MADD1: MOV A,R3 ORL A,R4 MADD6: CLR OV MOV A,R6 ORL A,R7 MADD5: CLR A MOV R3,A MOV R4,A MOV R2,#41H MOV A,R7 MOV B,R4 MOV A,B XCH A,R7 MOV B,R3 ADD A,R7 MOV R7,A CLR A ADDC A,B XCH A,R4 MOV B,R6 ADD A,R7 MOV R7,A MOV A,B ADDC A,R4 MOV R4,A CLR A RLC A XCH A,R3 MOV B,R6 ADD A,R4 MOV R4,A MOV A,B ADDC A,R3 MOV R3,A JB ACC.7,MADD2 MOV A,R7 RLC A MOV R7,A RL1: MOV A,R4 RLC A MOV R4,A MOV A,R3 RLC A MOV R3,A DEC R2 CJNE R2,#0C0H,RL1E CLR A MOV R3,A MOV R4,A MOV R2,#0C1H RET MADD2: MOV A,R7 JNB ACC.7,MADD3 INC R4 MOV A,R4 JNZ MADD3 INC R3 MOV A,R3 JNZ MADD3 MOV R3,#80H INC R2 MADD3: MOV A,R2 ADD A,R5 RET