Intel 80C186XL, 80C188XL user manual Increment, String, INS dest-string, port

INSTRUCTION SET DESCRIPTIONS

Table C-4. Instruction Set (Continued)

Name	Description	Operation	Flags
			Affected
INC	Increment:	(dest) ← (dest) + 1	AF
	INC dest		CF –
			DF –
	Adds one to the destination operand.
			IF –
	The operand may be byte or a word
			OF
	and is treated as an unsigned binary
			PF
	number (see AAA and DAA).
			SF
	Instruction Operands:
			TF –
	INC reg		ZF ¸
	INC mem
INS	In String:	(dest) ← (src)	AF –
	INS dest-string, port		CF –
			DF –
	Performs block input from an I/O port
			IF –
	to memory. The port address is placed
			OF –
	in the DX register. The memory
			PF –
	address is placed in the DI register.
			SF –
	This instruction uses the ES register
			TF –
	(which cannot be overridden). After the
			ZF –
	data transfer takes place, the DI
	register increments or decrements,
	depending on the value of the direction
	flag (DF). The DI register changes by 1
	for byte transfers or 2 for word
	transfers.
	Instruction Operands:
	INS dest-string, port
	INS (repeat) dest-string, port

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-18