Cromemco ZPU, Z-80A Instruction Manual

CROMEMCO

ZPU

Instruction

Manual

Part

No.

023-0012

CROMEMCO,

280

Mountain

Copyright

Bernardo

View,

INC.

Avenue CA

1978

94040

September

1978

ZPU

INSTRUCTION

MANUAL

Section Section

Section

1:

2:

2.1

2.2

2.3

2.4

2.5

2.6

3:

TABLE

INTRODUCTION

OF

CONTENTS

•••••••••••••••.••••••••••.••••••••

OPERATING INSTRUCTIONS

POWER-ON

Z-80A WAIT ADDRESS

REFRESH ENABLE

ALTAIR

THE

S-100

CLOCK

STATE

MIRROR

OR

JUMP

••••••••••••••••••••••••••••••••••

FREQUENCY

SELECTION

...•.•••...•...•..•.•.......••...

IMSAI INSTALLATION BUS

•.••••••.•••••••••••••••.•••••••••

.•••••••••••••••••.••••••

SELECTION

••••••••••••••••

••••••.••••••••••••••••••••

•••••••••••••••.••.••••

••.•••••

;

••••.•••••

2 3

3

6 7 9

9

10

11

Section

4:

ASSEMBLY

ZPU

PARTS

INSTRUCTIONS

LIST

•••••••••••••••••••••••.•••••••••

••••••••••••.•••••••••••••

19

23

ZPU

INSTRUCTION

MANUAL

This

for

Cromemco's card of

the

100

bus.

detailing

Read

the

ZPU

(ZPU).

Z-80A

into

manual

The

processor Thus, S-100

Section

your

contains

powerful

ZPU

the

manual

bus

features.

2, system

Section

1

INTRODUCTION

is

assembly

4

MHz

designed

to

systems

also

S-100

and

bus

to

bring

using

includes

operating

compatible

the

an

OPERATING INSTRUCTIONS,

S-100

bus.

instructions

power

8080-oriented

extensive

before

Z-80A and

speed

section

inserting

CPU

s-

TECHNICAL

Z-80A

PROCESSOR: 4 MHz version CLOCK

RATE:

INSTRUCTION

POWER-ON JUMP: POWER-ON JUMP

16 locations switch selectable.

2/4

MHz

selectable).

SET:

158 including instructions

the

jumper

LOCATIONS:

(switch

instructions

8080.

SPECIFICATIONS

Microprocessor

of

the

Z-80.

the

78

of

wire

enabled.

WAIT

STATE

o- 4 wait

Ml

WAIT BUS: S-100. POWER

OPERATING

STATE:

REQUIREMENTS:

Card

GENERATION:

statesjum

ENVIRONMENT:

per

jumper

wire

wire selectable.

selectable.

+8 volts @

1.1 A.

0 -

55°C.

ZPU

INSTRUCTION

The

Cromemco

MANUAL

SECTION 2

OPERATING INSTRUCTIONS

ZPU

is

an

S-100

bus

compatible

CPU

(Central

Processing

mi c

roprocesso features power.

MHz

clock systems. board

Ml

wait

other

2.1

POWER-ON

The

designed

Most

states,

features

ZPU

Unit)

r.

importantly,

rate--twice

The

ZPU

state

discussed

JUMP

Power-On

which

The

Cromemco

to

increase

the

offers

generator,

address

Jump

the speed

Power-On

optional

mirroring

in

this

circuitry

uses

Z

PU

your

ZPU

of

section.

the

has

an

total

operates

most Jump

independent

circuitry,

allows

powerful

exc1usive

system

reliably

other

capability,

the

Z-80A

set

computing

at

microcomputer

an

selection

and

board

several

to

of

a 4

on-

of

be

used

(e.

g.,

power

jump

position

setting

in

an

Cromemco

is

turned

to

one-of-sixteen

Jump

The

automatic

is

tabulated

S-100

I s

Address

Z-2,

ON,

bus

jump

below:

system

Z-2D

the

memory

select

address

ZPU

wi

thout

and

SYSTEM

hardware

location

switch.

corresponding

3

front

THREE).

forces

selected

panel

and

with

to

controls

When

automatic

the

each

system

four

switch

ZPU

INSTRUCTION

MANUAL

SWITCH

A15 A14 A13 A12

0 0 0 0 0 0 0

0 0

0

0 0 1 1

1 1 1 1 1

1

1 1 1

0

1 0 0 1 0 1 1 1 1 1 1 0 0 0 0 0

1

0

1 1 B000H

0

0 0

1

0 1 D000H

1 1

1 1 1 1

POWER-ON

JUMP

ADDRESS

0000H

1

0

1000H 2000H 3000H 4000H 5000H

0

6000H 7000H 8000H

1

0

9000H

A000H C000H

0

E000H F000H

Note order set

to

standard System) C3FFH, effect switch

bits

logic

Suppose

with

in provides an

should

the

Jump

in

the

0.

you

a

PROM

automatic

be

Address

jump

have

4FDC

memory.

a

convenient

jump

set

as

address,

a

card

shown

switch

EXAMPLE

Cromemco

and

This

to

program,

location

below:

with

RDOS

way

determines

all

1

Z-2D

(Resident

which

to

start-up

C000H,

the

other

System

resides

the

four

address

Disk

a

Jump

which

Operating

at

system.

highest

bits

comes

C000-

To

Address

4

ZPU

INSTRUCTION

MANUAL

JUMP

ADDRESS

1 0

-zo

c:::::J

.....

CL]N

D:]w

CC~

EXAMPLE 2

14 13 12

15

Suppose

force

Power-On E3FFH,

as

shown

Your

fea

ture

a

jump

or

so

below:

enabled.

you

ZPU

you

to

RESET.

would

is

have

the

To

a

The

then

factory

disable

Cromemco

Z-81O

set

Monitor

the

JUMP

ADDRESS

1 0

-zo

c:::::J

c::::JN

c:::::J

c::c~

shipped

Moni

Jump

.....

w 13

the

Z-2

tor

15 14

12

function

System,

program

spans

Address

with

and

after

addresses

switch

the

(resulting

you

a

Power-On

want

system

to

EIOIOIO-

EIOIOIOH

Jump

in

an

automatic

RESET),

the

board

I f

panel

jump

carefully

labeled

you

controls,

to

address

cut

the

"JUMP

r

com

put

e r s y s t em

the

function

IOIOIOIOH

foil

ENABLE".

trace

has

of

5

only

each

on

a

connecting

RE

SET

of

Power-On

and

these

EXAMINE

two

swi

Clear

points

tches

fro

or

on

n t

is

ZPU

INSTRUCTION

MANUAL

altered

Following

not

at

addresses

Immediatley

twice to actual

in

clear

examine

For

you

can

switch, appear

when

a

address

order the

computers

see

then

in

the

system

specified

after

to

automatic

operation.

how

raising

DATA

the

0000H,

a

examine

the

automatic

RESET,

jump

with

Power-On

the

display.

the

but

with

the

front

RESET

fi

rather

EXAMINE

automatic

and

panel

Jump

switch.

rst

the

a

This

jump

second

works

feature

instruction

at

one

Jump

switch

jump

time

switches

by

The

is

the

of

Address

must

location:

to

and

pressing

number

op

is

enabled.

executed

the

switch.

be

perform

indicators,

the

C3H

code

sixteen

toggled

once

STOP

should

of

is

the

hardware

switch;

the

switch

will

Jump

2.2

Address

Z-80A

The

nsec

cycle

operating

now

all

jump

all order

appear

be

CLOCK

Z-80A

instruction.

0's

8

bits

again;

0's,

switch

FREQUENCY

may

time)

frequency

will

in

and

or

the

bits.

be

2

appear

of

the

MHz

is

the

high

DATA

higher

SELECTION

clocked

(wi

switch

in

jump

order

display.

th

Now

the

address.

8

four

at

ei

a

500

selectable

press

DATA

bits

ther

nesc

bits

display

of

The

4

the

Press

the

lower

will

MHz

cycle

with

EXAMINE NEXT

indicating

the

jump

display

(wi

time).

four

th

the

EXAMINE

address

bits

the

a

250

The

toggle

switch

labeled

"2"

(2

MHz)

and

"4"

6

(4

MHz).

ZPU INSTRUCTION

MANUAL

The

used

by System

labeled products). OFF

for

2.3

WAIT STATE

The

match access

insertion.

the front

2

the

line

"4

MHz

ZPU

time.

previously

ZPU

panel

MHz"

The

operation.

SELECTION

features

Z-80A

The

as

a 4

(i

t

indicator

clock

The

first

labeled

MHz

indicator

may

be

an

ZPU

inserts

indicator

labeled

will

be

on-board

frequency

allows

from

"STACK"

which

ON

two

on

the

line.

The

monitors

"STACK"

for

4

MHz

WAIT STATE

to

your

system's

types

0

to

3

wait

S-100

Cromemco

this

on

non-Cromemco

operation,

generator

of

wait

state

bus

line

memory

state

cycles

is

Z-l

is

and

to

(1

cycle

every

machine

additional

(referred

the

timing

If

in

its

sta

te

select

Wait

state

accomplished

(just

to

=

250

wait

to

requirements

you

are

factory

i

the

nsec

cycle;

states

as

an

using

wired

on

is

selection

by

re-configuring

left

Ml-cycle

done

of

at

the

second

during

are

Cromemco

condition

the

Z-80A

4 MHz;

an

in

the

on

the

to

accomodate

500

type

instruction

the

tightest.

memory

(no

memo

ZPU

chip).

nsec

inserts

Zilog

boards,

wait

ry

board

at

either

fetch

literature),

states);

boards

other

jumpers

2 MHz)

cycle

leave

if

boards

one

your

all

requi

Ml

during

or

only

where

ZPU

wait

red.

and

no

is

W

7

Cromemco ZPU, Z-80A Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual