beautypg.com

Outa output direct to port address (byte) – Zilog Z80380 User Manual

Page 159

background image

5-125

Z380

U

SER

'

S

M

ANUAL

Z

ILOG

DC-8297-03

OUTA

OUTPUT DIRECT TO PORT ADDRESS (BYTE)

OUT (nn),A

Operation:

(nn)

A

The byte of data from the accumulator is loaded into the selected peripheral. During the
I/O transaction, the peripheral address from the instruction is placed on the address bus.
Any bytes of address not specified in the instruction are driven on the address lines are all
zeros.

Flags:

S:

Unaffected

Z:

Unaffected

H:

Unaffected

V:

Unaffected

N:

Unaffected

C:

Unaffected

Addressing

Execute

Mode

Syntax

Instruction Format

Time

Note

OUTA (nn),A

11101101 11010011 -n(low)- -n(high)

2+o

I