【正文】 MOVC A，@A+DPTR MOV DPTR,7F01H MOVX @DPTR,A ACALL DL1MS INC R0 MOV A,R3 JNB , START RR A MOV R3,A AJMP AGAIN DDEG:DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H,0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EHDL1MS: MOV R7,01HDL0:MOV R6,0FFHDL1:DJNZ R6,DL1DJNZ R7,DL0RETEND ，按任意鍵在顯示器上顯示對(duì)應(yīng)鍵值，要求顯示值能左移。 當(dāng)k0=0時(shí)，第一排鍵為98AF，第二排鍵為EB32.；當(dāng)k0=1時(shí)，第一排鍵為17CD，第二排鍵為5604.ORG 0000HLJMP MAINORG 1000HMAIN: MOV 53H,00H MOV 52H,00H MOV 51H,00H MOV 50H,50HKEYSUB：MOV A,03H MOV DPTR,7F00H MOVX @DPTR,ABEGIN: ACALL DIS ACALL CLEAR ACALL CCSCAN JNZ INK1 AJMP BEGININK1: ACALL DIS ACALL DL1MS ACALL DL1MS ACALL CLEAR ACALL CCSCAN JNZ INK2 AJMP BEGININK2: MOV R2,0F7H MOV R4,00HCOLUM: MOV DPTR,7F02H MOV A,R2 MOVX @DPTR,A INC DPTR MOVX A,@DPTR JB LONE MOV A,00H AJMP KCODELONE: JB ,NEXT MOV A,04HKCODE: ADD A,R4 ACALL LP1 ACALL PUTBUF PUSH ACCKON: ACALL DIS ACALL CLEAR ACALL CCSCAN JNZ KON POP ACCNEXT: INC R4 MOV A,R2 JNB ,KERR RL A MOV R2, A AJMP COLUMKERR: AJMP BEGINCCSCAN: MOV DPTR,7F02H MOV A,00H MOVX @DPTR,A INC DPTR MOVX A,@DPTR CPL A ANL A,30H RETCLEAR: MOV DPTR,7F01H MOV A,00H MOVX @DPTR,ARETDIS: PUSH ACC PUSH 00H PUSH 03H MOV A,03H MOV DPTR,7F00H MOV R0,50H MOV R3,0F7H MOV A,R3AGAIN: MOV DPTR,7F02H MOVX @DPTR,A MOV DPTR,7F03H MOV A,@DPTR JNB ,STEP1 MOV DPTR ,ADDR AJMP