16 BIT DATA SUBTRACTION

ADDRESS	OPCODE	LABEL	MNEMO NICS	OPER AND	COMMENTS
8000		START	MVI	C, 00	Initialize C reg.
8001
8002			LHLD	8050H	Load the subtrahend in DE reg. Pair through HL reg. pair.
8003
8004
8005			XCHG
8006			LHLD	8052H	Load the minuend in HL reg. Pair.
8007
8008
8009			MOV	A, L	Move the content of reg. L to Acc.
800A			SUB	E	Subtract the content of  reg. E from that of acc.
800B			MOV	L, A	Move the content of Acc. to reg. L
800C			MOV	A, H	Move the content of reg. H to Acc.
800D			SBB	D	Subtract content of reg. D with that of Acc.
800E			MOV	H, A	Transfer content of acc. to reg. H
800F			SHLD	8054H	Store the content of HL pair in memory location 8504H.
8010
8011
8012			JNC	NEXT	If there is borrow, go to the instruction labeled NEXT.
8013
8014
8015			INR	C	Increment reg. C
8016		NEXT	MOV	A, C	Transfer the content of reg. C to Acc.
8017			STA	8056H	Store the content of acc. to the memory location 8506H
8018
8019
801A			HLT		Stop the program execution.