Ohio scientific Superboard ii User manual

SUPERBOARDrr

KIT

ASSEMBLY

MANUAL

MIA-COM

OSI

April,

1982

NOTE

The

Superboard

II

is

a sophistocated microcomputer, a very

delicate

piece of

electonic

hardware.

Assembly

of

this

kit

should only

be

attempted

by

individuals

experienced with

electronic

assembly

and

test

techniques.

Ohi

0 Sci

entifi

c

1333

S.

Chillicothe

Rd.

Aurora,

Ohio

44202

Printed in the United

States

of

America

Copyright

1982

Ohio

Scientific

All

Rights Reserved

TABLE

OF

CONTENTS

Overview

Warranty

Assembly

Introduction ..................................

Stage I Socket

and

Low

Profile

Parts

Insta

11

ati

on

Part 1 Steps 1-7 .........................

Part

2 Steps 8-11 ........................

Part 3 Steps 12-16 ·

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

Part 4 Steps 17-24 •

••••••••••

• e .

•••••••••

•

Part 5 Steps 25-31 ·......................

Stage

II

Keyboard

Assembly

Part 1 Steps 32-36 ·......................

Stage

III

Assembly

and

Testing

of

Video

Ci

rcuit

1 - 2

3

4 -7

8

-21

22-26

27-35

36-45

46-55

56-65

Part 1 Steps 37-41

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

66-78

Stage

IV

Final

Assembly

and

Test

Part

1 Steps 42-44

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

79-84

Part 2 Step

45

Step

46

Part 3

Appendices 1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

II.

12.

Superboard

II

and

C1P

Documentation

....

.

Parts

Bags

--

Cross Reference

.........

.

Trouble Shooting Chart

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

.

External Storage of

Programs

...........

.

Vi

deo

Memory

Maps

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

.

Character Graphics

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

.

BASIC-;n-ROM

Error

Codes

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

. .

Memory

Map

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

.

Pi

nouts

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

.

Legend

Superboard

II

Schematic

........

.

Superboard

II

Schematic

..........

.

.....

.

Parts

List

and

Description

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

.

85-86

87-90

91

92-100

101

102-103

104

105-111

112

113

114

115

116-121

122-123

OVERVIEW

Your

OSI

Superboard,

when

completed,

is

a

powerful,

versatile

8K

computer.

The

video

display

is

an

easy

to

read

24

character

by

24

line

format

which

features

both

upper

and

lower

case

letters

directly

from

the

keyboard.

In

addition,

there

are

numerous

non

alpha-numeric

graphics

characters

which,

together

with

the

standard

text

characters,

make

up

a

set

of

255

characters.

The

Superboard

connects

directly

to

a

video

monitor

(or

standard

TV

set

by

way

of

an

RF

modulator)

and

to

a

cassette

player.

With

a

substitution

of

connections

at

the

rear

edge

Molex

socket,

the

Superboard

can

be

used

with

a

serial

printer

or

a modem

as

well

as

with

the

cassette

player.

The

addition

of

a

610

I/O

board

will

give

you

memory

expansion

'

capabiiity

up

to

32K

arid

the

possibility

of

adding

one

or

two

minifloppy

disk

drives.

Before

beginning

the

assembly,

you

should

read

through

this

entire

assembly

manual

in

order

to

get

in

mind

the

total

picture

of

the

project.

Do

not

rush

the the

assembly.

Care

and

frequent

checking

of

your

work

will

payoff

in

the

long

run.

Assembly

will

take

about

20-25

hours.

1

MATERIAL

REQUIREMENTS

For

Assembly

For

Use

Good

quality

soldering iron

(25

watt with 1/16" plated

tip)

Rosin

core solder

(supplied with

kit)

Needle

nose

pliers

Side

cutters

(diagonal

cutters)

Screwdriver

Solder Sucker (or solder braid)

Csotch tape

AC/DC

VOM

multimeter

Logic

probe (useful

for

testing

but not required)

5 Volt

DC,

3

Amp

power

supply

regulation -

better

than

4%

ripple

-

less

than

4%

The

addition of a

610

will require

an

additional

power

supply -

total

6

amps.

Video

monitor (or

B&W

TV

with

RF

modulator*)

Portable

cassette

recorder (used

on

AC)

Small

speaker (useful with

DAC

but not required)

*ATV

Research Microverter

recommended

2

051

LIMITED 30-DAY

WARRANTY

The

OSI

warranty

is

a

Limited

Warranty

as

defined

by

the

u.s.

Consumer

Product

Warranty

and

Federal

Trade

Commission

Act.

This

warranty

entitles

you

to

certain

legal

rights

although

the

details

vary

from

state

to

state.

Covered

Parts:

OSI

will

replace

factory

defective

parts

for

a

period

of

30

days

from

date

of

purchase.

Replacement

parts

are

warranted

to

be

free

from

defects

for

the

balance

of

the

original

warranty

period.

Replacement

parts

are

obtained

by

calling

(216)

562-2020

and

asking

for

the

Superboard

Kit

Department.

(8-5

EST

Monday-Friday)

Not

Covered:

The

warranty

specifically

does

not

cover

assembly

errors,

damage

caused

by

negligence

or

abuse.

Use

of

unauthorized

parts,

modifi-

cations

or

corrosive

solder

voids

this

warranty

completely.

Warranty

does

not

cover

inconven-

iences,

loss

of

use,

assembly

or

set

up

time,

unauthorized

service.

NOTE:

OSI

cannot

accept

collect

calls.

Customer

Information:

OSI

will

not

service

kits

which

have

not

been

completed.

Malfunctions

involving

non-OSI

peripherals

(monitors,

tape

recorders,

etc.)

are

the

customer's

responsibility.

Returns:

Repair

Fee:

Software:

The

customer

must

obtain

a

Return

Authorization

(RA)

number

before

returning

any

item

to

051.

Please

call

(216)

562-2020

and

ask

for

Super-

board

Kit

Department.

Shipping

damage

is

not

covered

by

this

warranty.

A

standard

repair

fee

will

be

charged

on

all

Superboard

Kits

returned

to

OSlo

The

standard

fee

is

$50.

OSI

reserves

the

right

to

repair

or

Replace

at

our

discretion.

The

customer will

pay

the

shipping to

OSI

and

OS!

will

pay

the

return

shipping

Software

is

specifically

not warranted.

3

ASSEMBLY

INTRODUCTION

Befare

yau

start

to.

maunt

the

parts

an

the

circuit

-

baard,

it

will

be

helpful

far

yau

to.

became

familiar

with

what

functians

the

variaus

sectians

af

the

baard

will

perfarm.

Pasitian

the

baard

in

frant

af

yau

with

the

"Ohio.

Scientific

Madel

600

CPU"

label

side

up

and

with

the

natch

in

the

upper

right

carner.

In

this

pasitian,

the

lang

edge

af

the

baard

will

extend

away

fram

yau.

This

is

the

arientatian

which

is

shawn

in

Figure

1-1.

Far

the

purpase

af

insuring

that

the

baard

is

ariented

carrectly

far

each

step

af

assembly,

the

edge

farthest

fram

yau

has

been

labeled

N

far

Narth.

As

yau

can

see

fram

Figure

1-1,

the

keybaard

sectian

af

the

ciruit

baard

is

clasest

to.

yau

while

the

Input/Output

(I/O)

sectian

is

at

the

upper

left.

The

RAM

chips

will

be

lacated

at

the

upper

right

'

with

the

RAM

chip

select

circuit

campanents

just

belaw.

Just

abave

the

keybaard

an

the

right

is

the

circuitry

far

decading

the

signals

fram

the

keybaard.

To.

the

left

abave

the

keybaard

sectian

are

the

ROM

chips

which

cantain

the

pragrams

necessary

far

yaur

camputer

to.

functian

as

it

daes.

Abave

the

ROM

chips

is

the

circuitry

far

selecting

ROM

addresses.

Finally,

the

heart

and

saul

af

yaur

Superbaard,

the

6502

micrapracessar,

is

lacated

in

the

center

abave

the

keyboard.

Figure

1-2

is

a

detailed

diagram

af

the

superbaard

campanent

layout.

The

rectangles

in

the

tap

twa-thirds

af

the

diagram

are

the

individual

IC

chips.

The

cades

an

these

chips

(U8,

U9,

UIO,

...

etc.)

will

be

used

in

the

manual

to.

refer

to.

particular

chips.

These

same

cades

are

used

in

the

camplete

Superbaard

schematics*

faund

at

the

end

af

this

manual.

Yau

will

nate

that,

with

same

exceptians,

the

numbers

start

law

at

the

sauth-east

partian

af

the

baard

and

increase

as

yau

mave

west

and

narth.

The

pasitians

af

the

resistars,

capacitars,

and

diades

are

marked

with

a

shape

which

carrespands

raughly

to.

the

physical

farm

af

the

circuit

element.

The

letters

R,

C,

and

D

specify

resistar,

capacitar,

ar

diade.

The

numbering

system

is

the

same

as

that

far

the

,

IC

chips.

As

yau

camplete

each

step,

check

aff

the

apprapriate

bax

in

the

sequence

af

steps.

**

*

See

Appendix

**Important points

and

warnings will

be

outlined

with a

box

for

emphasis.

4

Your

Superboard II Kit Contains

Bag

A Capacitors

Bag

B Chips, Diodes

and

Transistors

Bag

C Resistors

and

Pots

Bag

D Misc. Hardware, Sockets

and

Solder

Bag

E

Keyboard

Parts

Bag

F Chips

Bag

G Miscellaneous

Bag

H Chips

Superboard

II

Bare

circuit

board

Superboard II Kit

Assembly

Manual

Cassette tapes (two,

one

test

and

one

blank)

5

56 Pieces

31

58

108

110

27

3

37

430

Total

I/O

Section

ROM

Select

ROM

N

o

LO

\0

Keyboard

Area

Figure

I-I

6

RAM

Select

Keyboard

Decoding

SUPERBOARD

KIT

BOARD

LAYOUT

DIAGRAM

Figure

1-2

7

STAGE

I:

Low-Profile

Parts

Installation

The

first

stage

in

assembling

the

Superboard

kit

consists

of

soldering

the

Ie

sockets

and

other

low-profile

parts

(diodes,

resistors,

etc.)

to

the

board.

Most

of

the

soldering

involved

in

the

project

will

be

done

during

this

stage.

You

will

also

do

some

preliminary

testing.

There

are

many

diagrams

to

assist

you

in

properly

locating

components

on

the

board.

However,

be

sure

to

double

check

the

position

and

orientation

of

each

part

before

soldering.

Stage I assembly

is

divided

into

five parts as described

on

the

fol-

lowing

pages.

8

I.

STAGE

I,

Part

One:

Socket

Installation

Parts

List

(These

parts

will

be

found

in

Bag

D

and/or

in

plastic

tubes

marked

"0".)

Part

Number

Quantity

Description

check:

( )

SC-14FI

16

14

IC

socket

SC-16FI

25

16

IC

socket

SC-lSFI

IS

IC

socket

SC-24FI

7 24

IC

socket

SC-40FI

2 40

IC

socket

Note:

It

is

a

good

idea

to

find

and

check

each

part

on

the

list

at

this

time.

This

will

save

time

and

help

to

avoid

mistakes

when

the

various

parts

are

called

for

in

the

assembly

steps.

9

16

IC

socket

(the

24

and

40

sockets

have

rectangular

openings

be~ween

the

rows

of

pins)

Socket

Installation

Notes

The

Ie

sockets

have

small

semicircular

cutouts

at

one

end

that

are

used

to

orient

them

properly

on

the

board:

Pins

are

numbered

sequentially

counter-

clockwise

1

cutout

With

one

exception

(noted

in

assembly

STEP

2),

the

sockets

will

be

properly

oriented

when

the

cutout

faces

south

relative

to

the

north

edge

of

the

board.

Within

each

section

of

the

board

the

largest

sockets

should

be

installed

and

soldered

first.

These

should

be

followed

by

the

size

and

so

on

until

all

the

indicated

sockets

have

been

installed.

The

installation

of

a

socket

requires

three

steps:

1)

put

the

socket

in

the

board

checking

the

orientation

of

the

cutout

(or

notch

indicating

one).

2)

turn

the

board

over

and

bend

two

of

the

pins

on

opposite

corners

to

temporarily

secure

the

socket.

3)

verify

that

the

socket

is

installed

in

the

correct

location

and

solder

the

pins.

When

several

sockets

the

same

size

are

to

be

installed,

the

above

three

steps

can

be

carried

out

simultaneously

for

all

of

the

sockets

in

a

given

area.

10

/

STEP

)

A.

Install

and

solder

18-pin

IC

sockets

(SC-18FI)

count:

16

Note: For best

results,

use the

solder

included with your

kit.

Note:

Check

the appropriate

box

in

the

columns

to the

left

as

you

complete

each step to

keep

track of your A

progress.

A

curOUT

FACES

A

1 t<

~

A

TO

THE

RIGHT

(SOUTH)

A

11

N

il!!!!!!!!I!I!!

.

(detail

location)

A

(detail)

STEP 2

) A.

Install

and

solder

24-pin

IC

sockets

(SC-24FI)

count:

I

( )

B.

Install

and

solder

18-pin

IC

sockets

(SC-18FI)

count:

"2-

( )

C.

Install

and

solder

16-pin

IC

sockets

(SC-16FI)

count:

~

( )

D.

Install

and

solder

14-pin

IC

sockets

(SC-14FI)

count:

3

-

J1t~OUT

FACES

C

UP

(EAST)

ON A

CUTOUT

FACES

l4 rf{

TO

THE

RIGHT

(SOUTH)

ON

B,C,O

I

N

1II1111111i

12

STEP

3

)

A.

( )

B.

Install

and

solder

16_pin

IC

sockets

(SC-16FI)

count:

6

Install

and

solder

14-pin

IC

so~kets

(SC-14FI)

count:

3

CUTOUT

FACES

TO

l

THE RIGHT

KEEP

YOUR

SOLDERING

IRON

TIP

CLEANt

4

tC

(SOUTH)

J

N

II

A

8

13

()

Test

Procedure

1 -

Perform

after

Step

3

Purpose

-

Check

for

shorts

resulting

from

solder

bridges.

(Solder

bridges

are

unlikely

to

occur

since

most

of

the

reverse

side

of

the

printed

circuit

board

is

masked

with

a

green

plastic

film.)

Equipment

Required

-

Ohmmeter

with

probes

~

Procedure

-

Locate

socket

U31

(upper

right

hand

corner

in

Step

1).

Use

an

Ohmmeter

to

check

the

following

combinations:

1

to

Pins

2,

3,

4 thru Pin

18

2

to

Pins

3,

4 thru Pin

18

3

to

Pins

4 thru Pin

18

.

(continue)

;

17

to

18

All

of

these

combinations

should

indicate

an

open

circuit.

Remedy

-

If

any

combination

indicates

a

completed

circuit,

inspect

the

reverse

side

of

the

printed

c i

rcuit

board

for

solder

bridges

and

remove

excess

solder

(either

with

a

solder

sucker

or

desoldering

braid)

.

NOTE

-

Although

the

test

procedure

seems

to

be

testing

only

U3l,

you

are

actually

testing

for

short

circuits

in

all

of

the

installed

sockets

because

of

inter

con-

nections

with

U31.

14

( )

STEP

4

A.

Install

and

solder

B•

16

-p

in

IC

s

SC-16FI)

socket

(

count:6

Install

and

solder

IC

socket

(

14-pin

7 s

SC-14FI)

count:

CUTOUT

FACES

TO

THE RIG

HT

(SOUTH)

-

I I

I

N

I11111111111111

-

15

STEP 5

)

A.

Install

and

solder

40-pin

IC

socket

(SC-40FI)

count:

I

( ) B.

Install

and

solder

24-pin

IC

sockets

(SC-24FI)

count:

6 A

B

CUTOUT

FAC

ES

i

~

4 8

TO

THE

RIGHT (SOUTH)

B

J

N I

M

;

""l~:t!!~

~

~"""

•

•...

t·:·:

·:

.:.:

• ;:;:

;·

··1

1·

··

.1

;:;:

::..:.

:.:

.

:.

:

.:.

·

.:;:

;:

....

•

ii.lf(iI:f

...·• •

.:

.•.,...

...

:

.J

....

=--,

-

__

'~.~~!!f:

.

~~:

...

.;

..

.

:

.:.

~?

16

STEP

6

( )

A.

( )

B.

Install

and

solder

40-pin

IC

socket

(SC-40FI)

count:

1

Install

and

solder

*

16-pin

IC

sockets

(SC-16FI)

count:

4

( )

C.

Install

and

solder

14-pin

IC

sockets

(SC-14FI)

count:

2

*Note: These sockets

are

only pop-

ulated

when

a

610

I/O

Expander A

Board

is

attached

to

the Superboard.

CUTOUT

FACES

g/

8

i 4

TO THE

RIGHT

(SOUTH)

C

8

17

N

I

~111.1.llllllll

8

C

Ohio Scientific Superboard II User manual

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