?? 上.txt
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文件頭:
C8279 EQU 20AH
D8279 EQU 208H
C8255 EQU 203H
P8255C EQU 202H
CODE SEGMENT
ASSUME CS:CODE,DS:CODE
START:PUSH CS
POP DS
INI:MOV DX,C8255
MOV AL,80H
OUT DX,AL
MOV DX,C8279
MOV AL,00H
OUT DX,AL
MOV AL,2AH
OUT DX,AL
MOV AL,90H
OUT DX,AL
MOV AL,0D1H
OUT DX,AL
JMP SHORT $+2
WAIT1:IN AL,DX
MOV AH,AL
AND AL,80H
JNZ WAIT1
MOV AL,AH
AND AL,0FH
CMP AL,00H
JE WAIT1
LEA BX,STEP
RUN:CALL CHKKEY
CALL DISPLAY
MOV CX,08H
LOOP3:MOV DX,P8255C
MOV AL,[SI]
OUT DX,AL
INC SI
CALL DELAY
LOOP LOOP3
JMP RUN
CHKKEY PROC NEAR
RDKEY:MOV DX,C8279
IN AL,DX
MOV AH,AL
AND AL,80H
CMP AL,80H
JE RDKEY
MOV AL,AH
AND AL,0FH
CMP AL,00H
JE RTN
M
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