Mostek z80 - Buffer Module Description

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1.5

BUFFER

MODULE

The

Buffer

module

is

located

near

the

Target

system

and

contains

the

Target

Z810

microprocessor,

Target

adaptor

connector

and

interface

buffers.

cables

connect

the

Buffer

module

to

the

Control

and

History

modules

which

are

installed

in

the

development

system.

'I'he

Target

adapter

connector

is

attached

to

the

Buffer

module

with

eighteen

inches

of

flat

cable

and

plugs

directly

into

the

'rarget

Z810

CPU

socket.

There

are

five

test

sockets

available

on

the

edge

of

the

of

the

Buffer

module

with

the

following

signals.

rfEST

POINtf

SIGNAL

BLUE

FETCH

(Ml

for

first

opcode

of

instruction)

GREEN

PHI

(Z80

clock)

YELLCM

SHAM

(Active

when

Emulation

RAM

is

accessed)

RED

+5

VOLTS

BLACK

GND

The

signal

SHAM

is

an

active

high

signal

which becomes

active

when

the

I1nulation

RAM

is

accessed.

'rhis

si<.jnal may

be

used

to

reverse

the

direction

of

buffers

in

the

Target

system

so

that

RETI

(Return

from

Interupt)

instructions

executed

from

the

Einulation

RA!Vl

can

be

recognized

by

the

Target

system.

There

are

also

two

sets

of

nine

probes

designated

the

A and B which

plug

into

the

upper

left

corner

of

the

Buffer

module.

The

probes

are

color

coded

with

standard

EIA

color

codes

as

follows:

10

BLACK

1

BROtJN

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Other manuals for Mostek z80

Technical Manual28 pages