2_ram.lst

可作为接口实验的参考教材

Microsoft (R) Macro Assembler Version 5.00                  1/22/4                                                             Page     1-1


				;//********************************************
				******************** 
				;文件名: SRAM for 8088 
				 
				;功能: 扩展存储器读写实验 
				 
				;接线: 用导线连接CPU模块的ERAM到SRAM模块的CS_RA
				M； 
				;      扩展输出模块的CS_273到CPU模块的200H； 
				;      扩展输出模块的JD1C到八位逻辑电平显示模块
				的JD4B。 
				;//********************************************
				******************** 
 = 0200				D273    EQU    200H         ;输出口地址 
				 
 0000				DATA    SEGMENT 
 0000				DATA    ENDS 
				 
 0000				STACK   SEGMENT 
 0000  0032[			STA     DW 50 DUP(?) 
	   ????			
			 ]	
				
 = 0032				TOP     EQU LENGTH STA 
 0064				STACK   ENDS 
				 
 0000				CODE    SEGMENT 
				ASSUME  CS:CODE,DS:DATA,SS:STACK,ES:DATA 
				 
 0000				START: 
 0000  B8 6000			        MOV     AX,6000H     ;附加段寄存器 
 0003  8E C0			        MOV     ES,AX 
 0005  BB 0000			        MOV     BX,0000H 
 0008  B9 000F			        MOV     CX,0FH 
 000B  B2 30			        MOV     DL,30H 
 000D  FE C2			REP1:   INC     DL 
 000F  26: 88 17		        MOV     ES:[BX],DL 
 0012  43			        INC     BX 
 0013  E2 F8			        LOOP    REP1 
 0015  BB 0000			        MOV     BX,0000H 
 0018  B9 000F			        MOV     CX,0FH 
 001B  B0 31			        mov     al,31h 
				         
 001D  26: 8A 17		REP2:   MOV     DL,ES:[BX]      ;从扩充内存读出
				并显示 
 0020  3A C2			        cmp     al,dl 
 0022  75 0D			        jnz     err 
 0024  43			        inc     bx 
 0025  FE C0			        inc     al 
 0027  E2 F4			        LOOP    REP2 
 0029				ok: 
 0029  BA 0200			        MOV     DX,D273         
 002C  B0 FE			        MOV     AL,0FEH        ;读写正确点亮L0 
 002E  EE			        OUT     DX,AL 
Microsoft (R) Macro Assembler Version 5.00                  1/22/4                                                             Page     1-2


 002F  EB F8			        jmp     ok 
				      
 0031  BA 0200			err:    MOV     DX,D273 
 0034  B0 FD			        MOV     AL,0FDH        ;读写错误点亮L1 
 0036  EE			        OUT     DX,AL 
 0037  EB F8			        jmp     err 
				         
 0039				        CODE    ENDS 
				END     START 
Microsoft (R) Macro Assembler Version 5.00                  1/22/4                                                             Symbols-1


Segments and Groups:

                N a m e         	Length	 Align	Combine Class

CODE . . . . . . . . . . . . . .  	0039	PARA	NONE	
DATA . . . . . . . . . . . . . .  	0000	PARA	NONE	
STACK  . . . . . . . . . . . . .  	0064	PARA	NONE	

Symbols:            

                N a m e         	Type	 Value	 Attr

D273 . . . . . . . . . . . . . .  	NUMBER	0200	

ERR  . . . . . . . . . . . . . .  	L NEAR	0031	CODE

OK . . . . . . . . . . . . . . .  	L NEAR	0029	CODE

REP1 . . . . . . . . . . . . . .  	L NEAR	000D	CODE
REP2 . . . . . . . . . . . . . .  	L NEAR	001D	CODE

STA  . . . . . . . . . . . . . .  	L WORD	0000	STACK	Length = 0032
START  . . . . . . . . . . . . .  	L NEAR	0000	CODE

TOP  . . . . . . . . . . . . . .  	NUMBER	0032	

@FILENAME  . . . . . . . . . . .  	TEXT  2_ram		


     55 Source  Lines
     55 Total   Lines
     13 Symbols

  50204 + 451124 Bytes symbol space free

      0 Warning Errors
      0 Severe  Errors