Perform the subtraction of two 16-bit numbers using ALP.

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;           F6 96 H

 ;       -  C6 79 H

 ;      =  30 1D H

 ;R1=30H(MSB),    R0=1DH(LSB)


ORG 0000H

CLR C

MOV A,#96H

MOV R6,#79H

SUBB A,R6

JNC GO

CPL A

INC A

GO:MOV R0,A

MOV A,#0F6H

MOV R7,#0C6H

SUBB A,R7

JNC GO1

CPL A

INC A

GO1:MOV R1,A

END


 

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