Subtraction of two 16 bit numbers

Program Name

Write a Assembly Language Program for Subtraction of two 16 bit numbers.

Theory

Instruction Mnemonic	Operand	Comments
LDA	8100	Load contents of 8100 half 1st input of 16-bit into accumulator
MOV	B,A	Move 1st 8-bit input of 16-bit half to register B
LDA	8200	Load the 1st 8-bit input of half 2nd 16-bit to accumulator
SUB	B	Subtract the content of B to accumulator and store in accumulator
STA	8300	Store result of 1st 8-bit in 8300
LDA	8101	Load 1st input of 16-bit remaining half 16-bit input to accumulator
MOV	B,A	Move 2nd 8-bit input of 1st 16-bit input to register B
LDA	8201	Load 2nd input of 1st remaining half 16-bit input
SBB	B	Subtract with carry content of B to accumulator
STA	8301	Store result of 2nd 8-bit in 8301
HLT		Stop

Program Code


LDA	8100
MOV	B,A
LDA	8200
SUB	B
STA	8300
LDA	8101
MOV	B,A
LDA	8201
SBB	B
STA	8301
HLT

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