BCD SUBTRACTION

ADDRESS	OPCODE	LABEL	MNEMONICS	OPERAND	COMMENT
4100		START	MVI	D, 00	Clear D reg.
4101
4102			LXI	H, 4500	Initialize HL reg. to 4500
4103
4104
4105			MOV	B, M	Transfer first data to accumulator
4106			INX	H	Increment HL reg. to point next mem. Location.
4107			MOV	C, M	Move second no. to B reg.
4108			MVI	A, 99	Move 99 to the Accumulator
4109
410A			SUB	C	Subtract [C] from  acc. Content.
410B			INR	A	Increment  A  register
410C			ADD	B	Add [B] with [A]
410D			DAA		Adjust Accumulator value for Decimal digits
410E			JC	LOOP	Jump on carry to loop
410F
4110
4111			INR	D	Increment D reg.
4112		LOOP	INX	H	Increment HL register pair
4113			MOV	M , A	Move the Acc.content to the memory location
4114			INX	H	Increment HL reg. to point next mem. Location.
4115			MOV	M, D	Transfer D register content to memory.
4116			HLT		Stop the program