单片机 计算器 程序 加减乘除等XS: MOV R0,#30H ;数码管显示
MOV R1,#10H
MOV A,R1
XS1:MOV P2,A
MOV A,@R0
MOV DPTR,#TAB1
MOVC A,@A+DPTR
MOV P0,A
ACALL DL1
INC R0
MOV A,R1
JB ACC.7,XS2
RL A
MOV R1,A
SJMP XS1
XS2:RET
DL1:MOV R6,#0FAH
DL2:DJNZ R6,DL2
RET
TAB1:DB 81H,0EDH,43H,49H,2DH
DB 19H,11H,0CDH,01H,09H
DB 80H,0ECH,42H,48H,2CH,18H
