
+   push es:[9*4]
+   pop ds:[0]
+   push es:[9*4+2]
+   pop ds:[2]            ;将原来的int 9中断例程的入口地址保存在ds:0、ds:2单元中
+   mov word ptr es:[9*4], offset int9
+   mov es:[9*4+2], cs    ;在中断向量表中设置新的int 9中断例程的入口地址
+   mov ax, 0b800h
+   mov es, ax
+   mov ah, 'a'
+s:
+   mov es:[160*12+40*2], ah
+   call delay
+   inc ah
+   cmp ah, 'z'
+   jna s
+   mov ax, 0
+   mov es, ax
+   push ds:[0]
+   pop es:[9*4]
+   push ds:[2]
+   pop es:[9*4+2]       ;将中断向量表中int 9中断例程的入口恢复为原来的地址
+   mov ax, 4c00h
+   int 21h
+delay:                  ;循环延时
+   push ax
+   push dx
+   mov dx, 2000h          ;数字可根据自己机器的速度设置
+   mov ax, 0
+s1:
+   sub ax, 1
+   sbb dx, 0
+   cmp ax, 0
+   jne s1
+   cmp dx, 0
+   jne s1
+   pop dx
+   pop ax
+   ret
+;-------------新的int 9中断例程-----------------  
+int9:
+   push ax
+   push bx
+   push es
+   in al, 60h
+   pushf  
+   pushf                      ;因为进入中断例程后，IF和TF都已经置0，所以可不必再设置
+   pop bx
+   and bh, 11111100b
+   push bx
+   popf
+   call dword ptr ds:[0]      ;对ing指令进行模拟，调用原来的int 9中断例程
+   cmp al, 1
+   jne int9ret
+   mov ax, 0b800h
+   mov es, ax
+   inc byte ptr es:[160*12+40*2+1]        ;将属性值加1，改变颜色
+int9ret:
+   pop es
+   pop bx
+   pop ax
+   iret
+code ends
+end start   
\ No newline at end of file