eg0706.lst

宏汇编器

Microsoft (R) Macro Assembler Version 6.15.8803		    08/20/07 14:47:50
eg0706.asm						     Page 1 - 1


				;eg0706.asm in DOS
					include io16.inc
			      C .nolist    ; Do not list following content
			      C .list
			      C 
 0000					.data
 0000 41 20 38 32 35 39		intmsg	byte  'A 8259A Interrupt !',0dh,0ah,0
       41 20 49 6E 74 65
       72 72 75 70 74 20
       21 0D 0A 00
 0016 00			counter	byte 0	;中断次数记录单元
 0000					.code
 0000				start:
 0000  B8 ---- R			mov ax,@data
 0003  8E D8				mov ds,ax
 0005  B8 3508				mov ax,3508h	;获取原中断向量
 0008  CD 21				int 21h
 000A  06				push es	;保存原中断向量（利用堆栈）
 000B  53				push bx
 000C  FA				cli	;关中断
 000D  1E				push ds	;设置新中断向量 
 000E  B8 ---- R			mov ax,seg new08h
 0011  8E D8				mov ds,ax
 0013  BA 0041 R			mov dx,offset new08h
 0016  B8 2508				mov ax,2508h
 0019  CD 21				int 21h
 001B  1F				pop ds
 001C  E4 21				in al,21h	;读出IMR
 001E  50				push ax	;保存原IMR内容
 001F  24 FE				and al,0feh	;允许IRQ0，其他不变
 0021  E6 21				out 21h,al	;设置新IMR内容	
 0023  C6 06 0016 R 00			mov counter,0	;设置中断次数初值
 0028  FB				sti	;开中断
					;主程序完成中断服务程序设置，可以处理其他事务
 0029  80 3E 0016 R 0A		start1:	cmp counter,10	;本例的主程序仅循环等待中断
 002E  72 F9				jb start1	;中断10次退出
					;
 0030  FA				cli	;关中断
 0031  58				pop ax	;恢复IMR
 0032  E6 21				out 21h,al
 0034  5A				pop dx	;恢复原中断向量
 0035  1F				pop ds
 0036  B8 2508				mov ax,2508h
 0039  CD 21				int 21h
 003B  FB				sti	;开中断
					exit 0
 003C  B8 4C00		     1		mov ax,4c00h+0
 003F  CD 21		     1		int 21h

					; 中断服务程序
 0041				new08h	proc 
 0041  FB				sti	;开中断
 0042  50				push ax	;保护寄存器
 0043  56				push si
 0044  1E				push ds
 0045  B8 ---- R			mov ax,@data	;外部随机产生中断，DS也不确定，所以必须设置DS
 0048  8E D8				mov ds,ax
 004A  FE 06 0016 R			inc counter	;中断次数加1
 004E  BE 0000 R			mov si,offset intmsg	;显示信息
 0051  E8 0008				call dpstri 
 0054  B0 20				mov al,20h	;发送EOI命令
 0056  E6 20				out 20h,al
 0058  1F				pop ds	;恢复寄存器
 0059  5E				pop si
 005A  58				pop ax
 005B  CF				iret	;中断返回
 005C				new08h	endp
 005C				dpstri	proc	;显示字符串子程序
 005C  50				push ax	;入口参数：DS:SI＝字符串首址
 005D  53				push bx
 005E  8A 04			dps1:	mov al,[si]
 0060  3C 00				cmp al,0
 0062  74 0A				jz dps2
 0064  BB 0000				mov bx,0	;调用ROM-BIOS功能显示al中的字符
 0067  B4 0E				mov ah,0eh
 0069  CD 10				int 10h
 006B  46				inc si
 006C  EB F0				jmp dps1
 006E  5B			dps2:	pop bx
 006F  58				pop ax
 0070  C3				ret
 0071				dpstri	endp

					end start
Microsoft (R) Macro Assembler Version 6.15.8803		    08/20/07 14:47:50
eg0706.asm						     Symbols 2 - 1




Macros:

                N a m e                 Type

exit . . . . . . . . . . . . . .	Proc


Segments and Groups:

                N a m e                 Size     Length   Align   Combine Class

DGROUP . . . . . . . . . . . . .	GROUP
_DATA  . . . . . . . . . . . . .	16 Bit	 0017	  Word	  Public  'DATA'	
STACK  . . . . . . . . . . . . .	16 Bit	 0400	  Para	  Stack	  'STACK'	 
_TEXT  . . . . . . . . . . . . .	16 Bit	 0071	  Word	  Public  'CODE'	


Procedures,  parameters and locals:

                N a m e                 Type     Value    Attr

dpstri . . . . . . . . . . . . .	P Near	 005C	  _TEXT	Length= 0015 Public
  dps1 . . . . . . . . . . . . .	L Near	 005E	  _TEXT	
  dps2 . . . . . . . . . . . . .	L Near	 006E	  _TEXT	
new08h . . . . . . . . . . . . .	P Near	 0041	  _TEXT	Length= 001B Public


Symbols:

                N a m e                 Type     Value    Attr

@CodeSize  . . . . . . . . . . .	Number	 0000h	 
@DataSize  . . . . . . . . . . .	Number	 0000h	 
@Interface . . . . . . . . . . .	Number	 0000h	 
@Model . . . . . . . . . . . . .	Number	 0002h	 
@code  . . . . . . . . . . . . .	Text   	 _TEXT
@data  . . . . . . . . . . . . .	Text   	 DGROUP
@fardata?  . . . . . . . . . . .	Text   	 FAR_BSS
@fardata . . . . . . . . . . . .	Text   	 FAR_DATA
@stack . . . . . . . . . . . . .	Text   	 DGROUP
counter  . . . . . . . . . . . .	Byte	 0016	  _DATA	
dispbb . . . . . . . . . . . . .	L Near	 0000	  External
dispbd . . . . . . . . . . . . .	L Near	 0000	  External
dispbw . . . . . . . . . . . . .	L Near	 0000	  External
dispcrlf . . . . . . . . . . . .	L Near	 0000	  External
dispc  . . . . . . . . . . . . .	L Near	 0000	  External
disphb . . . . . . . . . . . . .	L Near	 0000	  External
disphd . . . . . . . . . . . . .	L Near	 0000	  External
disphw . . . . . . . . . . . . .	L Near	 0000	  External
dispmsg  . . . . . . . . . . . .	L Near	 0000	  External
disprb . . . . . . . . . . . . .	L Near	 0000	  External
disprd . . . . . . . . . . . . .	L Near	 0000	  External
disprf . . . . . . . . . . . . .	L Near	 0000	  External
disprw . . . . . . . . . . . . .	L Near	 0000	  External
dispsib  . . . . . . . . . . . .	L Near	 0000	  External
dispsid  . . . . . . . . . . . .	L Near	 0000	  External
dispsiw  . . . . . . . . . . . .	L Near	 0000	  External
dispuib  . . . . . . . . . . . .	L Near	 0000	  External
dispuid  . . . . . . . . . . . .	L Near	 0000	  External
dispuiw  . . . . . . . . . . . .	L Near	 0000	  External
intmsg . . . . . . . . . . . . .	Byte	 0000	  _DATA	
readbb . . . . . . . . . . . . .	L Near	 0000	  External
readbd . . . . . . . . . . . . .	L Near	 0000	  External
readbw . . . . . . . . . . . . .	L Near	 0000	  External
readc  . . . . . . . . . . . . .	L Near	 0000	  External
readhb . . . . . . . . . . . . .	L Near	 0000	  External
readhd . . . . . . . . . . . . .	L Near	 0000	  External
readhw . . . . . . . . . . . . .	L Near	 0000	  External
readmsg  . . . . . . . . . . . .	L Near	 0000	  External
readsib  . . . . . . . . . . . .	L Near	 0000	  External
readsid  . . . . . . . . . . . .	L Near	 0000	  External
readsiw  . . . . . . . . . . . .	L Near	 0000	  External
readuib  . . . . . . . . . . . .	L Near	 0000	  External
readuid  . . . . . . . . . . . .	L Near	 0000	  External
readuiw  . . . . . . . . . . . .	L Near	 0000	  External
start1 . . . . . . . . . . . . .	L Near	 0029	  _TEXT	
start  . . . . . . . . . . . . .	L Near	 0000	  _TEXT	

	   0 Warnings
	   0 Errors