【正文】 OV AL,0FEH ； 鍵盤掃描識(shí)別 OUT DX,AL MOV DX,0602H IN AL,DX TEST AL,08H JNZ KEY_7 CALL KEY0 JMP STTK KEY_7: TEST AL,10H JNZ KEY_2 CALL KEY4 JMP STTK KEY_2: MOV DX,0600H MOV AL,0FDH OUT DX,AL MOV DX,0602H IN AL,DX TEST AL,08H JNZ KEY_6 CALL KEY1 JMP STTK KEY_6: TEST AL,10H JNZ KEY_1 CALL KEY5 JMP STTK KEY_1: MOV DX,0600H MOV AL,0FBH OUT DX,AL MOV DX,0602H IN AL,DX TEST AL,08H JNZ KEY_5 CALL KEY2 JMP STTK KEY_5: TEST AL,10H JNZ KEY_0 CALL KEY6 JMP STTK KEY_0: MOV DX,0600H MOV AL,0F7H OUT DX,AL MOV DX,0602H IN AL,DX TEST AL,08H JNZ KEY_4 CALL KEY3 JMP STTK KEY_4: TEST AL,10H JNZ KEY_C1 CALL KEY7 KEY_C1: JMP STTK ； ；按鍵 0處理子程序 KEY0: CALL LP1 MOV AL,0EEH MOV [SI+5],AL MOV AL,00H MOV [DI+5],AL CALL DISP ；顯示 RET ；返回 ； ；按鍵 1處理子程序 KEY1: CALL LP1 MOV AL,3EH MOV [SI+5],AL MOV AL,01H MOV [DI+5],AL CALL DISP ；顯示 RET ；返回 ； ；按鍵 2處理子程序 KEY2: CALL LP1 MOV AL,0F6H MOV [SI+5],AL MOV AL,02H MOV [DI+5],AL CALL DISP ；顯示 RET ；返回 ； ；按鍵 3處理子程序 KEY3: CALL LP1 MOV AL,0F2H MOV [SI+5],AL MOV AL,03H MOV [DI+5],AL CALL DISP ；顯示 10 RET ；返回 ； ；按鍵 4處理子程序 KEY4: CALL LP1 MOV AL,66H MOV [SI+5],AL MOV AL,04H MOV [DI+5],AL CALL DISP ；顯示 RET ；返回 ； ；按鍵 5處理子程序 KEY5: CALL LP1 MOV AL,0BEH MOV [SI+5],AL MOV AL,05H MOV [DI+5],AL CALL DISP ；顯示 RET ；返回 ； ；按鍵 6處理子程序 KEY6: CALL LP1 MOV AL,8EH MOV [SI+5],AL MOV AL,06H MOV [DI+5],AL CALL DISP ； 顯示 RET ；返回 ； ；按鍵 7處理子程序 KEY7: CALL LP1 MOV AL,9CH MOV [SI+5],AL MOV AL,07H MOV [DI+5],AL CALL DISP ；顯示 RET ；返回 ； ；數(shù)據(jù)移位保存子程序 LP1: MOV SI,OFFSET VA2 MOV DI,OFFSET VA3 MOV CX,0005H LP2: MOV AL,[SI+4] MOV [SI+5],AL MOV AL,[DI+4] MOV [DI+5],AL DEC SI DEC DI LOOP LP2 RET ； ；顯示子程序 DISP: MOV SI,OFFSET VA1 MOV DI,OFFSET VA2 MOV DL,[DI+5] CMP DL,0FCH JNZ DIR5 MOV DL,[DI+4] CMP DL,0FCH JNZ DIR4 MOV DL,[DI+3] CMP DL,0FCH JNZ DIR3 MOV DL,[DI+2] CMP DL,0FCH JNZ DIR2 MOV DL,[DI+1] CMP DL,0FCH JNZ DIR1 JMP DIR0 DIR5： MOV CX,0006H JMP DIR DIR4： MOV CX,0005H JMP DIR DIR3： MOV CX,0004