Dynabyte 5100 User manual

5100

Computer Unit

Technical Manual

400676

7.

CONTENTS

Fault Location

Power Supply Module Voltages And

Adjustment

Removing Assembl

ies

. .

REFERENCE

S-100

Bus

Schematics and Replaceable Parts

Technical Manual Revisions .

ILLUSTRATIONS

Figure

1-'

-

5100

Computer

Figure

2-1

-

5100

Computer -Front Panel

Table

2-1

-

5100

Computer -

Front

Panel

Controls and Indicators

Figure 2-2A -

5100

Computer -Rear Panel

Figure 2-2B -

5100

Computer-

Rear Panel

Table 2-2 -

5100

Computer -Rear Panel

Controls and Connectors . . . . .

Figure 2-3 -

5100

Computer -Interior

Table 2-3 -

5100

Computer -Interior Major

Assemblies

..........

.

Figure 3-1 -

5100

Computer Functional Block

Diagram

Table

4-1

-

5100

Computer Functional

Specifications

Page 2

PAGE

31

32

37

PAGE

1

4

6

7

10

11

14

17

ILLUSTRATIONS

Table 4-2 -

5100

Computer Physical

Specifications

Figure 5-1 -

5100

Computer Installed In A

Dynabyte Desk Enclosure

Figure 5-2 -Central Processing Unit -Option

Switch Settings . . . . . . . . . .

Figure 5-3 -64K Random Access Memory -

Option Switch Settings

......

.

Figure 5-4 -Disk Controller -Option Switch

Settings

...........

.

Figure

6-1

-Dynabyte Identification Plate .

Figure 6-2 -Power Supply Module Voltage Test

Points -

BS1

. . . . . . . . . . . . .

Table 6-1 -Troubleshooting

Chart.

.

Table 7-1 -Dynabyte S-100 Bus Pin Assignments

Figure 7-1 -

5100

Computer Chassis Wiring

Diagram

..........

. .

Table 7-2 -

5100

Computer Replaceable Parts List

Table 7-3 -

5100

Computer Assembly/Part

Number Cross Reference -Old To Current

. Table 7-4 -

5100

Computer Assembly/Part

Number Cross Reference -Current To Old .

Table 7-5 -

CPU

-Serial and Parallel I/O Pin

Assignments • . . . . . . . . . .

PAGE

20

22

26

27

28

31

35

38

43

44

46

47

48

1.

GENERAL

1.01 This

manual

provides a physical

and

func-

tional

description

and

operating

theory

necessary

for

effective field service

of

the

5100

Computer.

Prior

to

May

1,

19S0,

the

5100

Computer

was designated

the

DBS/1

Computer

and

was

documented

using

an

eight-digit:

part

number

system. This

manual

uses

the

current

Dynabyte

six-digit

part

number

system.

Part

7

includes cross-reference

tables

for

referencing

old

part

numbers

to

current

part

numbers.

Features

1.02

The

5100

Computer,

illustrated

in

Figure 1-1, is supplied individually

or

as a

system

component

to

a larger

Dynabyte

computer

system: Series

5300,

5600,

5700

and

5900.

It

is

an

S-100 Bus

computer

which

includes a

central

processing

unit

(CPU),

random

access

memory

(RAM)

and

input

and

output

(I/O)

ports.

A high degree

of

flexibility

has

been

designed

into

the

5100

Computer

for field servicing

and

provision

for

expansion

to

the

user's

computer

system.

Features

of

the

5100

include

the

following:

•

Z-SO

microprocessor

operating

at

4 MHz.

•

Two

serial,

software

programmable

110

to

76,SOO

baud

ports.

Each

of

the

port's

data

lines

may

be

configured

to

an

RS-232C

level

or

20

mA

current

loop

data

communi-

cation

line interface.

•

One

parallel

port

with

full

handshaking

logic.

•

Application

of

the

ac line

power

causes

the

5100

to

jump

to

a

switch-optioned

starting

address

in

memory.

This

option

is disabled

when

the

5100

is

configured

with

a

5010

Dual

Diskette

Storage

Unit.

•

Ten

internal

timers.

• Sixteen

prioritized

vectored

interrupts.

• A real

time

clock.

400676

• Memory is available in

4SK

or

64K

con-

figurations. Additionally,

optionally

bank

switching

to

400K

bytes

can

also

be

pro-

vided

with

multiple

memory

cards.

•

The

power· supply

module

features

pre-

regulation

to

minimize

operational

problems

.

from

brown

outs

and

line voltage surges.

•

Efficient

cooling

of

the

5100

S-100 cards

and

power

supply

is

assure~

by

a 4-5/S inch

metal

axial

fan(s)

furnishing

air

through

the

chassis

and

exhausted

out

through

the

rear

panel.

•

The

backplane

is shielded

and

fully

socketed

for

12

S-100

card

positions.

• Heavy

duty

metal

construction

with

cast

aluminum

bezels

front

and

rear

is used.

•

The

front

panel switches POWER

and

RESET-HALT are illuminated.

• A line fuse is provided for ac line

protection.

• A

switched

ac

power

outlet

is

provided

for

auxiliary

equipment,

e.g., a

5010

Dual

Diskette

Storage Unit.

• Each

internal

subassembly is

modular

and

is

unit

replaceable

for

ease

in

servicing.

• A

woodgrain

veneer enclosure

top

is

provided.

•

Each

5100

carries a ISO-day

warranty

on

parts

and

labor

from

the

date

of

shipment

.

from

Dynabyte.

• Each

5100

is

burned

in

for

a

minimum

of

72

hours.

1.03

Dynabyte

maintains

hardware

and

software

compatibility

with

Dynabyte

S-100 cards

used

in

the

Dynabyte

S-100 Bus

only.

S-100

I/O

cards, e.g.,

modems,

clocks

and

parallel

ports

from

other

manufacturers

will

be

compatible

with

the

Dynabyte

S-100 Bus

in

most

cases.

Con

tact

Dynabyte

for

specific applications.

Page 3

400676

Figure

2-1

~

5100

Computer -Front Panel -

801387

Table

2-1

-5100 Computer -

Front

Panel Controls and Indicators

Key Element Function

1 POWER

ON

OFF

Applies

the

ac line

to

the

5100

Computer

and

the

ac

power

Switch

and

Indicator

receptacle

on

the

rear

panel.

Refer

to

Figure 2-2, Key

3.

The

indicator

lights

when

+8 V

dc

is available from

the

power

supply.

2 RESET Switch

and

Momentarily grounds

the

S-100 Reset line generating a Power

On

HALT

Indicator

Clear

(PaC)

sequence:

(1) CPU Program

Counter

is reset,

(2) Disk Controller is reset.

When

the

indicator

is

lit,

the

CPU has

stopped

at

a Z-80

HL

T

(76H)

instruction

in

the

program.

Page

4

2. PHYSICAL DESCRIPTION

2.01 The

5100

Computer

illustrated in Figure 1-1

is

an

integrated piece

of

electronic equip-

ment

incorporating all necessary

component

assemblies.

The

principle assemblies are:

(1) Power Supply Module,

(2) Central Processing

Unit

(CPU),

(3) 8-100 Bus Card Cage

and

Motherboard,

(4)

Random

Access Memory (RAM).

Some

of

the

optional

assemblies are:

(5)

Quadraport,

(6)

Octaport,

(7) Disk Controller.

Details

on

these individual assemblies, as well as

their

schematic diagrams

and

replaceable

parts

lists, are furnished

under

separate cover as individual

technical manuals. These assemblies have

been

enclosed in an exceptionally

compact

package

measuring

52

cm

x

47

cm

x

18

cm

(20.5 in. x

18.5

in. x 7

in.)

weighing

25

kg

(about

55

lbs.).

2.02 The

5100

draws nominally

313

VA

of

115

Vac,

60

Hz commercial power.

It

may

be

factory

optioned

for

operation

from a

230

Vac,

50

Hz line.

2.03 The

5100

is designed

to

operate

efficiently

in

an

environment

with

an

ambient

temper-

ature

range

from

10~

C fo 35°C (50°F

to

95°

F)and

with

a relative

humidity

from

20

to

80

per

cent.

2.04 Figures 2-1

through

2-3 provide

number

key callouts

of

all

components

located

on

the

front,

rear

and

interior

of

the

5100.

Associated

Tables 2-1

through

2-3 provide a cross reference

for

each callout, identifying

the

respective

part

as

to

function, description

and/or

designation.

Front

Panel

2.05 Refer

to

Figure 2-1 for

the

description

which follows. The

5100

Computer

Front

Panel has only

two

operating

controls

with

which

the

user should

be

concerned.

400676

(1)

The

POWER ON

OFF

Switch

turns

the

computer

on

and

off. The switch also

connects

the

ac line

power

to

a convenience

receptacle

on

the

rear

panel

for

powering a

mass storage device such as

the

Dynabyte

5010.

The switch also contains

an

indicator

which

lights

when

there

is an

output

from

the

internal

+8 V

dc

power

supply.

IMPORTANT

The

5100

Computer

should

never

be

turned

on

or

off

while

a

diskette

is

installed

in a drive.

(2)

The

RESET

Switch

is

used

to

restart

the

computer

if

it

should

become

locked

up

due

to

a software

or

hardware

malfunction.

Operating

the

RESET

Switch causes

the

S-100

Reset Line, Pin

75,

to

be

active low. The Reset

Line is an

input

to

the

Power

On

Clear (POC)

circuits

and

resets

the

CPU Program Counter,

Disk Controller,

etc.

Then

the

CPU initiates

a

reboot

by

jumping

to

a

starting

address

appropriate

for

the

user's system. The switch

also

contains

an

indicator, which,

when

lit,

indicates

the

CPU has read a

Halt

(HLT)

instruction

and

has

stopped.

Rear Panel

2.06 Figure 2-2A and Figure 2-2B illustrate

Revision A

and

Revision B

of

the

5100

Rear Panel.

The

5100

Computers shipped

after

August

1,

1980,

incorporate

a Revision B Rear

Panel. Table 2-2 tabulates

and

describes each

of

the

rear panel elements. Ac line

and

computer

Input

Output

(I/O)

connections are

through

the

rear panel.

At

the

right,

the

ac line

is

connected

through

an

IEC

connector.

This permits

the

5100

to

be

connected

domestically

to

115

Vac,

60

Hz

with

a National ElectricalManufacturersAssociation

(NEMA)

cord

set

or

internationally

with

a

cord

set

appropriate

for

that

country.

A line fuse

provides

protection

for

the

5100

and

equipment

powered

from

the

ac convenience receptacle above.

CAUTION

Power

consumption

from

the

ac

convenience

receptacle

is

limited

to

200

VA.

Page 5

400676

Figure 2-2A -5100 Computer -Rear

Panel

-Revision A - 802470

Figure 2-2B -5100 Computer -Rear

Panel

-Revision B - 800266

Page

6

Key

1

2

3

4

5

6

7

8

9

10

11

400676

Table 2-2 -

5100

Computer -Rear Panel Controls and Connectors

Element

Ac Line Receptacle

(J6)

Ac Line Fuse

(F1)

SWITCHED AC

OUTLET

Receptacle (J7)

Axial Fan(s)

Dynabyte

Identification

Plate

SERIAL

1

PRINTER

Port

Receptacle

SERIAL

2

TERMINAL

Port

Receptacle

PARALLEL

I/O

Port

Receptacle

FLOPPY DISK

I/O

Receptacle

Hard Disk

I/O

Access

Hole

and

Clamp

I/O

Port

Connector

Area

Function

IEC

standard

three-wire male receptacle. Provides

for

ac line,

neutral

and

a

third

wire

bonded

to

the

chassis frame. Mates

with

Belden P-2392 ac

cord

set

for

U.S.

domestic

use

or

the

appropriate

cord

set

for

the

export

country.

Provides ac line

overcurrent

protection:

(1)

115

Vac - 6 A.

(2)

230

Vac - 3 A.

Early serial

number

units

are provided

with

a

circuit

breaker

in this

position.

NEMA three-wire female receptacle provides

for

the

ac line,

neutral

and

third

wire

bonded

to

the

chassis frame. This

receptacle

is

switched

by

the

POWER ON Switch

on

the

front

panel, refer

to

Figure 2-1,

Key

1,

and

is

protected

by

fuse,

Key

2, above.

This

outlet

normally

supplies

power

to

a

5010

Dual

Diskette

Storage

Unit,

200

VA

maximum.

Provides

for

drawing

heat

from

the

power

supply

module

and

-

internal

heat

dissipating

pc

assemblies.

Furnishes

the

model

and

serial

number

necessary

for

warranty

service.

Refer

to

Figure 6-1.

DB-25-S

connector.

Optionally

EIA

RS-232C

or

20

rnA

current

interface.

Connection

point

for

the

EIA

cable

to

the

Serial Printer.

DB-25-S

connector.

Optionally

EIA

RS-232C

or

20

rnA

current

interface.

Connection

point

for

the

EIA

cable

to

the. Video

Terminal.

DB-25-S

connector.

Eight-bit parallel

I/O

connection

point

to

25-conductor

cable

to

a parallel

printer.

50-conductor

ribbon

connector.

Provides a

connection

point

for

the

cable

to

the

Dynabyte

5010

Dual

Diskette

Storage

for

I/O

data,

control

and

status

lines.

Furnishes a

hole

and

clamp

for

the

cable

to

the

Dynabyte

5012

Cartridge Module Drive.

Provides

positions

for

DB-25-S

connectors.

Figure 2-2 illustrates

connectors

for:

(1) Three

ports

from

the

CPU,

(2) Up

to

16

ports

from

the

Octaport.

Page]

400676

2.07 A four-inch fanes) draws

heat

dissipated

internally

out

the

rear panel.

Air

is drawn

into

the

5100

cabinet

through

louvers provided

in

the

bottom

of

the

cabinet. Refer

to

Figure 2-3.

IMPORTANT

Install

the

5100

Computer

so as

not

to

obstruct

the

air

flow

through

the

louvers

in

the

bottom

of

the

cabinet

and

allow

a three-inch clearance from

the

rear

of

the

fan.

Desk-type system cabinets supplied from

Dynabyte

aredesigned

to

assure

constant

air

flow

through

the

computer.

2.08 Several mass storage devices can

be

used

with

the

5100.

The

rear

panel

furnishes

connector

access

for

these devices.

(1) A fifty-pin

ribbon

cable

connector

provides

for

disk I/O signals,

control

signals

and

status signals

to

a

Dynabyte

5010

Dual Diskette

Storage Unit.

(2) A rectangular hole provides access

for

a

multi-wire

ribbon

cable

for

disk

I/O

signals,

control

and

status

to

a

Dynabyte

5012

Cartridge

Module Drive.

2.09 Eight (sixteen) positions are provided

on

the

rear panel

for

DB-25-S

connectors

and

are used

for

I/O

signals

to

the

system peripheral

devices such as:

(1) Serial Printers,

(2) Video Terminals,

(3) Parallel

I/O

Printers,

(4) Acoustical Coupler

or

Modems,

(5) Plotting Terminals.

Each installation will vary depending

upon

the

selection

of

peripheral devices

and

the

appli-

cations programs in use. Three

I/O

ports

are

furnished as

part

of

the

CPU. These are

shown

connected

to

the

rear panel illustrated

in

Figure 2-2

and

2-3.

In

applications requiring

additional

ports,

a

Quadraport

or

an

Octaport

may

be

installed

Page 8

into

the

8-100 Bus

and

interconnected

to

the

rear

panel.

Both

the

front

and

rear panels

are

secured

to

their

respective bezel

by

6-32 Kep

nuts.

Each bezel is secured

to

the

base

plate

by

6-32

screws.

Both

panel

and

bezel

may

be

easily removed

for

servicing

or

installation

of

additional

I/O

ports

in

the

field.

Card Cage -

S-1OO

Bus

2.10

Refer

to

Figure 2-3

for

the

description

which follows. The card cage furnishes a

rigid

support

structure

for

the

8-100 Bus cards

when

they

are inserted

into

the

8-100 Bus. The

Motherboard PC Assembly contains

12

8-100 Bus

receptacles

or

jacks,

J1

through

J12.

Each

jack

has

100

separate pins. The

actual

bus consists

of

100

parallel traces

on

the

pc

board

connecting

the

same

on

each jack. Each line

has

a

ground

trace

between

it

and

the

adjacent line

to

minimize

coupling between signal lines.

2.11 The 8-100 Bus lines are described

by

function

in

Part

3

of

this manual. Physically

they

make

up

five groups:

(1) Power

and

common

lines. These are con-

nected

to

the

power

supply

module

discussed

in

2.17.

8ix lines.

(2) , Address lines. Six lines.

(3)

Data

In

and

Out

lines.

16

lines.

(4) Control Signal lines.

40

lines.

(5)

Dynabyte

Reserved lines.

22

lines.

The

Motherboard PC Assembly,also contains a few

descrete

components

which

make

up

the

Halt

Detector.

The

Halt

Detector

and

Reset line are

connected

to

the

front

panel

by

a four-conductor

receptacle,

J13,

connected

to

plug,

P13,

mounted

at

the

front

edge

of

the

Motherboard PC Assembly.

S-100 Bus Cards

2.12

Dynabyte

8-100 Bus cards are

pc

assemblies

normally measuring 5 x

10

inches.

A 100-pinedge

connector

mates

with

the

8-100 Bus

connector

on

the

motherboard.

This

connector

is

offset

by

5/8

inch from

the

card

centerline, i.e.,

an

8-100 Bus

card

cannot

be

inserted

into

a

jack

backwards.

2.13

Dynabyte

S-100 Bus cards

may

have

one

or

more

on-board regulators

for

regulating

and

distributing

the

dc

power

supply voltages

from

the

bus

to

the

logical elements

on

the

card.

NOTE

An

S-100

Bus

card

should

never

be

inserted

or

removed

from

the

bus

when

the

ac line

power

is

on.

2.14 A solder

mask

is applied

to

the

component

and

non-component

sides

of

the

pc

boards

when

it

is

manufactured

and

before

it

is loaded

with

components.

This

mask

covers all surfaces

except:

(1) The

100

gold-plated fingers

of

the

edge

connectors,

(2) Each

of

the

plated-through holes.

The solder

mask

assures

there

will

be

no

bridges

between

traces. The soldering

operation

can

then

only

take

place

at

a

hole

where normally solder

joins a

component

lead

and

a pad.

2.15

Dynabyte

S-100 Bus cards usually provide

sockets

for

most

multi-lead active devices

to

facilitate fault location

and

servicing.

2.16 Options for

Dynabyte

S-100 cards are

provided

by

three

methods:

(1) Dual-In-Line packaged (DIP) switches

of

one

to

nine

poles, SPST, are normally used

in

functions which

may

have

to

be

set

to

the

user's individual installation.

IMPORTANT

Never

change

the

settings

of

an

Option

Switch

without

referring

to

the

Option

Switch

Tables

in

the

individual

Dynabyte

S-100

Bus

Card

Technical

Manual.

(2) Bare wire straps are soldered

into

the

pc

board

for

options

which are installed

at

the

factory. These are

not

to

be

changed

in

the

field

except

by

instructions

from

Dynabyte

Customer

400676

Support

or

when specified in

the

individual

Dynabyte

S-100 Bus Card Technical Manual.

(3) Instructions are

written

into

a program-

mable read-only

memory

(PROM)

at

the

Dynabyte

factory resulting in a read-only mem-

ory

(ROM). In some applications a ROM can be

phantomed

into

a desired range

of

addressed

RAM. Phantoming means a

memory

segment

can replace

another

under

program

control.

In

the

5100/5010

configuration,

when

the

5100

is

set

to

POWER

ON

or

RESET

is operated,

the

CPU

jumps

to

the

starting address

of

the

disk

controller

ROM. The ROM

boot

instructions

are overlaid

at

the

common

address location.

These instructions are for

the

CPU

to

read

Track

0,

Sector 1 from Drive A. This particular

operation

is called

the

ROM

Boot.

Track

0,

Sector

1 contains additional

instructions

which

are loaded

into

RAM

and

executed.

These

instructions cause

the

CPU

to

read

the

Dynabyte

Disk Operating System from

the

diskette

or

disk. This second

operation

is

called

the

Disk

Boot.

The ROM is

then

switched

out.

NOTE

Dynabyte

ROMs

are

individually

marked

with

a

Dynabyte

part

number.

The

part

number

represents

an

individual

program

for

a

specific

equipment

configuration.

The

R

OM

part

numbers

are

tabulated

for

various

equipment

configurations

in

the

specific

S-100

Bus

Card

Technical

Manual.

Changes in

options

of

this

type

are

made

by

exchanging

the

particular ROM. ROMs are only

available from

Dynabyte.

2.17

Dynabyte

S-100 Bus cards

carry

a distinc-

tive white silkscreened marking

on

the

component

side

of

the

pc

assembly.

(1) The card name

and

part

number.

This

facilitates

board

identification

and

refer-

encing for reordering, servicing

and

referencing

the

appropriate

Dynabyte

S-100 Card Technical

Manual, schematic

or

replaceable

parts

list.

(2)

Component

reference designators are

marked

when practical.

They

facilitate

locating

the

individual

part

on

a schematic

or

parts

list.

Page 9

Dynabyte 5100 User manual

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