eg0705.lst

宏汇编器

Microsoft (R) Macro Assembler Version 6.15.8803		    08/20/07 14:47:14
eg0705.asm						     Page 1 - 1


				;eg0705.asm in DOS
					include io16.inc
			      C .nolist    ; Do not list following content
			      C .list
			      C 
 0000					.data
 0000 0000			intoff	word ?	;用于保存原中断服务程序的偏移地址
 0002 0000			intseg	word ? 	;用于保存原中断服务程序的段地址
 0004 41 20 49 6E 73 74		intmsg	byte 'A Instruction Interrupt !',0dh,0ah,0	;字符串（以0结尾）
       72 75 63 74 69 6F
       6E 20 49 6E 74 65
       72 72 75 70 74 20
       21 0D 0A 00
 0000					.code
 0000				start:
 0000  B8 ---- R			mov ax,@data
 0003  8E D8				mov ds,ax
 0005  B8 3580				mov ax,3580h	;获取系统的原80H中断向量
 0008  CD 21				int 21h
 000A  89 1E 0000 R			mov intoff,bx	;保存偏移地址
 000E  8C 06 0002 R			mov intseg,es	;保存段基地址
 0012  1E				push ds
 0013  BA 0039 R			mov dx,offset new80h
 0016  B8 ---- R			mov ax,seg new80h
 0019  8E D8				mov ds,ax
 001B  B8 2580				mov ax,2580h	;设置本程序的80H中断向量
 001E  CD 21				int 21h
 0020  1F				pop ds
					;
 0021  BA 0004 R			mov dx,offset intmsg	;设置入口参数DS和DX
 0024  CD 80				int 80h	;调用80H中断服务程序，显示字符串
					;
 0026  8B 16 0000 R			mov dx,intoff	;恢复系统的原80H中断向量
 002A  A1 0002 R			mov ax,intseg	;注意先设置DX、后设置DS入口参数
 002D  8E D8				mov ds,ax	;因为先改变了DS，就不能准确取得intoff变量值
 002F  B8 2580				mov ax,2580h
 0032  CD 21				int 21h
					exit 0
 0034  B8 4C00		     1		mov ax,4c00h+0
 0037  CD 21		     1		int 21h

					;80H内部中断服务程序：显示字符串（以0结尾）；DS∶DX＝缓冲区首地址
 0039				new80h	proc	;过程定义
 0039  FB				sti	;开中断
 003A  50				push ax	;保护寄存器
 003B  53				push bx
 003C  56				push si
 003D  8B F2				mov si,dx
 003F  8A 04			new1:	mov al,[si]	;获取欲显示字符
 0041  3C 00				cmp al,0	;为“0”结束
 0043  74 0A				jz new2
 0045  BB 0000				mov bx,0	;采用ROM-BIOS调用显示一个字符
 0048  B4 0E				mov ah,0eh
 004A  CD 10				int 10h
 004C  46				inc si	;显示下一个字符
 004D  EB F0				jmp new1
 004F  5E			new2:	pop si	;恢复寄存器
 0050  5B				pop bx
 0051  58				pop ax
 0052  CF				iret	;中断返回
 0053				new80h	endp	;中断服务程序结束

					end start
Microsoft (R) Macro Assembler Version 6.15.8803		    08/20/07 14:47:14
eg0705.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	 0020	  Word	  Public  'DATA'	
STACK  . . . . . . . . . . . . .	16 Bit	 0400	  Para	  Stack	  'STACK'	 
_TEXT  . . . . . . . . . . . . .	16 Bit	 0053	  Word	  Public  'CODE'	


Procedures,  parameters and locals:

                N a m e                 Type     Value    Attr

new80h . . . . . . . . . . . . .	P Near	 0039	  _TEXT	Length= 001A Public
  new1 . . . . . . . . . . . . .	L Near	 003F	  _TEXT	
  new2 . . . . . . . . . . . . .	L Near	 004F	  _TEXT	


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
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	 0004	  _DATA	
intoff . . . . . . . . . . . . .	Word	 0000	  _DATA	
intseg . . . . . . . . . . . . .	Word	 0002	  _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
start  . . . . . . . . . . . . .	L Near	 0000	  _TEXT	

	   0 Warnings
	   0 Errors