|
| |
Output to Port
|
86/88 |
Y |
186 |
Y |
286 |
Y |
386 |
Y |
486 |
Y |
OUT port, accumulator |
|
Ovfl |
N |
Dir |
N |
Int |
N |
Trap |
N |
Sign |
N |
Zero |
N |
Aux |
N |
Prty |
N |
Carry |
N |
OUT transfers a byte or a word from AL or AX to the specified port.
The port may be specified with an immediate byte constant (allowing
access to ports 0 through 255) or with a word value in DX (allowing
access to ports 0 through 65,535).
Note: It is advised that hardware not use I/O ports F8h
through FFh, since these are reserved for
controlling the math coprocessor and future
processor extensions.
------------------------------------ Timing ----------------------------------
OpCode Instruction 386 286 86
E6 ib OUT imm8, AL 10 3 10
E7 ib OUT imm8, AX 10 3 10
E7 ib OUT imm8, EAX 10
EE OUT DX, AL 5 3 8
EF OUT DX, AX 5 3 8
EF OUT DX, EAX 5
------------------------------------ Logic -----------------------------------
(Port) = accumulator
See Also IN OUTS INS |