Intel 80C188XL Instruction Set Descriptions, Table C-4.Instruction Set Continued, JO disp8

		INSTRUCTION SET DESCRIPTIONS
	Table C-4. Instruction Set (Continued)
Name	Description	Operation	Flags
			Affected
JO	Jump on Overflow:	if	AF –
	JO disp8	(OF) = 1	CF –
		then	DF –
	Transfers control to the target location
		(IP) ← (IP) + disp8 (sign-ext to 16 bits)	IF –
	if the tested condition (OF = 1) is true.
			OF –
	Instruction Operands:
			PF –
	JO short-label		SF –
			TF –
			ZF –
JP	Jump on Parity:	if	AF –
JPE	Jump on Parity Equal:	(PF) = 1	CF –
	JP disp8	then	DF –
		(IP) ← (IP) + disp8 (sign-ext to 16 bits)	IF –
	JPE disp8
			OF –
	Transfers control to the target location
			PF –
	if the tested condition (PF = 1) is true.
			SF –
	Instruction Format:
			TF –
	JP short-label		ZF –
	JPE short-label
JS	Jump on Sign:	if	AF –
	JS disp8	(SF) = 1	CF –
		then	DF –
	Transfers control to the target location
		(IP) ← (IP) + disp8 (sign-ext to 16 bits)	IF –
	if the tested condition (SF = 1) is true.
			OF –
	Instruction Format:
			PF –
	JS short-label		SF –
			TF –
			ZF –
LAHF	Load Register AH From Flags:	(AH) ← (SF):(ZF):X:(AF):X:(PF):X:(CF)	AF –
	LAHF		CF –
			DF –
	Copies SF, ZF, AF, PF and CF (the
			IF –
	8080/8085 flags) into bits 7, 6, 4, 2 and
			OF –
	0, respectively, of register AH. The
			PF –
	content of bits 5, 3, and 1 are
			SF –
	undefined. LAHF is provided primarily
			TF –
	for converting 8080/8085 assembly
			ZF –
	language programs to run on an 8086
	or 8088.
	Instruction Operands:
	none

NOTE: The three symbols used in the Flags Affected column are defined as follows:

–the contents of the flag remain unchanged after the instruction is executed ¸? the contents of the flag is undefined after the instruction is executed

the flag is updated after the instruction is executed

C-25