单片机,c51汇编语言编写程序答:SUBDATA: CLR C MOV A,41H SUBB A,43H MOV A,40H SUBB A,42H JC SUBD1 MOV 44H,40H MOV 45H,41H MOV 46H,42H MOV 47H,43H RETSUBD1: MOV 44H,42H MOV 45H,43H MOV 46H,40H MOV 47H,41H RET ...
51单片机编程,汇编语言,实现外部RAM 4000H 存放20个数据,正数传送到内 ...答:DATM:MOV DPTR,#4000H MOV R2,#20 MOV R0,#30H MOV R1,#50H LOOP:MOVX A,@DPTR JB ACC.7,LOOP1 MOV @R1,A INC R1 SJMP LOOP2 LOOP1:MOV @R0,A INC R0 LOOP2:INC DPTR DJNZ R2,LOOP RET