ZiLOG Z8 Technical Manual

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LDEI

dst,src

"'-

Instruction

for.at:

OPC

OPC

Operation:

flags:

Example:

LDEI

Load External Data Autoincrement

I

I

dst

I

I

src

dst

<--

src

r

<--

r + 1

rr

<--

rr

+

Cycles

src

1B

dst

1B

OPC

Address

Mode

(Hex)

dst

orc

B3

Ir

Irr

93

Irt

Ir

This

instruction

is

used

for

block

transfers

of

data

between

external

data

memory

and

the

register

file.

The

address

of

the

external

data-memory

location

is

specified

by

a

working-register

pair,

and

the

address

of

the

register

file

location

is

specified

by

a working

register.

The

contents

of

the

source

location

are

loaded

into

the

destination

location.

Both

addresses

are

then

incremented

automatically.

The

contents

of

the

source

are

not

affected.

No

flags

affected

If

the

working-register

pair

6-7

contains

%404A,

working

register

2

contains

%22

(34

decimal),

and

registers

34-35

contain

%ABC3,

the

statement

lDEI

ORR6,9R2

loads

the

value

%AB

into

external

location

%404A.

A second

lDEI

BRR6,BR2

loads

the

value

%C3

into

external

location

%404B.

5-31

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ZiLOG Z8 Specifications

General

Brand	ZiLOG
Model	Z8
Category	Desktop
Language	English

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