进行中断链接分配

发布于 2024-10-19 06:32:05 字数 280 浏览 4 评论 0原文

正如标题所说，我正在尝试进行中断链接。我正在寻找的是，当调用定时器中断（IRQ 0）并且中断处理程序（ISR）完成时，它会执行我的代码。我正在尝试使用汇编语言、C 语言或任何允许我这样做的语言来实现这一点。我在此页面上找到了一个示例，但是它不适用于 TASM。您能帮我解决这个问题吗？或者我可以在哪里找到有关此问题的信息？谢谢。：D

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任谁 2024-10-26 06:32:05

我不再使用它，但只是想再次使用我在汇编中给出的第一步的汇编器：

.186
.MODEL TINY, C

.code
ORG 100h

Entry:
; Install handler
   push   ds
   xor    cx, cx
   mov    ds, cx
   mov    ax, ds:[8*4]
   mov    dx, ds:[8*4+2]
   cli
   mov    ds:[8*4], OFFSET InterruptHandler
   mov    ds:[8*4+2], cs
   pop    ds
   mov    word ptr [OldIntVect], ax
   mov    word ptr [OldIntVect+2], dx
   sti

; Wait for the user to press a key. In the meantime you should see lots of wildcards!
   xor   ax, ax
   int   16h

; Restore original handler
   mov    ax, word ptr [OldIntVect]
   mov    dx, word ptr [OldIntVect+2]
   push   ds
   xor    cx, cx
   mov    ds, cx
   cli
   mov    ds:[8*4], ax
   mov    ds:[8*4+2], dx
   sti
   pop    ds

; Exit to DOS
   int   20h

PROC MyHandler

   mov   ah, 0Eh
   mov   al, '*'
   int   10h
   ret
ENDP


InterruptHandler:
   pushf
   call  cs:[OldIntVect]
   cmp   [busy], 0
   jne   ExitHandler ; If jumps then the timer was faster than the time it takes for MyHandler to complete

   mov   cs:[busy], 1
   pusha
   call  MyHandler ; Other options are using a pointer to function or just inlining the code here.
   popa
   mov   cs:[busy], 0

ExitHandler:
   iret

OldIntVect dd ?
busy       db ?

END Entry

在WinXP（32位）下测试：

>tasm timer.asm
Turbo Assembler  Version 1.01  Copyright (c) 1988, 1989 Borland International

Assembling file:   TIMER.ASM
Error messages:    None
Warning messages:  None
Remaining memory:  481k


>tlink /t timer.obj
Turbo Link  Version 3.0 Copyright (c) 1987, 1990 Borland International

>timer
***************************

但这当然仅对DOS环境有效（DOSBox，Windows 32 位版本等），最多对引导加载程序进行一些调整。

不管怎样，谢谢你给我带来的美好时光，让我重拾这一切：P

I'm not using it anymore, but just wanted to play again with probably the assembler I gave my first steps in assembly:

.186
.MODEL TINY, C

.code
ORG 100h

Entry:
; Install handler
   push   ds
   xor    cx, cx
   mov    ds, cx
   mov    ax, ds:[8*4]
   mov    dx, ds:[8*4+2]
   cli
   mov    ds:[8*4], OFFSET InterruptHandler
   mov    ds:[8*4+2], cs
   pop    ds
   mov    word ptr [OldIntVect], ax
   mov    word ptr [OldIntVect+2], dx
   sti

; Wait for the user to press a key. In the meantime you should see lots of wildcards!
   xor   ax, ax
   int   16h

; Restore original handler
   mov    ax, word ptr [OldIntVect]
   mov    dx, word ptr [OldIntVect+2]
   push   ds
   xor    cx, cx
   mov    ds, cx
   cli
   mov    ds:[8*4], ax
   mov    ds:[8*4+2], dx
   sti
   pop    ds

; Exit to DOS
   int   20h

PROC MyHandler

   mov   ah, 0Eh
   mov   al, '*'
   int   10h
   ret
ENDP


InterruptHandler:
   pushf
   call  cs:[OldIntVect]
   cmp   [busy], 0
   jne   ExitHandler ; If jumps then the timer was faster than the time it takes for MyHandler to complete

   mov   cs:[busy], 1
   pusha
   call  MyHandler ; Other options are using a pointer to function or just inlining the code here.
   popa
   mov   cs:[busy], 0

ExitHandler:
   iret

OldIntVect dd ?
busy       db ?

END Entry

Tested under WinXP (32-bit):

>tasm timer.asm
Turbo Assembler  Version 1.01  Copyright (c) 1988, 1989 Borland International

Assembling file:   TIMER.ASM
Error messages:    None
Warning messages:  None
Remaining memory:  481k


>tlink /t timer.obj
Turbo Link  Version 3.0 Copyright (c) 1987, 1990 Borland International

>timer
***************************

But this of course is only valid for a DOS environment (DOSBox, Windows 32-bit versions, etc.) and with some tweaks for a bootloader at most.

Anyway, thanks for the beautiful time you just gave me reviving all this :P

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