16:
SUM:
CLR A
MOV 43H,A
MOV 44H,A
MOV A,40H
ADD A,41H
MOV 43H,A
CLR A
ADDC A,44H
MOV 44H,A
XCH A,43H
ADD A,42H
XCH A,43H
ADDC A,44H
MOV 44H,A
RET
17:
COMP:
MOV A,30H
CJNE A,31H,COMP1
COMP1:
JC COMP2
MOV 31H,A
COMP2:
RET
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