一道单片机的题。A=12H,B=0FH,R0=20H,(20H)=45H,CY=1?答:MOV A,@R0:A=45H MOV A,20H:INC A:A=13H DEC A:A=11H XCH A,R0:A=20H XCDA,@R0:A=20H SWAP A:A=21H ADD A,R0:A=32H,CY=0 ADDC A,R0:A=33H,CY=0 SUBB A,20H:A=0DDH,CY=1 答题不易,如有帮助请采纳,谢谢!!
单片机原理及接口技术的实验,求大神!!!答:1:MOV R0,#40H MOV R2,#30 LP:MOV @R0,#0 INC R0 DJNZ R2,LP 2:MOV DPTR,#7000H MOV R2,#30 LP:CLR A MOVX @DPTR,A INC DPTR DJNZ R2,LP 3:MOV R0,#20H MOV R2,#40 LP:MOV @R0,#0FEH INC R0 DJNZ R2,LP 4:MOV A,30H ANL A,#0FH XCH A,30H MOV A,40H ANL A,...