📄 idiv.asm
字号:
;除法运算
ORG 0000H
MAIN: MOV 39H,#00H
MOV 38H,#023H
ACALL DV0
MOV R3,30H
MOV R4,39H
DV0: CLR C
MOV A,39H
SUBB A,#22H
JC DV1
SETB OV
RET
DV1: MOV R6,#08H
DV2: MOV A,38H
RLC A
MOV 38H,A
MOV A,39H
RLC A
MOV 39H,A
MOV F0,C
CLR C
SUBB A,#22H
ANL C,/F0
JC DV5
MOV 39H,A
DV5: CPL C
MOV A,30H
RLC A
MOV 30H,A
DJNZ R6,DV2
MOV A,39H
ADD A,39H
JC DV3
SUBB A,#22H
JC DV4
DV3: INC 30H
DV4: CLR OV
;DEC 30H
RET
;
END
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