Intel 80C186XL User Manual download pdf (Page 355)

100

101

INSTRUCTION SET DESCRIPTIONS

C-32

OR Logical OR:

dest,src

Performs the logical "inclusive or" of

the two operands (bytes or words) and

returns the result to the destination

operand. A bit in the result is set if

either or both corresponding bits in the

original operands are set; otherwise

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

(dest) ← (dest) or (src)

(CF) ← 0

(OF) ← 0

AF ?

DF –

IF –

TF –

OUT Output:

OUT

port, accumulator

Transfers a byte or a word from the AL

tively, to an output port. The port

number may be specified either with

an immediate byte constant, allowing

access to ports numbered 0 through

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

(dest) ← (src) AF –

CF –

DF –

IF –

OF –

PF –

SF –

TF –

ZF –

Table C-4. Instruction Set (Continued)

Name Description Operation

Flags

Affected

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

1 2 ... 350 351 352 353 354 355 356 357 358 359 360 ... 404 405

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Intel 80C186XL User Manual Page 355

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