Intel 80C186XL Instruction Set Descriptions, Table C-4.Instruction Set Continued, C-32, Name

INSTRUCTION SET DESCRIPTIONS

Table C-4. Instruction Set (Continued)

Name	Description	Operation	Flags
			Affected
OR	Logical OR:	(dest) ← (dest) or (src)	AF ?
	OR dest,src	(CF) ← 0	CF
		(OF) ← 0	DF –
	Performs the logical "inclusive or" of
			IF –
	the two operands (bytes or words) and
			OF
	returns the result to the destination
			PF
	operand. A bit in the result is set if
			SF
	either or both corresponding bits in the
			TF –
	original operands are set; otherwise
			ZF ¸
	the result bit is cleared.
	Instruction Operands:
	OR reg, reg
	OR reg, mem
	OR mem, reg
	OR accum, immed
	OR reg, immed
	OR mem, immed
OUT	Output:	(dest) ← (src)	AF –
	OUT port, accumulator		CF –
			DF –
	Transfers a byte or a word from the AL
			IF –
	register or the AX register, respec-
			OF –
	tively, to an output port. The port
			PF –
	number may be specified either with
			SF –
	an immediate byte constant, allowing
			TF –
	access to ports numbered 0 through
			ZF –
	255, or with a number previously
	placed in register DX, allowing variable
	access (by changing the value in DX)
	to ports numbered from 0 through
	65,535.
	Instruction Operands:
	OUT immed8, AL
	OUT DX, AX

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-32