Hal Communications MCEM-8080 Technical Manual

MCEM-BOBO

MIC

OCOMPUTER

SYSTEM

HAL

MCEM-8080

MICROCOMPUTER

SYSTEM

TECHNICAL

MANUAL

*************************************************************

WARRANTY

The

HAL

Communications Corp. guaranteed of

one

HAL

Communications

the

factory

return HAL

Communications assumes no

ment

of

installed

this

equipment

into

existing

supply

warranty.

against

year.

authorization.

parts

voltages

or

t

Should

for

repair

or modified

without

units.

(as

units

defects torp.

repair

or

which have been damagedt abusedt improperly and

incurring

Operation

described

MCEM-8080

in

materials

or

replacement

promptly.

adjustment

responsibility

reserves

of

in

Microcomputer System

and workmanship

Please

until

the

right

obligation

this

equipment

this

manual)

parts do you have

be

not

for

the

to

change

to

incorporate

with

will

return

is

fully

for a period

requiredt notify

your

received a written

repair

the

improper

invalidate

unit

or design

such

the

replace-

changes power

to

of

**************************************************************

Copyright

in

the publication sion

of

~

United

the

1976

may copyright

by

States

not

HAL

Communications

of

America.

be

reproduced

owner.

All

in any form

April,

Corp.t

rights

1976

Urbana,

reserved.

without

Printing

Illinois.

Contents

th~

written

Printed

of

this

permis-

CONTENTS:

MCEM-8080

MICROCOMPUTER

SYSTEM

I.

2.

3.

4.

SYSTEM

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.S Connectors used INSTALLATION

2.1

2.2

2.3

2.4

2.5

2.6 OPERATION

3.1

3.2 SYSTEM

4.1

4.2

4.3

COMPONENTS. SOSOA

Processor Random

Read Serial

Parallel Bus

Initial

Connection Connection

Connection

I/O Connector Pin Assignments

Universal

Software Monitor

ADDRESS Random

Read

Input/Output

Microprocessor

Access

Only

Indicators

OF

THE

Access

On

. . Control Memory

Input/Output

Data

THE

MCEM-SOSO

Installation

of of

of Processor MCEM-SOSO

Monitor

Subroutines ASSIGNMENTS

1 y

Memory

(I/O)

.....

...

Circuitry.

Memory

Input/Output.

and Control

Serial Power

Parallel

Memory

...•

..•..•

(I/O) .

on

the

MCEM-SOSO

.....

......

Input/Output

Supplies

I/O Devices

Bus

..

.•..

(RAM)

(ROM).

Assignments.

Connector

• . . .

. .

..

.

to

.•

•• .

.

Devices.

the

MCEM.

..

1-1 1-1

1-2 1-2

1-3 1-3

1-5 2-1

2-1 2-1 2-9 2-9

2-10 2-12

3-1 3-1

3-5

. 4-1

4-1 4-1

4-2

5.

OPERATING

5.1 Power-on

5.2

5.3

5.4

5.5

5.6

5.7

6.

PROGRAM SOFTWARE

7.

8.

9.

CIRCUIT

APPENDiCES A.

B.

C. D.

HINTS

Changing Manually

Manually Jumping

~anual1y

Using Using

EXAMPLES

MONITOR

BOARD

PROM,

Input/Output

Addition S080A

.......•.

Start the

Monitor

Writing a Memory Writing

the

Break-point

the

E and R

. LISTINGS.

LAYOUT

.......•.............

EPROM,

of

Assembly Language Coding

AND

ROM Jumper Connections

INTREQ,

Up

. . . . . .

Mode

Location.

to

a Program Address

to

an Output

Register

Commands

SCHEMATIC

Connections and

RESIN,

Port

..

for

Debugging.

DIAGRAMS

Markings.

..•..

and

BUS

EN

Forms

...•.

Debug.

..

to

..

the

~

UPB

.

..

.

5-1 5-1

5-2 5-3

5-3 5-4 5-4 5-4

6-1 7-1 S-l 9-1

9-1 9-6

9-10 9-12

i i

TABLES:

Table

Table Table

Table

ILLUSTRATIONS:

Figure Figure

Figure

Figure Figure

Figure Figure Figure Figure

2.1

2.2

2.3

2.4

2.5

2.6

1. I

2. I

2.2

2.3 ?4

2.5

8.1

8.2

8.3

8.4

8.5 A.

A.2 A.3 A.4

B.l B.2 B.3

C.

ASCI I Character Baudot

Oscillator Power

I/O

Universal

MCEM-8080 EIA

Dual Single

Bit Bit

MCEM-8080 Schematic

MCEM-8080 MCEM-8080

MCEM-8080

I

Memory Memory

Memory PROM

EIA Dual

Single

1

Addition

Character

Requirements

Connections

- RS-232C current

current

assignment assignment

jumpers jumpers

jumpers

color

- RS-232C current

current

Code

Code. .

Frequency

and

.••.......

Processor

Microcomputer

Serial

loop

circuit drawing

CPU Processor

Input/Output

coding.

loop

of

RESIN,

serial

loop

and

timing

and

timing

board

conventions

Interface

for

3624-4

for

8704

for

8708

Serial

serial

loop

BUSEN,

•.

and

Period.

Connections

Bus

Connections.

System

I/O

(standard I/O

serial

Memory

I/O Jumper

serial

I/O

for for

layout

/

Control.

. . •

Interface

PROMs.

EPROM or

8308

.

....

I/O Jumper

and

..

..•

..

parallel parallel

.•

.•.•

...•

ROMs Locations.

INTREQ

jumpers).

output.

input

Locations.

to

UPB

•.•.

2-2 2-3 2-5

2-9

2-10

2-12

iv

2-6 2-7

2-8

2 -11 2 -11

8-2 8-3

8-4 8-5

8-6

9-2

9-3

9-4

9-5

9-7

9-8

9-9 9-11

iii

INTRODUCTION

The

HAL

MCEM-8080 board control single

MCEM-8080 and Memory

put

Video with MCEM-BOBO manuals

two Microcomputer Systems

and

system

relating

detail

Corporation).

to

in Intel

furnished ment.

computer

that

applications.

chip,

control

(RAM)

(I/O)

Display

the

The

publications:

specifications

are

in

8-bit,

printed

circuitry.

integrated

interfacing.

unit,

basic

MCEM

board -

furnished

MCEM-8080A

discussed

to

the

8080A and

the

Intel

circuit

the

with

this pertaining

When

the the

detailed

form:

discussions

"Intel;

8080 Assembly Language

with

the

MCEM-8080

Microcomputer

can

be

used

The

MCEM-8080

N-channel

microprocessor

board

both

Read Only circuitry, Other

tape

circuit

cassette

accessories

board.

operation

each

unit.

Microcomputer

MCEM-8080

User1s

Manual.

to

in

the

MCEM-8080

associated 8080 pertinent,

Microcomputer Systems

references

in

the

pp

A-xx

to

Reference

Microcomputer System

for

System

program

is

is a single

development

designed

integrated

contains

and

the

Memory

timing

microprocessor

(ROM)

and

such

memory, and power

This

manual

of

the

accessories

System manual Operating

Manual, and

Specific

the

HAL

Communications Corp.

Operating

integrated

are

made

Intel

A-yy". In

manual.

Card

addition,

(©

printed-circuit

or

for

around

the

Intel

circuit.

IC,-

and

Random

control

as

additional

suppl

discusses

is

actually

operating

for

ies

ONLY

discussed

supplied

the

Intel

instructions

Manual. General circuits

User's

in

These

is

discussed

Manual

the

operating

referen~es

a copy

Intel

Corporation)

to

aid

in program

specific

8080A The

its

timing

Access

Input / Out-

RAM,

can be

Keyboard/

the

basic

in

separate

used

in

8080

MCEM-8080

information

(©

Intel

manual

are

of

the

is

develop-

in

given

Figure

1. I

MCEM-8080

iv

Microcomputer

System

I.

and

SYSTEM

The

HAL

optional

COMPONENTS

MCEM-8080 components:

Microcomputer System

contains

the

following

basic

1.1 8080A The 8080A

an

instruction

these

circuit address

discussion manual

1.2

808oA

processor

Generator

1.2.1

8080A

buffers

interrupt

instructions

itself Input / Output

(Intel~.

Processor Two

to

8228

A

type

and

the

Microprocessor

is

an

repertoire

varies

contains

of

the

8080A

pp

2-1

Control

additional

provide

system.

IC.

generate

(RST

Bus

Controller 8228 8080A

7).

all

These

integrated

data

eight

of

all

(I/O)

will

to

2-20).

Circuitry

integrated

of

the

are

the

required

bus

bit

microprocessor

73

instructions.

from

2.0

of

the

devices,

be found in

circuits

timing

the

8228

(Intel;

circuit

bus

signals

~sec.

circuitry

and

pp

control

and

Bus

5-7

is

to

manipulate

pages

are

control

Controller

to used will

integrated

The

execution

9.0

~sec.

required

2-1

to

used

to signals. support a single

in

signals

5-12)

decode

circuit

The 8080A

to

address

data.

2-20

conjunction

for

IC

and

signals This

time

A more

of

the

micro-'

the

from

device

vector

with

of

integrated the

memory,

detailed

Intel

with 8224

the Clock

the

also

1.2.2 A

An

18

timing

J.3

Random

The

Access

the

lower circuit RAM

can be

RAM

All access

they

may 8102A-4 pp

5-79

Within

occupy "IK"

The

bytes

software

8224 type

MHz

crystal

signals,

standard

Memory

64

board

installed

integrated

time

cause

is

found

to

5-82).

locations

of

Clock 8224

power-on

Access

(RAM).

bytes

space

of

450

improper

the

processor

RAM

monitor

Generator

integrated

is

used

Memory

MCEM

circuit

This

are

required

is

provided

on circuits nsec.

on

pages

between 0 and 1023 (0 -

occupy

uses

(Intel;

circuit

with

reset

the

or

operation

locations

the signal

memory

MCEM

should

less.

5-79

memory

RAM

locations

board

through

pp generates

device

and

is

can be

for

the

so

that

board

be

Slower

of

the

space,

between 1024 and 2047 (400 H -

5-1

to

5-6) all

to

generate

ready

provided

used software an

(factory

type

system.

5-82

the

3FF

between 0 and

by additional 8102A-4, a

RAM

devices

of

the

standard

- Hex). The

system

the

line

synchronization

with monitor

installation

the

user's

Further

Intel

"IK"

1024

device

should

manual

63

timing

2.0

bytes

program.

bytes

information

bytes

second

(0 -

signals.

MHz

of

programs,

is

recommended). featuring NOT

(Intel;

of

3F

processor

pulses.

Random

but

Additional

("lK")

be

(optional)

7FF

H).

of

an

used

on

RAM

H).

as

the

1-1

1.4

Read

Only

The

MCEM

4096

bytes

of

bi-polar

device Four

socket

same

type

starting

of

selection

(EPROM

at

1.4. I EPROM

Memory

system EPROM

PROM

(Programmable

is

locations

or

32,768

is

provided

(Erasable

made

are

by

provided

PROM).

(8000 H).

with

Programmable

Read

Only

selection

for

The

ROM

occupies

sufficient

Read

Memory -NOT

of

the

proper

the

ROM -all

consecutive

circuit

Only

board

Memory)

erasable).

circuit

four

memory

space

or

board

must be

for

2048

bytes The jumpers. of

the

locations,

Either a type

5-50) can be

the

8704

is

ment.

1.

4.2

PROM

Type 3624

is

the

standard

PROM

with

MCEM-8080

jumpered to

use

1.4.3

used in Refer

1.4.4

l-83Q8

with

location

a 512 x 8 circuit

for

other

ROM

A

type

the

to

Appendix A

Monitor

The

HAL

ROM

the

MCEM. 32,768

8708

used

on

a 512 x 8

PROM

device

board.

use

of

devices,

8308

HAL

ROM

MCEM-8080.

Software

software

integrated

The

(8000 H).

or

8704

the

MCEM

board.

device.

integrated

furnished

organization.

NOTE:

this

device

refer

to

integrated

This

for

jumper

ROM

monitor

can be

circuits.

monitor

software

EPROM

integrated

The

Refer

circuits

with

'

Up

to

Appendix A

can be used the to

Production

on

the

circuit

Appendix A

circuit

is

a mask-programmed

details.

resident

Either

is

2-3624

1024

circuit

8708

is

a 1024 x 8

for

on

MCEM.

four

The

3624

36241s can be used on

MCEM-8080

board.

for

details.

(Inte~;

pp

in

or

bytes

5-59 & 5-60)

either

1-8308

in

(Intel;

proper

the

MCEM.

is a bi-polar

circuit

If

it

version

2-3624,

ROM

length

pp

device

jumper

boards

is

desired

can

of

the

1-8708,

is

standard

and

begins

5-45

and

This

the

also

to

place-

IC

are

be

8708.

or at

1.5

serial

I/O

1.5.1

Serial The

data

in

either 8251

A

type

Input

standard

interface.

Baudot USART 8251

Synchronous/Asynchronous

output

the

well

serial

processor.

as

word

data.

Parallel-to-serial

length

/ Output MCEM-8080

The

(5-unit)

integrated

Receiver/Transmitter

This

selection

(I/O)

provides

software

or

circuit

device

and

ASCII

is

parity

1-2

for

either

monitor

(8-unit)

(Intel;

fully

and

serial-to-parallel

pp

programmable and

are

synchronous

supports

codes.

5-135

(USART)

controlled

or

asynchronous

to

5-146)

is

used

Universal

to

is

controlled

conversions

by

the

8251.

serial

input

and

by

as

1.5.2

Serial

Timing

Oscillator

A

type

555

integrated

circuit

timer

is

used

to

generate

the

serial

data

baud

rate.

The

data

rate

is

screw-driver

adjustable

on

the

circuit

board.

The

actual

555

clock

frequency

is 4 times

the

baud

rate

in

ASCI

I

mode

and

16

times

the

baud

rate

in

Baudot mode.

1.5.3

EIA

- RS-232C Data

Interface

Two

operational

ampl

ifiers

(both

halves

of a type

145B

Ie)

are

used

as

RS-232

drivers

and

receivers.

The

serial

output

of

the

B251

USART

is

directly

converted

to

a ± 5

volt

signal,

with

-5

volts

representing

the

"mark"

signal

condition

and

+5

volts

as

"space".

The

output

impedance

of

the

circuit

is

approximately

400 ohms. For

input

data,

an

operational

amplifier

is

used

as a sense

ampl

ifier

and

level

converter.

Input

voltages

greater

than

+1.0

volts

are

interpreted

to

be in

the

"space

ll

condition

and

those

less

than

+1.0

volts

as

"mark".

The

input

impedance

is

approximately

2700 ohms.

This

input

will

property

sense

TTL-level

signals,

as

well

as

EIA

- RS-232C

signals.

1.5.4

Current

Loop

Interface

Current

loop

signals

with

either

20

or

60

ma

mark

currents

can

also

be

connected

to

the

MCEM-BoBO.

Two

optical

isolator

integrated

circuits

are

~sed

to

convert

between

the

floating

cur~ent

loop

circuit

and

the

RS-232

levels.

These

sensors

are

separated

so

that

one

can

be

used

for

data

input

and

the

other

for

output

(separate

current

loops -"full-

duplex"

operation).

The two

circuits

can

also

be

series

connected

to

provide

both

data

input

and

output

on a single

current

loop

circuit

("half-duplex"

operation).

1.6

Parallel

Data

Input / Output

A

type

8255

integrated

circuit

(Intel;

pp

5-113

to

5-133)

is

provided

to

allow

parallel

data

interfacing.

This

device,

called

the

"Programmable

Peripheral

Interface

ll

,

consists

of

three

buffered

B-bit

parallel

data

ports.

The

software

monitor

util

izes

the

8255

for

parallel

I/O

operations.

1.7

Bus

Indicators

and

Control

A number

of

indicators

(small

LEOs -Light

Emitting

Diodes)

and

switches

are

installed

along

the

front

edge

of

the

MCEM-BoBo

circuit

board

to

permit

evaluation

and

control

of

the

processor

operation.

1.7.1

Address

Indicators

The

entire

16

bits

of

the

BOBo

address

bus

are

displayed

on

16

LEDs.

The lamps

are

grouped

in

four-lamp

clusters,

four

clusters

total.

Each

group

of

four

lamps

represents

a

single

hexadecimal

(HEX)

character,

0

through

F.

An

illuminated

lamp

indicates

a

logic

"I"

condition.

Within a four-lamp

cluster,

the

least

significant

bit

(LSB)

is

represented

by

the

right-hand

lamp.

Similarly,

the

right-hand

cluster

of

four

lamps

represents

the

least

significant

hexidecimal

character.

1-3

1.7.2

Data

Indication

Eight

state

of and an

1.7.3

the to-right

which of

1.7.4

of

the

address

illuminated

Bus

The

four

state

order)

of

these

signals

Manual Data

of

Immediately

sectio~

contents

when

is

not

the

1.7.5

miniature

the

in

the

affect

lamps,

Run / Stop

of

Data

ON

lamps

processor

lamps.

Control

lamps on

the

signals

operations

the

data

Bus

position.

the

processor.

LSB

to

(in

two

four-lamp data As

lamp

bus.

before,

represents

Indication

the

extreme

I/O Read, I/O

from

is

found in

Switches

in

front

of

switches.

bus.

Override

The

These

(DBa)

data

The

the

right.

Switch

Write,

the

processor.

active.

the

Intel

the

eight

The

switches switches switch switch

switches

clusters)

These

the

right-hand

a

logical

left

Memory

A

manual

data

are

lamps

end

are

11111

of

Read, and

An

complete

(Intel;

lamps provide can

be used

(to

the

settings

are

arranged

used

to

immediately

lamp

represents

for

that

the

circuit

illuminated

description

pp

are

located

manual

to

right

at

of

any

in

indicate

bit.

board

Memory

5-7

control enter the

other

the

same manner

to

Write

lamp

of

to

two,

data

time

the the the

indicate indicates

the

5-12).

four-

of

data

switches)

does

left LSB

(left-

function

the

only

as

A

miniature

(labeled

this

switch

operate

STOP switches

1.7.6

(unless

position,

will

Reset

The contact causes

type

the

cleared.

is

released.

function.

1.7.7

allows

switch

Single

The

manual only

STEP

RUN -STOP that

some than

one

operation

toggle

RUN -STOP)

is

set

halted

the

cause

Switch

far

right-hand that

can

program

Processor

Appl

ication

Step

switch stepping

functions

switch

or

instructions

switch

allows

to

the

by

processor

push-button

be used

counter

execution

of

Switch

(located

of

when

the

break

require

of

step

manual

RUN

position,

the

program

is

activity.

to

set commences

DC

between

the

computer,

the

switch

on

the

control

or

halted

switch

manually

to

zero

power

processor point

more

register.

than

to

complete.

right-hand

of

the

processor

some

and

only

(labeled

reset

and

at

location

supplies

the

RUN -STOP

one

MEMORY

has

been

one

memory

section

the

8080A

will

other

the

control). manual

RESET)

the

808oA.

the

interrupt

0000

automatically

and

cycle

halted

It

is

important

cycle

of

the

board

Ready

line.

continue

When

STEP

and

is

a momentary

A

reset

flip-flop

when

the

issues

RESET

switches)

at a time.

by

either

to

and

therefore

When

to

in

the

RESET

operation

to

reset

a

reset

This

the

remember

be

switch

more

1-4

1.7.8 In

four, point

four-section registerl•.

register

two

are

808oA

is continue setting

Break

the

with

equal.

halted

running

the

Point

middle

the

This due

break

Register of

the

miniature

Circuitry address

function

to a break

by

either

point

Switches

control

switches.

is

bus and

is

manual

switches

area

provided

cause

similar

point

Ilmatchll,

stepping

to a new

of

the

circuit

These to

the

16

switches

compare

8080A

the

to

to a programmable

it

can

with

the

STEP

value.

board

value

stop

only

are

form

a.

of

operation

stop.

be

caused

switch

located

"break

this

switch

if

Once

to

or

by

the the

re-

1.7.9

Memory

Two

circuit functions.

when

depressed,

circuit. output

1.8

write

Connectors There

These

to

wi

1.8.1

connectors

the

th

the

Universal

I/O

Input / Output

circuit

located

8255

are

The form

Write

momentary

board.

The

Similarly,

function,

are

MCEM.

Interface

board

on

edge

the

available of

serial

and

switches

These

switches

MEMORY

overriding

depression

used on

three

connectors

are

used

Processor

Connector

(I/O)

connector

left

edge

on

this

data

Output

are

WRITE

switch

the

again

the

MCEM-8080

overriding

for

Bus. Mating

connections

(0.156

of

the

connector

to

be

Write

Switches

located

allow

manual

will

normal bus

of

the

used

on

I/O

Interface,

11

finger

board.

as

used

is

on

the

operation

cause

control

OUTPUT

the

normal

the

basic

connectors

to

the

spacing,

All

three

well

selected

far a manual

from

WRITE

control

MCEM-8080

Power

for

MCEM

are parallel

as

connections

with

left-hand

of

memory

the

switch

Input,

and

each

made

18

circuit

side

or

write

8228 will

from

integrated

cause

the

circuit

connection

are

furnished

through

double

I/O

ports

for

serial

board

of

the

output

function

an

8228.

board.

a 36

readout)

of

the

data.

jumpers.

1.8.2

connector upper

and +5

1.8.3

can

located

and

of

is

Power

right-hand

volt

Universal

Direct

be made

in

attached

options made

through

Connector

connections

(0.156

11

finger

corner

power

supplies.

~rocessor

connection

through

the

lower

ribbon

such

as

the

to

the

spacing 6 pin

of

to

the

40

right-hand

cable

are

additional

UPB

connector.

MCEM

the

Bus

computer

supplied

memory

are

made double

circuit

board.

Connector

address,

Universal

corner

of for

and

1-5

through

readout)

The

data,

Processor

the

board.

use

of

this

the

Keyboard/Video

the

located

MCEM

and

Bus

(UPB)

A

feature.

12

edge

in

requires

±

control 1 ines

connector

mating

connector

Connection

Display

the

12

volt

unit

2.

INSTALLATION

OF

THE

MCEM-8080

2.1

and damage packing

The

2.2

with

for

Initial

Upon

receipt

inspect

is

found,

material,

If

any

are

missing,

following

Accessories

40

of

36 12

MCEM

Intel Intel

Connection

The

MCEM-BoBo

(Input/Output)

Baudot code

circuit

the

ASCI I code.

Inspection

of

the

them

at a variety

for

contact

check

parts

and

Universal

ribbon pin

edge

Operating

BoBo B080

of

Serial standard

operations

board

jumpers.

evidence

please and

Parts:

cable

Microcomputer System Assembly Language

MCEM-BoBO,

of

the

carrier

that

all

notify

accessories

Processor

attached.

connector connector

Manual

Input / Output

circuitry

in

either

of

baud

The

unpack

shipping parts

the

are

the

rates.

MCEM-BoBo

damage.

'immediately.

and

factory

furnished

Bus

(UPB)

Reference

Devices,

and

software

7-unit

The

the

circuit

If

Before

accessories

or

distributor

with

connector

User's

code

is

Manual Card

will

ASCI

to

usually

I code

board and

evidence

discarding

are

accounted

the

MCEM-BoBo:

with 2 ft.

support

OR

be used

factory

accessories

of

shipping

in

writing.

serial

the

5-unit

is

selected

connected

the for.

I/O

2.2.1

(circuit

ASCI format.

600 baud. The second).

output

a values.

and

The

I mode.

II

The

list

periods

ASCII

ASCI I mode number 15,

all

This

serial

As

baud

the

Common

s

data parity

stoE bits

rate

are

I

7

I

2

of

Serial

format

tar.t

unit

noted

ASCI I character

serial

bit

bits

bit

bits

per

baud

in

(ego.

ASCII

listed

I/O

Operation

is

selected

left

edge

communications

is:

(space)

(set

(mark)

character

rate

is

factory

section

16

baud

in

by

of

space)

to

timing

adjusted

1.5.2,

x 300 =

set

rates

Table

2.3.

strapping

board)

is

screw

the

4Boo used and

and

the

to

ground

performed

driver

for

300 baud (30

555

timer

Hz

for

300

their

corresponding

.

22

(DSR)

(see

with a 7-bit

adjustable

is

baud).

corresponding

of

Appendix B). In

from 100

characters

set

to

Table

oscillator

the

B251

ASCII

per

16

ti.mes

2.1

contains

hexadecimal

frequencies

to

the

2-1

Table

2. I

ASC

II

Character

Code

III

.....

co

.....

C

III

U

4-

c

CJ)

V>

.....

III

III C1l

-.oJ

-'T

0

2 3

4

5

6

7

8

9

A

B C D

E

0

NUL SOH STX

ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO

DLE DCI DC2

DC3

Dc4 NAK SYN

ETB

CAN

EM SUB

ESC

FS

GS

RS

3

Most

2

SPACE

II

#

$

%

&

(

)

it\.

+

Significant

Bits

3

0

2

3

4

5

4

@

A

B

5

P

Q

R C S c s D T d

E

U e

6 F V f

7

8

9

G W g w

H X h x

Y y

J

Z j

K

<

L \

M m

>

N

A

6

a q

b

k

n

7

P

r

t

u v

z

{

}

'V

ACK BEL

BS CAN

CR DCI DC2 DC3

DC4 DLE EM ENQ EOT ESC ETB ETX

FF

F

SI

acknowledge

bell backspace

cancel carriage

device

=

device device device data 1 ink end

of WRU = enquiry end

of

=

escape

end

of

end

of

=

form feed

US

return control control control

control

1

2

3

4

escape

medium

transmission transmiss

ion

text

/

block

Mark

Data

=

logical

j s

transmitted

?

FS

GS HT

LF NAK NUL RS RUB OUT S I SO SOH STX SUB SYN US VT

1

0

file group

horizontal

line negative nu

11

=

record delete shift

=

shift

=

start start

substitute synchronous

unit vertical

LSB

first.

a

separator

tabulation

feed

acknowledge

separator

(=

DEL)

in

out of

heading

of

text

idle

separator

tabu 1

RUB OUT

at

ion

2-2

Table

2.2

Baudot

Character

Code

Most

Significant

Bit

(1)

Letters

Figures

0 0

0

BLANK

T

BLANK

5

E

Z

3

+

2

LF

L

LF

)

3

A

W

2

III

4

SPACE

H

SPACE

#

~

co

5

S Y

6

~

6

P

8

0

e

ttl

U

7

u

Q

7

<l-

e

8

CR

OJ

0

CR

9

In

9

D

B

$

7

.j...I

A

R

G

4

&

III

ttl

CIl

B

J

FIG

BEL

FIG

...J

~

C

N

M

D

F

X

/

E

C

V =

F

K

LTR

BEL

=

be

11

(or

"')

BLANK = blank

(non

print

or

space)

CR

=

carriage

return

FIG

figures

case

LTR

letters

case

LF

=

line

feed

Mark

=

logical

I

Data

is

transmitted.

LSB

first.

2-3

circuit

board.

REVERSED

2.6

Universal

The

ribbon

The

cable

total

external

and

control 1 ines

The

connections

THE

(particularly

Processor

processor

attached

length

loads

of

should

and

to

MCEM-8080

if

connected

Bus

bus

of

the

to

the

this

cable

not

exceed

5,

LOW

the

UPB

CAN

BE

Connector

8080A

Universal

should

three

CURRENT,

connector

DAMAGED

to

high-voltage

can be

extended

Processor

not

exceed

standard

bus

receiver

are

shown

IF

THE

Bus 24

TTL

in

I/O

current

with

(UPB) inches. loads

loads

Table

CONNECTOR

loop

a 40

circuits).

conductor

connector.

The

total

on

the

address

on

the

data

2.6.

IS

lines.

Function

Al2

2

+12 A10

3 4

+5

A8

5 6 Ground

A6

7

Ground

8

A0

9

10

02

(TTL)

Table

2.6

Universal

15 16 17 18 19 20 21

2Z

23 24

Processor

Function Al MEMR A3

I/O R

A5

I/O W

A7

RESET A9

RDY

Connections

Bus

Pin 29 30 31 32 33

34 35

36 37

38

Function AI4

(NC) A15 Locating DB0

DB4 DBI DB5

DB2

DB6

Key

II

J 2

13 14

Note:

A2

(NC) A4 MEMW

Connections

but

not

connected

with

the

on

25 26 27

28

(NC)

the

2-12

A

II

(NC)

A13

(NC)

designator

factory

may

standard

have a

units.

39 40

function

DB3 DB7

assigned

3.

OPERATION

OF

THE

MCEM-8080

3.1

Software

Monitor

The

software

monitor

supplied

with

the

MCEM-8080

properly

interfaces

the

serial

I/O

port,

the

parallel

I/O

ports,

the

keyboard

display

option,

or

other

user-defined

I/O

devices.

The

monitor

allows

the

user

to

perform

the

following

operations.

These commands

are

entered

from

the

console.

3.1.1

Load

hex

(hexidecimal)

files.

Large

files

can

be

loaded

into

the

MCEM-8080

RAM

from

the

reader

device

by

using

the

following

format:

I~

~~3~

r 3[57.

·rl-_·

._._23

__

T

__

:~~:H;~:LD

RECORD

TYPE

L------------LOAD

ADDRESS

L..-

_____________

RECORD

LENGTH

L---------------COLON

COLON:

All

records

must

start

with a COLON

character.

Any

characters

preceding

the

COLON

are

ignored.

RECORD

LENGTH:

The

number

of

load

bytes

in

the

data

field

is

specified

as

a number between

00

and

FF

(0

to

255).

This

is

a hexadecimal number and

is

either

two

characters

long

or a single

character

followed

by a comma

(i.e.,

07 = 7,).

If a zero

length

record

is

entered,

the

load

is

terminated

and

control

is

restored

to

the

mon i tor.

LOAD

ADDRESS:

The

memory

location.

into

which

the

first

byte

of

the

data

field

will

be

written

is

specified

here.

Successive

bytes

in

the

data

field

will

be

written

into

successively

higher

memory

locations.

This

number

is

either

four

characters

long

or

less

if

terminated

with

a

comma

(i.e.,

032E =

32E,).

RECORD

TYPE:

The

record

type

is

specified

here.

With

the

present

version

of

the

monitor

(Version

1.1),

all

records

are

of

type

zero

(enter

00).

DATA

FIELD:

The

actual

data

to

be

written

into

memory

is

specified

here.

These

are

two

character

hex

bytes

and

each

pair

of

characters

is

converted

to

eight

bits

to

be

loaded

into

memory.

3-1

SUMCHECK:

The

format

This

hex

(the

load

SUMCHECK

all

of

the

zero.

SUMCHECK

output

if

used

the

to

L 0 t

This device.

SUMCHECK

byte

represents

address

value

fails,

specify

is

other

is a validity

an

However, fails.

is

such

bytes

··X"

a

load

two

bytes)

that,

of will

the

file

the

negative

when

the

record,

check

be

data

is:

in

the

modulo 256

on

the

printed

will

sum

record.

the

total

record.

on

the

still

of

all

The

is

added will

serial

be

loaded

bytes

If

to

equal

the

After

the

3.1.2 The

range command

format

10

H) inserted input

The

dumped

. D

L----------L

L-----------------Prompting

receIvIng

first

Dump

contents

to

be dumped. The

so

of

until

between

so

th~t

that

the

file

or

Idump

the

colon. Display

of memory entire

the

dumped

is

300 , 400

p<-------carr

~-------Load

portion

other hex

this

command,

memory

is

in

various

sent

~

areas

can

output

a number

range

file

to

the

be

generated

can

first

is

depleted.

bytes

is

compatible

punch

of

i

age

offset

of

than

characters,

indicates

the

monitor

dumped

be

hex

records

but

the

device.

Return

(added

the that

load

peri9d

will

(or

displayed)

is

compatible

dumped

For

monitor

with

The

(CR)

to

hex

records

specified,

0000

issued

begin

and

(of

clarity,

ignores

the

command

the

load

-

FFFF)

by

searching

by

with

then

maximum

load

loaded.

spaces

spaces file format

address

to

load

memory

up

to

four

the

monitor

specifying

the

load

The

length

are

on

routine.

is:

for

the

=

T

..

T...

I

L--~--------First

L-------------------Comma

~---------------------First

<------------------------0

~--------------------------Monitor

This

example

between

length

locations

record

is

always

TL-----Carriage

command

300

H

to

added

will

400

cause

H - 1

at

3-2

(Dump)

the

Return

undumped separator

dumped

command

prompting

display as

16,

end.

of

16

byte

all

byte

(CR)

period

memory

records.

contents

A

zero

3.1.3

Insert

Memory

Data

Individual

The

command

The

After

and

when

location

data

For

has been

example,

locations

format

82E

T

'--------------1

~---------------Monitor

output

82E

is:

t

TL----Carriage

generated

=

27

~pcesent

'-------------Space

~--------------Address

this

has

been

done,

unchanged,

written

any

entered,

consider:

in

memory

Starting

(Insert)

is

of

Equals

output,

into

memory.

non-comma

the

address

prompting

the

memocy

sign

character

a

comma

charqcter

is

can be

Return

memory

following

If

modified

address

command

contents

is

it

incremented

(CR)

period

format:

typed

is

desired

can be

by

using

followed

to

typed.

and

displayed

this

by a new

leave

After

command.

the

memory

the

again.

byte

new

I f any

character,

3.1.4

JUMP subroutine.

JUMP

Program command.

. I 82E

82E

=

27 , 2E

(Insert

----~--~Il['-----New

L

_______

'----------------Response

82F

character

control

Command

87

control

This

The

format

between

returns

can

command

for

to

be

can be used

Comma

(Computer

the

monitor.

transferred this

command:

memory

data

(entered

by

response

location)

IIZII

is

to a specific to

"jump"

command,

by

user)

computer

typed

instead

to a user

generated

user)

indicating

of

location

contents

a hex

through

program

by

user)

of

the

or

3-3

· J

23

}.

T

T~------carr

iage

Return

(CR)

3.1.5

Program

CPU

registers

command.

Twelve

~-----------------JUMP

L--------------------Prompting

RETURN

Register

command

control

restored

The

format

R

283

T

L---------------RETURN

L-------------------Prompting

register

t

TL----'

------

can be

to a predetermined

of

this

-

values

Destination

command

transferred

command

Carriage Destination

are

restored

address

period

to a specific

value

is:

Return

address

command

period

by

this

issued

by

executing

(CR)

issued

command

Stored Memory

by

monitor

location

by

monitor

including:

at

location

and

a

RETURN

the

PC SP

The using These process

(SPH & SPl)

a

is

3.1.6

expecting

val

zero,

an I

locations

of

id

RAM

STOP

A

STOP

B

C

D

E

A

PSW

H

l

(PCH

PCl (low

(SPH

SPl

initial.

(Insert)

restoring

is

address.

the

destination

command

a

control

(Accumulator) (Processor

(high (high

(low

are

used

order order

value

command shown in

the

as

can be character

order order

(to

temporary

If

Status

program

stack

be

restored)

to

the

registers, the

destination

is

taken

initiated

by

Word)

counter)

pointer)

memory

above

the

storage

from

at

typing

of

location

list.

stack

and address

the

storage

any an

IISII

these

Note area

therefore

time

(or

37

36

35 34

33 32

31

30

2F

2E 2D

2C

registers

used that, indicated

SP

specified

area.

at

which

any

other

can be

for

during

should

in

the

storage.

the

by

SP

contain

the

monitor

letter

set

by

command

is

between

3-4

"G" and

to

be

then

issue a new

"Z").

aborted

As

explained

and

control

prompting

in

is

returned

period.

section

3.1.4,

to

the

this

will

mon i tor.

cause

The

the

mon i tor

command

wi

11

3.1.7

a an command status saves

From registers

initial

EXIT

command

An

exit

RST 7 instruction

entry

at

is

intended

while

the

PC

here,

it

into a special

RST 7 instruction

EXIT

A

prompting

I

(Insert)

The

memory

RETURN

command

location

command.

The most

a

RST 7 (0FF

automatic

to

the

be

executed

exit

program

from a program

or a CALL

38

H from which

to

permit

in

the

process

(Program

jumps

Counter)

to a routine

RAM

is

232E

period

valuable

H)

instruction

will

sequence.

(hexadecimal)

is

then

can

be used

used

to

use

be

executed.

An

since a RST 7 is

to

the

38

it

saves

the

of

executing

on

area.

typed

issued

to

store

of

the

in

the

interrupt

used

monitor

H.

The

monitor,

ALL

CPU

examination

a

the

stack

within

out

by

When

as:

the

finished,

monitor.

examine the

register

exii

command

program

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the

interrupt

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registers

of

program.

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and/or

values

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command

also

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all

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which

the

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change

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turn-on,

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registers

RST 7 instruction

to

location

copies

address

this

point,

38

all

of

individual

is

listed

under

by

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inserting

being de-bugged and an

can be used

cause

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to

command

vector.

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and

H.

registers.

the

return

to

3.2

Monitor

Sever~1

monitor.

3.2.1

initial

3.2.2

BEGIN

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i s izes

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3.2.3

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ASCII

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purpose

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8000

H)

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genera I entrance

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input

routine the

console The

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the reader

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of

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as

input

standard.

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that

contents

stack

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CI

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return

device the

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in

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software

mon i tor

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place

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registers

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H)

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of

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character

console

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standard

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the

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input

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device

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code

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status

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return

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an

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modified

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CO

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to

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list

output

format.

request device an

input

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character

if a character

to

CI

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three

subroutine

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device.

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input,

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stack

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contents

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serial

value

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devices:

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memory

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devices

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return

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of

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PO

by

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8251 MCEM-KB/VDU

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8255 Programmable

40 H): A

character

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H):

A

which

in

used

to

define

available

CO,

CSTS

to

anyone

of

USART

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user

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in

the A register,

subroutine,

will

allow

subroutine

the C register.

the

four

are:

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following

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similar

output

input

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in

to

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46 will

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user

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return a character

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return a character.

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may

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assigned

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to

data

serial

code

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available

board / Video play

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the

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data

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parallel

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monitor

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turn-on

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monitor

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assigns

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assigns

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the

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memory

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contents

6

into

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of

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contents

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memory

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the

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5

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system

into

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locations

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how

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3-8

4.

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SYSTEM

The

MCEM-8080

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ports,

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discussed

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below.

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4.1.1

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4.1.2

program

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section

Input),

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Monitor

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locations

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stack

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to

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locations

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into

free

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memory MCEM-8080

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interference

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higher

monitor

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software space

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4.3.1

one The

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the fourth

Input / Output

Various

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8251

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output

control

input / output

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Unit

USART

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port

IC

for

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H.

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IC directly port

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Assignments

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ports

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four

output

the

three

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PROM

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port

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parallel

mode

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8255

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three

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option.

ports;

output

the

IC

ports.

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IC,

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port

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MCEM-8080

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input

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Three

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the

8255

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4.3.3

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4.3.4

input

the

8080A

Input Input

Input

Output Output

NOTE

:

MCEM-KB/VDU

The

optional

two

input

the

Keyboard / Video

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MCEM-7K

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optional

ports.

PROM

Programmer manual

ports.

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H

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H

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H

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H

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H

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PROM

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8255

Port Port

Port Port A output

Port B output Port

8255

Input

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port

Display

assigned

Unit

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808oA

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input

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input input

C

output

Mode

manual

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H.

Unit

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8080A

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four

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ports

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81, 82, and

on

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three

83.

port

6.

on

See

4-3

5.

OPERATING

Much

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computer examples

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BUS

DATA

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;CISPLAY/DUMP?

___

~C.Sl.---L2

73

e a _IN

..... Z __

-----'M''-Al.L'>N<--

__

;.J\U

__

£AIL.CllM.M.AN-,-C...,-

.L-..LI-",R'-lY~A""-",G""ALIL.N,,,-

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COMM~ND

SERVICE

ROUTI~ES

.

~~

..

------------------.--?------------~--,-.-.-------

..

,-.------------.-------~---.--.---

..

-.------------------~_.,-----_.,_

..

_--_.

__

._--.,--._-

DISFLAY

(DUMP)

MEMU~Y

TO

SEnIAL

OUTPUT

THE

FeRMAT

UF

THIS

DUMP

IS

COMPATIBLE

8080

NAC~C

ASSEMOLER.

VER

2.2

MCcN-8080

MO~ITOR

1.1

Er.RORS

= 0

PAGE

7

WITH

ThE

LOAD

(...,EX)

RCliTlf\E

ECS.A

CD1C83

CAl.L

E:XPf.{

;(['T

2

~ARAMETERS

-------------l:

C

<,;

C----

0

1--

------------------

PUp---o

----------;

~

U T

--

< E

f\

C > - 1 N

DL

...

_.

-------.---.-----------------

8C<;E

E1

POP

h

;FUT

<START>

IN

I-L

eCSF

DISPl:

;LI~E

C~TPUT

LOOP

START

EC<,;F

70

MOV

A.L

;LC~eYTE

OF CURRENT

POINTER

---------<80

,.\.I.f----C-6-1-.vO---------AD

I

16·----·.;

EN

C-Tt:

S-T--AUu

R

E-S-S---.----------------------

ECA2

47

MOV

B.A

;GOES

INTO

(ebl(

)

SO~3

7C

MOV

A,H

;...,IG"" GYTE OF

CURRENT

POINTER

ECA4

CECO

ACI

0

;AD~

CARHY OF

PPEVIGUS

ADI

16

----------80A6-,----4F

r40v---.,-C-t-A;

(CO

)=(HL-H--lo----.-----------------------

seA7

CA7380

JC

MAIN

;EXIT

IF

WRAP

AROUND

eCAA

78MOV

A.E

;LOw

EYTE

OF

<ENC)

BOA£:

SC

SUO B

;E-(2+1(;)

------oCAC

47---_

MnV_~i.A

..;SAvE--DISPL,ACEMENT"""nlo6~

__________________

_

BOAD

7A

MOV

A,D

;t-IGt-

GYTE

OF

(ENC>

BOAt:

SS

SCB C

;D-C-CY

OF

[-(L+16)

BOAF

02E980

JNC

-

DISP5

;SKI~

IF

)15

LE~T

C

CD2-2S

MOV_-------A.B;

LPC

AT.£-.nE.CCR~EM;.I.H'-------..,..-------------

Boe3

C610

ADI

IOH

;{L-16)+16

eCE5

47

MOV

B,A

;B=DISPLACEMENT

IF

<16

BeEt

C~Bseo

~MP

DISP2

;SKIF

SINCE

(10

.

-

_____

1:

C t:

<;---

01

5 P 5 :

6Cd<;

0~10

MVI

S.lOH

;CO

16

BYTES

PER

IT~RATE

Baeo

DISP2:

80F.E

E5

PUS..., h

;~AvE

ADDRESS

FOR

MSG

-------ce

C

r:.

C--2_1B

4...e.3-

_____

-'-1

X

L_--tl..-CR

......

C

...... O .........

_.:LR.

L£ • __

'-_'-

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-=-

____________ ~ ________

_

aO[F

COED82

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TYP~P

;Tyr-E

IT

cCC2

El

~OP

~

;qET~leVE

ADDRESS

ECC3

05

PUSH

D

;SAvE

<END>

---

___

BOC4

16.C'O

_____

,---_--'MV.L_

["I,

a ; Z.EfiC

__

SU~_1..CH£..CK.-aY.L-LT_'_E

_____________________

_

eecr.

78

MOV

A.S

;GET

LENGTt-

eOC7

CCAOE2

CALL

BYTDP

;~RI~T

THE

LENGTH

aCCA

CCE482

CALL

WRDOP

;lYPE

bEGIN

ADDRESS

8JCr:

AF.

Xt'.A A :_fl.AKL._I.'f.FE__.ZER

......

O'--

_______________________

_

aGCE

CDA082

CALL

SYTOP

;CUTFUT

TYPE

aOOl

7e

MUV

A.O

;TEST

FOR

FINISHED

1 +

TEST

;ZERC

LENGTh

IS

END

---'-

____

...,.c.EO

C£--1_.A7_

_---'

...

_____

~----'A~

;

~E_J_ELJ..

Gs....J.--C..'I'.E-....o'---=

______________________

_

e003

CA7380

JZ

MAIN

;~ET

IF

DONE

ECDc

CISP3:

eo

c c 7 E

MOV

A.

M

;lYPE

RECOqCS

___

~-eCC_l

CC.AQB.2

CALL

BYIDP

;ERINL

___

IT

____________________________

_

BOCA

2~

INX

H

;eUNF

FeINTER

cCCB

O~

DCR S

;EU~P

PARM COUNTER

Ecce

C2C680JNZ

DISP3

--

__

8 CDF-

__ A F-

________

---XR"--~

___

_O;..EO

K

1J_...5

L.MC

HECK,

n

eOEC

<;2

SUB

D

;SUMCHECK = -D

8CE1

CCAO€2

CALL

EYTOP

;CUTFuT

SUMCHECK

80E4

01

POP

0

;~ElRrEVE

<END>

SAVED

._--------------

eOEe

~AC~O

~SSEMBLER~

VER

2.2

MCE.~-8C80

MCNITCR

1.1

E~RORS

= 0 PAGE 8

BCE!:

C39FBO

Jt-1P

D I

SP

1

;00

ANUThER

RECORD

•

;---{;o-

-RDUTI

"'E

---

--------------------

EXITS

VIA

JUMP

T0

THE

USE~S

GOUTINE

AFTE~

RESTGRr~G

THE

~SERS

REGISTERS

-----(BCE-c:--.---

----

-----

GO-:-------------------------------------------------'----

80E8

C02683

8CE

E

Fe

ECte

E<;

-9-----

CALL

EI

_

PCHL

WRDIN

INSERT

DATA

COMMAND

;GET

JU~F·

AL)L)~ESS

;ENA2LE

EXIT

COMMAND

:JUI'JI='

THERE

ALLOWS HEX

~ATA

TO

BE

SECLENTIALLY

ENTER~D

;--_ -Tf-!

E--I

NSCK.L--f=

UNCTION--lS

__

I.EJ<M r

l\ATED

__

aY_A._CHAnR

___

_

AET~EE.N

G

AND

Z •

•

Eete

INSRT:

----.---vCED---CC26-8J3___

-_-----'C-'ALL....---...wRCIN-_;.GE_T

_INSER.T---ADDR._c;E~S,.;;S:>__

____________________

_

SCFe

INSTl:

eCFO

E~

PUS~

~

;SAVf

ADDRESS

ECFl

21~D83

LXI

H.CRMG

;TYPE

CR/LF

-----ECF..4.

(CA2.cac,,;3)-.-..----_

_C/,LL

LYR

1

----------------------

ECF7

El

POP

~

;~ETRrEVE

ACCRESS

8CFE

CDCAul

CALL

WRDOT

;TYFf.

ADDRESS

eeFe

7E

MOV

A.M

;(ET

P~ESCNT

CELL

VALUE

·--_--<€CE

C--U7u-8..;3>---

_____

-CALL-E-T_C:U

'-;.1 y_I;

£_-1-L

8CFF

CDF182

CALL

E1T

;CHECK

IF

C~ANGE

IS

DESIR~D

8102

FE2C

CPI

'.'

;LSE.

T8

OPEN

THE

Ct:.LL

8104

C2C881

JNZ

INST2

;SKIF

BYTE

READ

IF

NOT

•

-~-

B 1

C'_7-C04E83

C

Al.L---B-\('T-lAl---';CF.-T--NE-'\\--VAL

U E-(-E.X-I-L-F-RO-M-.J-iE..RLJ-)

----------------

Bl0A

77

MOV

MfA

;STCRE

IT

EIOG

lNST2:

8108

2.3

INX

H

________

~JMP-_-_II._IN.>I_.S~T

..

l

;~OVE

TC

..;..5J-A&.T-~'\j£X-T--L_LN£_---------------------

LO'AD

/-lEX

RCUTINE.

THIS

RUUTlf'JE

IS

COMPATIBLE

wITH

6.QT.H-THL_I:.AI.A.-.G.£bIEHALE.C---i:.D~-IH£_-D _ _CDJlLt._1AND_A~S'_·_'I6i"'_'l;;.E~I

,..41

_______________

_

AS

T~E

HEX

FILES

G~NE~ATED

BY

THE

ASSEMdLERS

AND

COMP

IL

Ek~

•

,

____

~(HCF_._____

LD.nAu-D.w:

_____

_

810F

05

OCR

file

CDIC83

CALL

8113

LDO:

8

EXPR

;GET

BIAS

VALUE

;USE

NORMAL

PARA~

... ~ 11

3---CCAD81

____

-

-----CAI-I

~1

__

_R_L

_____

.;-SEAf<.O:L.EQR..-~-t-----------------

Bllt

Df3A

SUI

f : •

81lE

C21381

JNZ

Loe

S11E

57

MUV

etA

;ZERO

SUMCHECK

,

_.---,-

-

..

-.~-.,

~ ~

---_.-_._----

d080

~_c~a

AS5~M6LER.

VER

2.2

MCEM-S080

MC~!TC~

1.1

ERHORS

= 0

PAGE

9

------------_._-----.

-----------

Blle

CDC6c2

CALL

8YTIR

;GET

RECORD

LENGTr.

~ll~

C~7380

Jl

MAIN

;EXIT

IF

ZERO

LE~GTH

8122

Cl

POP

P

;GET

BIAS

-...

0-----

812

J.

--

---F

e -----

--.-.--

-----

PUS

H------

PS

w----.

;

~

A

"E-R

e:

c

m~

C-L

E

f\.

G T H

----------------

-----

d124

C00682

CALL WPOIR

;GET

LOAD

ADDRESS

8127

O~

CAD e

:~DC

ElAS

E12E

Fl

POP

PSW

;~ETF;rEVE

hECO~O

LENGTH

---.--.

-8 1 2

9--C

5 P U

5;'

fl-------.-;

S A V

F.

13

I A

S-------

E12A

47

MOV

G.A

;FUT

LENGTh

IN

B

81~E

CD(682

CALL

SYTIR

JGET

~ECORD

TYPE

E12E

LDl:

-.-----

a

12

E--CDC6EZ-

CALL---D-Y-T-I-R'---~;

GE-1

--8

¥-1.t_--

8131

77

MOV

M.A

;STO~E

IT

IN

MEMORY

8132

23

INX H

;VCVE

TC NEXT

ADO~~SS

8133

05

OCR

B

;CECREMENT

~ECGPC

LENGTH

8 1-3

4--C2.

2

t.

81-------

-.

____

...J

N 1 L D

1--

;

Lee

P

n.

U

I\:

TI

L-

HE

CORD--LlUNE-...-

___________________

_

8137

COC6e2

(ALL

EYTIR

;GET

SU~CHtCK

EYTE

813ft

CA13El

JZ

LuJ

;5U~CHECK

W~S

ZE~O

BIJC

CE~8

MVI

C.'X'

;TYFE E FOR

SUMCHECK

ERROR

--------'(H~E_CDCOal_

CALL---C-O---------------------------'---------------

3142

C313€1

JMP

LDO

•

STACK

FOR~ATS

FOR

RESTA~TS:

USER

STACK

PCt-

PI-iL

H L

_______________________________

; __

--A~

_____________________________________________________

_____________________

_

PS'.\

MONITOR

STACK

B ( ~ 7 )

C

~.~~)--------------------------------------------------------

__________________

__

D

(35)

E

(34)

; A

(3.3)

;--P.s.~

_____

C22

~)

___________

_

------------------------------_._--_._--

---

H

(:;1)

L

(::0

)

;

PCH

(2F)

_____

--:"-

____________

;

__

ECL-

__

12EJ,

_________________________________________________

_

SPh

(20)

SPL

(2C)

MONITOP

STACK

STARTS

AT

2R

---------0------------_._----------

•

;

EXIT

CCM~AND

PROCESSOf~.

~E

GOT HERE

BY

DOING

A

;

RST 7 (INrT

~EQUENCE

W~ITES

ThIS

ADDRESS

INTO

RAM

______

-'--

________

:_-"_I......3.E

H_L_S_G..l?C_

LS.._ALllE.A£.Y_GJ~_U

S

ER_SIA

C I<..__.

__

SA_\,I.E_ .

.H~

_____________________

_

AND

PSW

UN

USER

STACK

TC

~AK~

ROC~

TG

~OR~.

SAVE

REMAINING

RE~ISTERS

I~

~AM

I~

SAVE AREA

AN~

Th~N

;

TRANSFER

THOSE

STILL

C~

USER

STACK TO

SAVE

AREA.

80EO

~AC~O

ASSEMBLER.

VEh

2

'}

.c:

MCE~-e080

MO~ITCR

1.1

ERRORS

= 0

PAGE

10

-----<>---

--->,,---_

...

--

--------------.---.-------.--->.-~----.--

..

------

..

; A TOTAL

OF

6

~YTES

OF

USFk

STACK ARE

~EEUED.

USER

;

SlACK

~UST

NOT

BE

THE

SAME

AS

ThE

MO~ITOR

STACK

; ONCE

FULL

RECCVERY

HAS

aEE~

ACOMPLISHLC.

WRITE

THE

>-.

,------.-~------;-

ADDRES~ThAT-G-CI-US-HEKE-C~-

THE-CONSOLE.

E

14

!:

RSTRT:

8145

E~

PUS~

H

;SAVE

HL

ON

USER

STACK

-----e

14

6--F

5,-----------'j:;US~

P-S

....

\II---.;~AV£-P--S

w~------~-

_____

~

_______________

_

E147

210000

LXl

H.O

;GET

SP

VALUE

IN

~L

814A

3~

DAD

SP

B14E

31~800

LXI

SP.RGSAV;SET

LP

SP

FOR

SAVE

AREA

----8

14E--C

5

PUSH

-9

; S

A.vE---Sw..C~------------------------------

e14F

05

PLJSr. 0

;SAIJE

DE

e15~

5E

MOV

E.M

;MOVE

A.PS~

TO

SAVE

AREA

flSl

23

INX H

-----cl!;

2---5

6-

MOV---~...M,----------

fl~3

23

INX H

el~4

05

FUSH

0

;THEV

AkE

IN

DE

~15~

5t

MUV

E.M

;~OV

HL

TO

SAVE

AREA

----->

--8

1

~.

C

.--.

2 3 1 N X-

H--------

El!:7

56

MUV

D.M

ElSE

23

INX H

El~S

05

PUS~

0

;THEY

ARE

IN

DE

--

__

~c15A

5E

MOV

E.

M

;Jv-DV-PC-TO-SA-"-E......AR£A

_______________________

_

815B

23

INX H

E15C

5E

MOV

D.M

E150

23

INX

H

----_E15

E 05...

_______

PU

Sb-...

__

D.

___

:_THE Y._ARE...

LN

__

DE_.

___

El!:F

E5

PUSr

H

elEO

218883

LXI

H,RSMG

8163

CCSA83

CALL

TYPMG

;SAVE

SP

IN

SAVE

AREA

;TY~E

EXIT

IDENTIFIER

t:·l-t~2-A?E

C0

--

---L-HLO--------FCSA-\l---;uGE"~T-.THE-uCALLING._AO.cRc.s.;;:S>__----------

___________

_

Bles

COCA81

CALL

WROOT

:.TYPE

IT

C~

CO~SCLE

elfC

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JM~

MAIN

;GO

TO

~AtN

LOOP

---;-

-R

E-TURN-P-R

O-Cl;;S-SOR_--RECC-VEJ,--AL-L

...:.Rc..G.!--s'I£.l=<.S-_E

RO-~H1;;E~--

_____________

_

;

SAVE

AREA

AND

THEN RETURN

TO

~~ERE

EVER

THL

PC

SAV

;

INDICATES.

O~E

~AnAMETER

IS

G~THEREC.

AN9

IF

IT

;

IS

NON-ZERO.

ITS

VALUE

IS

SUBSTITuTED

FOR

THE

PC

___

:~

E f

EflH

E

RF

TUfUdNG.

.....

___

_

•

elEF

RETRN:

BltF

C02683

CALL

~RoIN

;GET

ONE

PARAMETER

IN

HL

-----£112

___

7C

MD.'''

___

....

A...J:i

___

-<;O-lt:

C.T I E

IT

1 S 7 FRO

8173

85

eRA

L

c174

CA7Ae1

JZ

RETRI

E177

222EOO

SHLC

PCSAV

-----..el.7

A

__ . ______

.

-------1t.£IR.l~

__

E17A

El

POP

El7S

01

POP

817C

(1

POP

H

o

B

;~L

=

O.

DONT

WRITE

P~

SAVE

;~TCRE

~EW

DESTI~ATION

VALUE

;eET

STACK

POINTER

;GET

PC

; (E:: T

HL

80ee

~ACr:;C

.ASSEMBLER.

VER

2.2

MCEtJ-8000

.'-'ICNITOR

1.1

ERRORS = 0 PAGE

11

C17C

F~

SPHL

;RESTCRE

STACK

POINTER

El7E

D5 PUSH D

;FUT

PC

eN

STACK

E17F

C5

PUS~

8

;PUl

HL

ON

STACK

(TEMP)

-.-------.

e

180---·21

::200-----·-·-·

- ........

LX I ·----H

9

PSSAV-;

rJC"l

\If:··

A.

PSW;--F

hUM

5T

ACK--·--·~··

..

-·---

-------._----------.

8193

5E

MUV

E.M

;~SE

DE

AS

EUFFER

PAIR

9184

23

INX H

clee

56

MOV

D,M

-----e

166--2

3

IN

X

HI-------------

8187

05

PUSH

D

;SA~E

FOR A

WHILE

ON

SACK

BIbB

5E

tJov

E.M

;RECCVER

DE

SIES

23

INX H

----81dA---56

M(JV---D·...M------·-------,-----~--------~-----------

E 1 E B 2 ::

Ir-J

X . H

EleC4E

MUV

C,M

;RECCVER

BC

6120

23

INX H

-----t:H8E----4-6

----MOV---C

...

M----·

----_._---------------------------------

81BF

Fl

POP

PSw

;RECCVER

A.PSW

8190

El

POP H ;f-iECCVER

HL

SISl

Fe

EI

;ENAELE

INTERRUPTS

(RST

7)

-----S1-92

CC;

RET

...;~E..cCVG.R-

..

_P'_r--------------------------

CCNSCLE

I~PUT

FOUTINE.

T~E

DEVICe

INDICATED

~Y

THE BOTTOM

T~O

OITS

OF

IUBYT

IS

CALLED

AND

EXPECTED

----+--+T--I.C

....

J~£T.u.RN_A~A.RACI£R

• T t-:.E--C

~_AR.A

C-1"EJL.J...ET

~.s..........l.N_---------------

•

<.1l

<;

::

C I :

8l~3

3AC300

LDA

10DYT

;

GE

1

10

ASSIGNME'NT

11J.RCI:i :

------'S

1

se---------J....

----_._-

51St

E6'J3

ANI

3

;lE!:l

EOTTOM

E.l

ITS

819S

CA::882

JZ

CHI

;ZEf1C

IS

SE

RIAL

1 NPUT

elSB

3D

DCR

A

-------~a~yc

C~~F~6~------------~

12-

k!3I~

";"CNE

IS

KEY80Af:<D

IUfWI

51C;F

~D OCR A

8lAe

C240CO

JNZ

usnIN

;I\OT

TWC

IS

THREE

(PARALLLL)

•

---

______________

.....

; ....Q.A.R.ALl..-EL--...LNf>llT.-...Ji.CUT4..NE...... 7

F'I

T--AS.CU

__

LS

..

_EXQ.£.CJ:

c.E..l..CIL-

__________________

_

;

ON

THE B PORT OF THE

PPI.

TRUE DATA

IS

EXP~CTEU.

•

81A~

PARIN:

-----..,..'8~·

lA~-DBCt:;.E____

_

___

lbL

_____

E..SJ..A....tT

__

i.G.L:L-lliE-.E.OkL...SLAIulJ...:;S'---

_______________

----------------

81A~

EtC2

ANI

PIRDY

;TEST

INPUT

RLADY

8IT

SlA7

C~.A381

JZ

PARI~

;L(JCP

TIL

IT

IS

READY

SlAA

DPOD

IN

PINPT

;REAC

TbE

C~ARACTER

..alAe

C

s.............--__

----.RCTL-

________________________

.

READER

IN~UT.

BITS

2

A~D

3 OF

I08YT

ARE USED TO

DIRECT

CONTROL

TC

THE

PROPER

DEVICE.

AN

ASCII

CHAR

IS

RETURNED

IN

ThE A REGISTER

•

...

_-'-----------------------..,---

8lAe

RI:

81AlJ

3AC300

8lED

IF

LDA KAR

IOEYT

;GLT

10

ASSIGNMENT

;~OVE

T~E

BITS

IN

QUESTION

80SC

~AC~O

ASSEMBLE~,

VER

2.2

~CE~-808a

MC~ITC~

1.1

ERRORS = 0

PAGE

12

81

e 1

81132

IF

C3S6el

·

•

---------_._----------

-----

------------------------

18RCH

; TC THE BOTTOM

T~O

BITS

.;

EI< A

!'>.CH

TO

FROF

ER

ROUT 1

NE

-.----

...

--.--.------

----;-

--CQt;JSOL E

GCHG--f'GUTI·NE.-G-E-T--CHARAC-r

ER--A

!'>.D-··-=i

HEN-{.F-:-----------------

; THE

MODE

IS

ASCII.

ECHC

IT.

•

81E5

ECrO:

-----..<81B·!?--GI;.Q8·1---'------,(ALb---'=C,..;ll----..y;.<;E-T-CH-AR-·-~RO.M--..c.QNSQbb_----------~----------

81ee

4F

MOV

CtA

;~CVE

IT

INTO

C FOR OUTPUT

81e~

F5

PUSh

PSW

;CUTFUT

MIGrT

CESTROY

IT

SlLA

3AODOOLDA

ECHOM

;SHCLLD

~E

ECHO?

------------.-1-

..

------+

:fEST

.....;.ZF

[;C--1

S-YE:...So------------------------------

8lec

1

A7

+

ANA

A

;SET

FLAGS,

CY=O

8lEE

(2(881

JNZ

ECHOl

;CC~'T

ECHO ANYTHING

81Cl

3AC4CG

LDA

IFLAG

;DO~'T

ECHO

IF

INCIRECT

MODE

---1-----

....

------1

E

51----'-------

81(4

1

A7

+

ANA

A

;SET

FLAGS.

cY=o

81e5

(CC681

CZ

CO

;ECHC

IT

IF

NOT

I~DIRcCT

81Ce

ECHOl:

----81

(·E-·-F-I----------lFOP-----tP-Sww---~j

RF--:CCV

E~-+HE.-C.HAF

Ac.r..E~R--------------------

elC~

C<.:i

RET

...

ORC

CUT PUT RTN

---------~.-....JQbJ.\"IUl_J....'Tn.u...:r-S

4

AS-C--W---C-OO-U)....-HE;-X--tll-C

I·..T..S

___ ----------------------------

,

elC,A~RCOT:

;CE(CCES

AND

PRINTS

HEX

SlCA

C5

PUSH

B

:5AVE

BC

Rl.GISTLRS

81(6--7C---

-

_______

MO\L

__

.....

A_.H

___

-..

•.

l.-6

__

B.l.L_li_l..N_U-lL_L

€lCC

CD78B3

CALL

6TCTI

;SPIT

OUT

HIGH

BYTE

81CF

7C

MOV

A.L

;GET

LO~

BYTE

8100

C07883

(ALL

STOTI

;SPIT

OUT

LOW

BYTE

-----B-l-t:;;

C 1

POP

6 ;

~.E-.I.N

E.V£

8 C R

EG..LST..£R~S>-----------------------

SPACE'OUTPUT

PTN

•

-----8.l..C4

8104

___

........;;<:pA..CO.=-

_____________

_

OE20

MV

I

C,

•

,

; CONSOLE

UUTPUT

ROUTINE.

THE

10BYTE

IS

EXAMINED

-----

___

-------

__

...

_TJ).._D.E..I.ERM..L.'\l.E

T H

I::

P ROP.....ER-IO"' . .lJ.EV-I CE • T

HE_V...A>l...!

.....

!)..JI

Lr.;..·

-.!..Ou

E

=--

______________

_

; THE C

REGrSTE~

IS

TH~N

CUTFUT

VIA

THAT

CEVICE

•

clCE

CO:

-

___

-'-

..

.8

1 D

6.

__

..3AO.3.00-

__

.......

1 D

A'--

__

.........JI

.......

O..J.J8[;;.Y.L·..J-T_~+

• ....,GEL_UL..AS..5..LGNJ.ol.Eb1.L.

__________________

.

81C9

C8RCH:

tllC<;

EE03

ANI 3

;eRA~CH

eASED

ON

BOTTOM

JZ

CHO

;ZE~C

IS

SERIAL

10

81ce

CI\4882

----··--t

lCc--3C----

--,-,-0

CR--A-

_____

..

______ . _________ . _____

.. _ --'------

____

_

.

fleF

CI\C4f8

JZ

DSPOT

;CNE

IS

CRT

DISPLAY

SlE2

3D

OCR

A

8lE:'::

(24300

~NZ

USROT

;~OT

TwC

IS

THREE

(PARALLeL)

8080

~AC~O

~SSEMBLERt

VER

2.2

MCEM-S080

MC~ITOR

1.1

ERRORS

= a

PAGE

13

PARALLEL

CUTPL;T ROlJT I r-.E. ALPHA CHARACTERS

ARE:.

OUTPUT ANC

C~~TPOL

CHARACTERS

A~ENT.

A LINE:.

FEED

IS

,-

.-.~

.......

,-.---~

...

----

.... ~ ..

-.-' _ ...

_----------->

liSFD

TO

C;ETF.l~

N r

/'.;E

THE E

I\DCF-·THF

LINE

ANC-DR I

VE:.S·-A-------

RUN

UUTPUT.

THIS

INTERFACE

IS

INTEND~D

TO

DRIVE

EASIC

LINE:.

PRII\TERS.

-----01

E

t-----·-----PARO-T-

;....:

---.---.

alEe

D~OE

IN

PSTAT

;GET

THE

PORT

STATUS

elEE

EcEO ANI PCRCY

;TEST

O~TPUT

REACY

BIT

81~~

CAE6Sl

~z

PAROT

;LOCP

TIL

IT

IS

REAGY

-.--

-.-------B

1

F.

G---7

C;

- .-

---

-MG

V

·----A.

C

___

;...1

H

t:-.-

CHA,,<-AC-lER-J-S-l-N--'-C------------------

81EE

D20C

CUT

FOTPT

;CUTFUT

THE DATA

131FO

C9

RET

•

-----~--.;--p

U I\;

Ck-DUTP

UT-RUJ-T-l-t-:E.--E.I.T-S--4--AN

c-

5-DF

__ T HE-LOEiYJ----------------

------c-lF--t,~----

8lF

1

3A0300

SIF4

07

81F5

07

-------cSl

F--

....

f--

... C.:u:: C 8 1

;

DETERMINE

THL PUNCH

DEVICE.

A

CHARACTER1S

EXPCE:.TED

;

IN

T~E

C

REGISTER

•

p~~-------------------

LDA

I08YT

;GET

10

ASSIGNMENT

PLC

;MOVE

8ITS

4 AI\D 5 TO 6

AND

7

RLC

;50

THAT THEY

CAN

uE

MOVED

JMR

_----'LL.-Cl.l

___

~J-O'--T.H~

CONSO.L..E-PCSJLl.1J.b1--------'-------------

.;

LIST

OUTPUT

RCUTINE.

eIT~

6

AND

7 OF

TrE

l08YT

DETERMINE

THE

LIST

DEVICE.

8IES

La:

81F~

3AC3CO

LOA

I08YT

;GET

THE

10

ASSIGNMENT

81FC

La!:

--------€

1

F-C.--'O'7---

______ ~ ___

.RLC

~ND

\J

E

___

.8US-.....L.A..ND

_"Z-TD-I.......,H""E_·

_________________

_

DIF

D

07

RL

C

;CO~SOLE

POSITION

SlFE

C3C981

JMP

08~CH

;eRA~CH

TO

PRCPLR

~CUTINE

•

-

_______

---...;.-'-CO

N

SCLE-.-Ll\.p..ur--S.I.AWS-RG.LI.

I.t--E~_.J.HE.......sELECT..J:;E

....

D'----------------------

; CONSOLE

DEVICE

IS

INTERCGATED

TO

D~TERMINE

IF

A

; CHARACTLR

IS

~AITING.

A ZERO

IS

RETURNED

IF

NO

; CHARACTER ANu A

-1

IF

THE~E

I S A

CHARACTER.

·

----.-----'--'----

e::Cl

CSTS:

8~Ol

3AC300

LDA

IOBYT

;~HAT

IS

CO~SOL~

C~VICE?

8204

E603

ANI 3 ;URAI\CH

ON

CONSOLE

ASSIGN

______

8.2 O.L-..c:.2...l1.u8.L;2

________

....

JN-'Z

___

.>...CS.lS.c.2

__

.....

:

LZ~EF.....LlS..-.S.t-:.E..LAG.-D.fL...LT'__

___________________

_

82CS

D~CB

IN URTCT

;G~T

USART

INPUT

STATUS

8201;';

CSTSl:

E2CE

E6C2

ANI RXRDY

----<,;;e.2

CJ:

__

-C

E

R.L

_________

...

;....I7~Fc...Jr&--LS

___

NQ_Cti.AR

__

._

~20E

3EFF

MVI

AtOFFH

;NO~

ZERO

IS

ChAR.

USE

-1

8210

CS KET

821

1

CSTS2:

8:>Ee

MACRO

ASSEMBLER,

VER

2.2

rv,Ct:"'-BC80

MCI\ITCR

1.1

!=F.RORS = 0

PAGE

14

8';::

1 1

3D

LCR A

;ONE

IS

KEYBOARD

8,12

CAC7F8

JZ

KOSTS

e"l~

3D

DCR

A iTWC

ts

PARALLEL

82.l-G-C-Z4.6-0

....

0l-.----

---..JJN-Z----vi

tSRST----

PARALLtL

INPUT

STATUS

RCUTINE

--------~eh~~l~~~--~uHe~c~Er_------

8218

C3C882

--

...

Il'>JI--~------tP-S

TAT

JMP

CSTSl

; G

E-T-.T.HE--P-OR:r---S-l"-A.T-",U~S>---------------

____

-,-

_______________

_

;~SE

UART

TEST

AND

SET

; CI-'ARACTt.R

H~IJUT

ROUTINt=

<,SERlftL).

IF

TI-E

MODE

IS

---------9;-BAUOO·T.

__

T-H-E--l-l'.gu-L-CJ1A.R.Ac.:rE-F.-.rS-CO"'VEfJ..E~O'--TwOu-..$-Ao,..;S~C-.JI..4.-I

....

-----------------------

;

IF

Tt-L

CHARACTER

INPUT

IS A CASE

.shIFT

CHARACTER~

; THAT

SHIFT

IS

DONE

AND

ANCThER

CHARACTER

IS

WAITED

;

FOR.

---------,----_._-_._---'-------

8,lE

CHIl:

B.c

IE

E

~

PUS

I-

H

;SAVE

SCME

REGISTERS

e~lF

os

PUSt-

0

-----8"

2

0--2

1·8c~_3--------LX.I

H.EDT

A B

; G

E-T--

SET---r:U-CONV-ER:r

------------------

_____

-.-

______

_

8223

DECA

IN

URTDA

;GcT

THE 5

erT

CHAP

8,,2~

5F

MOV

E.A

;!:AV[

IT

IN

E

a~2f

3AC700

LOA

ECASI

;GET

THE

CASE

TO

MAKE

IT

6

-------8,22

<;--8'

(iRA

E

; A

Pf:E..N

D_THE-_

CASE:.-LO

__

illL2..OH~)_'

______________

........

.--

____

_

8~2A

SF

MOV

E,A

;GET

TOTAL

IN

DE

8228

leeo

~VI

0.0

8,,2C

l~

DAD 0

;CALCULATE

THE

TAELE

ADDRESS

822

E--_7

E

.MOV

A.-M'--

__

....

i.GEL

3

HE

_ASCLL_Ct-.AfL

_________________________

_

822F

01

POP

0

;R~CCVER

scrvE

P~(ISTERS

8230

El

POP

H

1 +

TEST

;~EGATIVE

INCICATES

THAT

IT

----~,

60:;~·1--l.-A7----*-

ANA

A ;.sE.L.FLAG.5....-.--CY.,;;:.O-

____

._.

8232

FO

RP

;CASE

C~AR.

IF

NCT,

RETURN

8Z3~

Ee20

ANI

2~H

;ALLCW

CNLY 0

OR

20H

AS

CASE

8,,3~

32C7CO

STA

UCASI

;FUT

C~SE

AwAY

FOR

LATER

------82:'.8-------.

CHL..!...---

---.--------.

E23E

DGeS

IN

URTCT

;GET

LiS~RT

STATUS

B23A

EfC2

ANI

RXROY

;IS

THERE

A

CHA~ACTER?

e23C

CA3882

~Z

CHI

;~O.

LOOP

UNTIL

T~~K~

IS

------Cs

23F--08..C

BIN

! IRT.C r

;.G

E~LJ

HE...-S T

ATUS......AGA~N_..1-MO

....

OLJ;E~)

___________________

_

e~41

EfED

ANI

DSR

;W~AJ

IS

THE

MOGE?

82

/

13

CfllE82

JZ

CHIl

;ZEF'C

IS

BALiDOT.

CONVI;:RT

824f

D8CA

IN

URTDA

;~OT

8ALiOOT.

SI~PLY

INPUT

____

-B2..llB.-----E67F

__ . ____

.AN.l-

____

7.E~_;J3UL..N.AK.F

I J

.LJ3.LlS_El.RS...lT

__________

~

________

_

824A

CS

RcT

;

SERIAL

CHARACTER

OUTPLT

R~UTINE.

ThE

WCDE

IS

.----_:

__

CHECKEILAND._

.. l ..

L_l.L

..

lS_EALDG...T

•.

_IHE

__

CHAR~

CTER

IN.

THL.

__________

_

C

REGlSTEH

[S

COI\V~RTED

Te

BAUCOT

PFIC~

TG

SENDING.

;

OTHEI<wISE.rT

IS

SI~f1LY

CUiPUT

TO

THE

USART.

IF

; A

CASe

CHftNGc

IS

INDICATEC.

THE

CASE

C~ARACTER

IS

8180

~ACRO

~SSEM8LER.

VE~

2.2

MCEM-80aO

MC~ITCR

1.1

ERRORS

= 0

PAGE

15

;

TRANSMITTED

PRIOR

TO

ThE

ACTUAL CHARACTER

(BAUDOT

; M

CD

E 0

NL

Y ) •

.

•

-,,-.--

..

----

82

4 E

---

..

----.-------CHO

!-------

---.-----------

-

-.-----.

e24~

Oe~6

IN URTCT

;C~TEPMINE

MOCE

FIRST

8c4C

Ecce

ANI OSR

;O=EAUDOT

624F

CA~De2

JZ

CH02

;~A~COT

~ODE.

GO

CONVERT

IT

---.8.2

~

2------

..

----~C.._lH~O\.hl.l_:

________________

_

e2!2

DBCS

IN

URTCT

;TEST

FOR READY

A~D

OUTPUT

82~4

eeCl

ANI

TXR0Y

;THE

CHARACT~R

IN

ThE

C

R~G

c£!6

CA~2c2

JZ

CH01

------€2!<;--7S~-------____MOV

--.A~·...c

__

-------,---------'-C.-_------_------------------

e2~AC3CA

OUT URTDA

e 2.!: C C

C;

RET

S2!C

CHC2:

-------8

C.

5

c....--~_5piJ

S

H.--....jHr::-------t;.~

A V

E--SCM

E

__

R E Gl5..TERc..;S:>---

_____________________

_

e~5E

05

PUSH

D

e2!:F

21EE83

LXI

H,8DTAB

;SEARCH

THE:

TAbLE

FGR A MATCH

8262

1640

MVI

0.64

; THE

TABLE

IS

64

ChARS

LONG

____

8 2

~4---7

~--------_<MO

V A • C ;

CC N FAR

ES--

ARLC

Ol\..E

-IN-.A~

__________________

_

d2t!:

CH03

:

c2c5

BE

CMP

M

;COES

T~IS

CNE

M~TCH?

82ft

(A7082

Jl

CHC4

;VES.

EXIT

LOOP

ELc_S---2....;..,~

________

_.LINX

___

.JO:HI___

____

•

EU

.....

_P

__

ADCl-I.LS-S.

___

_

E2CA

1~

OCR

C

;tcC~E~SL

COUNT

82fE

C26582

JNZ

CH03

;CC~lINUE

TC

LCOP

TILL

ZE~O

826E

1640

MVI

D,64

;IF

~o

MATCH.

PRET~~D

8LA~K

a;.

7

c-

__

...

_____

....

C=H

Q4

:

£:270

3EL~O

MVI

A.64

;.lICTLAL VALUE

IS

f.4-COUNT

8272

92

SUB D

;CALCULATE

ftCTUAL VALUE

8273

57

MOV

Q.A

;SAVE ~ CUPY

IN

D FOR

LATER

827A------2-1--CE-O-o'-

____

--l...LX1.

___

nH

.•

BCASO;.IES

__

:LAI\.D-SE-I-.CASE-lF_.Af>.!=:'RLE-'-C.

_______________

_

~277

£620

ANI

20H

;tTh

BIT

IS

CASE

(O=LETTERS)

827S

BE

CMP

M

;CC~FARE

TO

€27A

CAE982

JZ

CH06

;~ATCH.

NO

~cED

TO

seND

CAS~

_______

62.7

C-......-7.:1 MO'I/ M •

.A'---

__

;.h

U_~N.AT._CH

.•

__

._S

E...I_CASLB...l..GH.I

___________________

_

827E

0EIF

MVI

C.LTRS

;SENe

CASE

(O=LETTcRS)

1 +

TEST

;CASE 0 OR

201-!1

828C

1 A7 +

ANA.lI

;SET

FLAGS.

CY=O

__ . ____

E2.E.l.~·

_-'C.-IM:._6.a&.2

____

.,---_~JL..7

___

_!Cl:LC'_'')

__

~;LLT_I£ES

__

CASL_.-.5.E"D

.....

I-'T'--

___________________

_

8284

OElS

MVI·

C.FIGS

;I\.OT

LETTeRS.

SENe

FIGURES

S286

(H05:

E2E6

(05282

CALL CHC1

;5END

THE CASE

S~IFT

CHAR'

_____

8289

________

~C~H~O~6~!

_______________

_

82e~

4A

MOV

c.o

;r.ECr,VER

T~E

ORIGINAL

CHAk

82eft

D1

POP

D

;RFCCVER

SO~E

RE:GISTE.RS

82SE

El

POP

H

_____

--B~'--<:2.S.2

.....

8c..:;2'__

______

.....

11_1.E

___

..>.C__'H--"Ou.l

.....

__

_____.;

....

G

D-S..EN.~E-CHAR.ACI.ER

_____________________

_

10

ChtCK

RUUTINE.

THE:

~ALUE

CF THE

IOEYT

IS

RETURNED

IN

ThE A REGISTER

-_

.•.

_----------------_._---

doae

~ACkO

~SSEMaL~R.

VER

2.2

MC~~-8080

MC~ITOR

1.1

ERRORS

= 0 PAGE

16

8;:2F

IOC~K:

e2EF

3AC300

LDA

IOBYT

-------S2

'i

2--C~----------

-

-----RCT------

10

SET

ROUTINE.

THE VALUE

CF

THE C

R~GISTER

IS

;

SUBSTITUTED

FOR

THE VALUE

CF

THE

I08YT.

·

----'-----

t------------------'-------

S~g::

IOSET:

E2S3

7S

MOV

8294

32C300

STA

A.C

IOBYT

;SET

NEV.

IOBYT

--.--B--.2S-+---C-<;.-----------lR-E:..:tT=-------------------------------.--------------

ME~ORY

CHECK

ROUTINE.

TWC

RA~

LOCATIONS

AK~

USEU

TO

STOPE

THE

TOP

OF

PAM.

THLY

ARE

ReTURNED

IN

A

ANC

n.

LLASl

SIGNIF

lCANT

IN

A.

-

------------------------------

t

e;:

S E MEMCK:

t:L':9E

lAC6ca

LDA

~SZ2

;~CST

SIGNIFICANT

BYTE HERE

B':S

e;--~47

MOV----<E;;...·

.. 9 A,-

__

'; . .f:-UJ_IT_I.N

__

E

€2<;C

31-C500

LDA

~SZl

;LEAST

SIGNIFICANT

BYTE HERE

8~C;F

CS

RET

, .

______________

;-Y

UNCl:-LEY_T.E-OUlPl.lL.fi.Q

U-IJ.J\.E..----I

HE.....LCNSOLE

__ o Y.T E Oll

T.Eli.T!-

________________

_

;

~nUTINE

IS

USED

EXCEPT

THAT THE

rOBYT

IS

fIRST

;

RGTA1E~

SUCH

T~AT

THE

CC~SCLE

ASSIGN~~~T

AND

PUNCH

;

ASSIGNMENT

ARE

INTERCHA~GeC.

WHE~

FINISHED.

THEY

------..:.....-------

____

;_AEE

__

.AG/\II'i_lNI.ERLh.A..'\I.G£C-SO-IHA.LALL.LS--DK

...

________________________

_

82AC

BY10P:

82~O

CDA682

CALL

------.6

Z

.... A ..... : __ • ----'-C

... D ....

7-'-&-2

0.3--

CAL

L

puca

BYTOT

;INTEFCHANGE

PUNCH

AND

CONSOLE

;

CO

BY IE-DUJEc.o..II-IT'--

_________________________

_

ROUTINE

TO

INTERCHANGE

CON~OLE

AND

PUNCh

ASSIGN.

·

•

----08

~.A

c--

-.----

__

-E.UC.c...:

B

2A

E F 5 PUS h

PSW

;~AvE

SCME

REGISTERS

e2A7

E5

PUS~

H

82AE

21C300

LXI

H.!OBYT

;FOIl\1

hL

AT

IOBYTE

B

2/\

t..-----1:E

_________

-lMO_V

A • M ; IN..I£BCl:i..ANG f

-r

OP

.AND-.B.UII.D

.

.."ML-

______

--'-

__________

_

82AC

OF

PRC

82AC

CF

PRC

S2AE

OF

RRC

_____

.E2A

F.

OE

-RR."-c

________

_

e2EC

77

~OV

~,A

;FUTIT

BACK

8t:81

El

PO?

H ;~ECCVER SOME

REGISTERS

8282

F 1

PCP'

PSW

-------.64:

6.3--Ct;,;

ReI

WORD

PuNCH

OUTPUT

ROUTI~E.

PUNCH

AND

CONSOLE

;

ASSIGNMENTS

ARE

INTEkCHANGED

TO

USE CONSOLE

---------------------------

8080

~~C~O

ASSeMBLER,

VER

2.2

MCEM-8080

MC~lTC~

1.1

ERRORS

= 0

PAGE

17

82134

-----------82

64----C

D~·~

2-

8287

CCCAS1

8~EA

C~A6€2

;

ROUTINES.

WRDOP:

---

--CALb.---tPUCO CALL

wr·WOT

.JMP

PUCO

•

-

_______

;-P

UN C h-MES

SAG.G--T-¥-R~

• A

GA-I-~.--CONSCI..

E-ANC-P-UNCH-------------------

;

ASSIGNMLN1S

ARE

INTERCHANGED

TO

USE CUNSOLE

;

F;OUTINES.

•

----82

e

D-.

------------~-YPMP..!__---------_-

82EO

CCft682

CALL

PUCO TYPMG PUCO

82CO

CCSAe3

CALL

82C2

C3ft682

.JMP

-.--------.--~.---.-

..

----------.-----~-----

----<---.----

;

READ[R

BYTE

INPUT

ROUTI~E.

THE READER

ASSIGNMENT

;

IT

ROTATED

INTO

THE

CC~SOLE

PCSITICN

SO THAT THE

;

CONSCLE

RCUTfNES

CAN

BE

USED.

THE

ASSIGNMENTS

ARE

-----------------

..

-RES·"J:DRcO-WI:--EN-DCNE.--Sll\CE--AN--E.XI.."f'--CAN-BE-DON~£RDla."---------------_

;

TrE

EIT

RCUTIl\E.

A

FLAG

IS

SET

TO

INDICATE

THAT THE

CCE462 CC4Ee3

;

S~ITCH

HAS

BLEN

MftDE.

IF

AN

EXIT

IS

TAKEN

THE

;

P~OPER

ASSIGNMENT

WILL

CE

RESGTRED.

EYTIR:

CALL CALL

RopeD BYTIN

;~OVE

REftDEh

DEVICE

TO

CONSULE

;USE

CONSOLE

BYTE

INPUT

-------~------

----~----------------------------------------

RCUTINE

TO

RECOVER

THE

CLG

CCl\SGLE

AS~IGNMENT

AND

OLD READER

ASSIGNMENT

AFTER

USING

CONSOLE

ROUTrN~S.

------e2cc

----~RCV~~l~:____

____________________________

_

8cce

F5

PUSH

PSW

;SAVE

SCME

REGISTERS

a;::cc

E!:S

PUSI-

H

8;:CE

21C300

LXI

H.IOBYT

;FCII\T

HL

AT

IOBYT!:.

------~e2D

l---7-l::E~

________

MOV

____

14-A

....

-"'M'--

__

~;j;UI

ATE

rOSYT

2 I

EFT

82C

2

07

RLC

82C3

07

RLC

82C4

77

MOV

~tA

;!'ETLRN

IOEYTE

--'

------8.;:D'"

2C-

IN.R'---

__

LI

___

;,.F~l'J..J-jL_AT-IELA

.....

G'__

_____________________

_

'820f:

36CO

MVI

M.O

;RESET

IT

TO

.lH-<O

8CCS

El

POP

H

;RECCVER

SOME

REGISTf:.RS

a2CS

F 1

POP

PSW

82..CA

CS

REL-

scce

82CE €2CE

CCE482

CD261;33

·

•

READEP

WORD

INPUT

ROUTII\E.

AGAIN.

THE CONSOLE

ROUTINe

IS

UTILIZED

BY

MOVING THE

IOBYTE.

-----.----------:----------------~-.-.---.

--

wRDIR:

CALL CALL

RDRCO wRDIN

8080

~ACkO

~SSEMBLER.

VF.R

2.2

MC~M-8080

MCNITCR

1.1

ERRORS

= 0

PAGE

18

._---------------------------_._-----

at:

E 1

C3CC€2

JMP RCVRI

READER TO

CONSOLE

ASSIGNMENT

S~ITCHER.

·

..

-.-

------

..

-----------

-,

--------_.-

a2£:4

RCRca:

82E4

E5

PUSH

H

;SAVE

HL

e2l::.5

21C300

LXI

HoIOBYT

;r:Clf'.-T

HL

AT

IOBYTE

-----82E.a.....--....-7

E;.........-----~~--'-'MOV---...JII'+_.

+ •

.fI<M"----....,;.-;s·j,:j-:u~-+_I·O~

...

E~F:...Tl__--------------------

........

- --

..

.

82E

S

OF

RhC

82EA

CF RFC

82EE

77

rvov

M,

A ;r:<ESTORE

IT

-------8:2

E

(---2

c- r

NR:---4b=-----~;

~O-IN+-A.

T-l-F-L-A

...

Co-------------------------·

c2ED

3EFF

MVI

fJ,-l

;SET

FLAG

TO

-1

82Ef

E 1

POP

H ; RECOVER

HL

U.<:FO

CS

RET

---;

..

-----

;

ECHC

INPUT

AND

TEST

·

•

E2Fl

ElT:

-----d2F·l--

(OeS-B.l

(AL-cI..---t~O:

GE-T-~hAR-AN~C_H\JO'------------------------

82F4

FE20

CPl'

I

82FE

CAF182

JZ

EIT

;lGI\CRE

ELANKS

82F9

FE2C

CPI

,,,

;CO~~A

IS A DELIMITER

-----..e2~c--37

STC'----------

82FC

CE

PZ

;RETLPN

~ITH

CY

SET

FOR

DELIM

82FC

FEeD

CPI

CR

;CR

IS A DELIMITeR

82FF

37

5TC

----~8~O

O---C8

.

-R

z..

;-~.E...L-

w.L.T..r_-C...'L-SE.:t:-EDfLD£.L.!.M-

______

--'-

__________

_

8301

FE47

CPI

'G'

;STCF

IF

LARGER

THAN

~

8~03

3F

CMC

;INVERT

CARRY

elT

8304

DC

RNC

;NO

CARRY

IS

OK

CHARACTER

----.

-8~-1J..5

3.A-C-4-0-0

LDAA~~--.IHF=-t,L-+lAr\.;G_~~~--~--.-:~-~------'----------------------

1 +

TEST

8~C8

1 A7 +

ANA

A

;SET

FLAGS.

CY=Q

8~CS

C~7380

~z

~AIN

-----e-3CC-CDCC8-Z---------CALL.

___

RC-VRl-

___

_

e~CF

C37380

~MP

~AI~

;

NIB~LE

ROUTINE,

CONVERY

ASCII

TO

~EX

c:! 1 2

NIBBL:

8:;12

0641

:COM~ARING

FOR

>=10

8314

F21983

___

.-----S~.1-7._-C

...

E'""C~71__

__

_

8::

1

<;

8::19

CeCA

;/JAKE

IT

BINARY

8311:

Ct;

;THAiS

ALL

FeR

PERFECT

INPUT

EXP~ESSICN

(PAPAMETER

LIST)

G~A~eER

8.31

C

EXPR:

------_

..

_--------

-------------_

...

--

aeee

~~c~C

~SSEMAL£R.

VER

2.2

~C~~-80Da

MCNITOR

1.1

E~RORS

= 0

PAG~

19

._-----------------------------------

B21C

CC2683

CALL

W~DIN

;RE~D

16

BIT

GROUP

INTO

HL

821F

E3

XTHL

;EU8BLE

PC

CO~N

ON

STACK

822C

E5

PUSb

~

;5TACK

IS

PARM

LIST

------8..;

21---0

5

-----·-----·-·OCf-:

----B----

-;

CEC--

PA

r.M--CGUN.::r.-.~·

----

8222

C21C83

JNZ

EXPR

;CUIT

WHEN

B

E~PTY

822=

CS

RET

WRDIN - READ

IN

16

8IT

ACCRESS

·

•

8::;2

c

~RDIN:

---B":=

2

c--

210

0 O

...

()

_____

~_.LX

I

.----l=H

....

>.J.O---;

CLSAI<_E

UEFER.--.

8J2S

C5

PUSb

B

;SAVE

PftRM

COUNT

a22A

oeC4

MVI

8.4

;G~T

4

HEX

DIGITS

IN

ASCII

8::;2C

WRD1:

____

8..:;2

C--CCF

lE2--

_____

._CALL

__

·_ElT

;

J;E.AC/Cl-ECK

..

CHARACTER-

8::;2F

D23B83

JNC

~RD2

;CARRY

SET

IMPLIES

DLLIMITER

S332

78

MOV

A.B

;'~ST

FOR

NEW

~ORD

8::;~~

FEC4

CPI

4

;E=4

~EA~S

JUST

STARTED

-------<8.::

3

~--.cA2

C.8.3----------1z.

\AI

PUI

;I.G

I.

C

fiE-

....

-AT.

-8

EGLNN..I.N

yG>----------------------

8228

C~48e3

JMP

~XIT

;VALID

DELI~ITEk

IF

NUT

1ST

8:2E

~RD2:

823E

CC1283

CALL

NIEBL

;EAT

SO~E

CHARS

------e..:;..:~..2c'=__---------_DAh\,.DJ--

___

H

______

.;HLi<2__

__

_

a:::::F

2<;

DAD

H

;:-L*2

e':4(.

2<;

DAD

H

;ML"'2

8241

2S

CAD H

;LO~C

LE~T

SHIFT 4 KIDDIES

8':4

Z---B.5.--------------WC.'RA...-

___

L ; e

R-ll\

C _LN.-J\j-LW-.

4--8

J.-IT.J....;;S>--

________

.

______________

_

8343

~F

MOVL.A

;hL

NOW

HAS

GOOD

DATA

e~44

05

OCR

8

;RECUCE

CHAR CCUNT

8~4=

C22ce3

JNZ

WRDl

;::;.2.1.0

AND

OUT

-----8~4

~'------

EX--J

=r

:

E24€

7A

MOV

AtD

;~PD~T~

CHECKSUM

834<;

€5

A~D

L

;CRDEP

IMMATERIAL

834A

e4

ADD

H

;CHK

SUM

IN A CORRECT

------e~48___S.7-----.----~MUV.

___

_lD_4_.-#oA'-----;..CHECKSLJK_UPD.A..l.£-CUM~P'_l.L..1E~T--'E:..._---------

__________

_

834C

C1

POP

li

;r:;ESTORE

834D

CS

RET

S:;4E 834E

C5

-

____

..8.:

liJ:=:

__

·_O

c.e

0

8351

CDFIE2

83~4

DAtC83

82E7

CD1253

--.-.-------8~

= A

----4-7.--..

835E

CCF182

83='E

DA6Cc3

8361

C012e3

BYTE

INP.~lJ~T~~R_lTwN~~·

_______________

~

________________________________________

_

•

8YTIN:

PUSh

8

;SAVE

IT

________

MV_l

___

.L8c...s

•.

Q,

____

;..lN

LI_-1ilN

AR.Y-V.ALULBUEE..E.oR"--

__________________

_

CALL

EIT

;REAC

NEW

DIGIT

JC

EXITB

;L~AVE

IF

DELIMITER,A=B=O

CALL

~r8BL

;GET

eI~ARY

VALUE

IN

A

__

-------.MCLV"----

.....

l3

.......

A ;

S.A.V

L

.. G IN

AKY

__

V

ALu

t:..._lN-B

__ . ____

-'-

_________________

_

CALL

EIT

;REAC

2~D

(LO~)

DIGIT.

IF

ANY

JC

EXITB

;CUIT

IF

DELIMITER.

A=U=DIGIT

CALL

NIGBL

;COI\VFRT

2ND

DIGIT

TO

~INARY

8080

~ACRO

ASSEM8LER,

VE~

2.2

MCEM-8080

MC~ITCR

1.1

ERRORS

= 0

PAGE

20

-------------------------

~3E4

4F

MOV

C.A

;SAVE

CHAR

E 2 C

= 7 e

I'

0 V A , B ; GET F I H S T ( H A R

e~~e

07

PLC

;NO~E

TC

TOF

CHAR

-----c::t

t---G7-

---·---RLG--------------

€2EE

07

RLC

E'::fS

C7

RLC

E2c~

61

CRA

C

;OR

IN

FIRST

CHAR

-E2t£

4

7----------'-'--MG'\l-J----iB:l-o"'"

.A-fl----T;-S-A-VE-l-N---l3------~-----------------------

E36C

EXIT8:

82fC

78

MOV

A,B

;IN

CftSE

A~OLCS

OELIM

CHAR

8260

82

ADD

0

;ADC

CHECKSGM

------82Hii---S7

-------III4Q.v

D

,A

;+t:'-T-l,kN--UPD-,d.f:-E~UM_----------------------

e.::eF

7€

MOV

A,B

;RESTO~E

SA

FROM

$B

E27C

C1

POP

B

;RESTORE

B

e~71

CS RET

--o:-------...;j;E--l--DOl\;c---t:;!...-S~£_-----------------------

8YT E OUT

FUT ~ TN

CUTPUTS

2

H~X

ASCII

CCDED

DIGITS

---·------'-...;--HR~.w:NAT-E-S--R-R-I-N-T-F_·l_Ek.D-_W_I-1H--SPA_CE-·------------------'----------

E272

EYTOT:

8272

C~

¢USH

E

;CALLS

USE

58

-----~7

-3,--,-C

O--'"l.B~~----

__

-CAL_,-1

----08-+T~0I_Tlhl

........

-~;.c£c.nc(

~ t-EX---,DU-J.I-I.GhII.-T~5

______________________

_

8276

CD0481

CALL

S~ACO

;FRI~T

A

SPACE

TRAIL~R

C27S

C1

POP

(j

;t:.lSTCRE

837A

C9

RET

.

----------------~.-----.""----.-.------

BASIC

RYTE

OUTPUT

OECCDEH

RT~

FERFO~MS

SUMCHECK

AOOITIO~

ON

OUTPUT

;

HIGh

CROEF<

UIGIT

OUTFUT

FIRST

-----,----------------,t--i.L.-b-CW-G-FD-E-~E

~

01

c;

IT

0

L.

:rP~-~SECQ..l'I;O---------------------------

E27E

e27E

47

----~S~7C__-e2_

E'::7C

57

e37E

78

E37F

07

----cS.::.-C

C

07

8'::

81

07

8282

07

8283

C08783

8.-:.at

7€

•

ETOT

1:

MOV

B.A

;SAVE

8YTE

IN

B

ADD.---

....

().J-----

;.A

LJC--TO--

C

HE.CKSUM...------

-----------------

MOV

O.A

;SAVE

NE~

SLM

MOV

A.8

;~ET~IEVE

BYTE

RLC

;SWAP

HEX

DIGITS

-RLC~

__

-----------------

___

--------------

RLC

CALL

HXOUT

;FRI~ED

w/HIGH

DIGIT

_---1>'.DVJl.

___

~A

.......

_cB'__

____

;

-1.-1

NS.J.E.A.D-Ol=-sH.LEI.

.......

MxuD

........

V

____________________

_

;FALL

THRU

TO

HXOUT

HE)<

OUTPLT

RTN

------------~curJ;.U.r_S_..A.S_C

r I COD

ED

r.E-.lCru

Gl.!

FRCM

LOW

4

~ITS

OF A

REGISTER

,

8'::87

HXOUT:

;C-9,A-F

NOT

CONTIG-

8080

~ftC~C

ftSSEMBLER,

vER

2.2

MCE~-8080

MCNITO~

1.1

ERRORS

= 0

PAGE

21

-------------------------------------------------------------

;UOUS

CaD~S, 2 CAS~S

E3B7

EtCF

ANI OFH

;~T~IP

hIGh

DIGIT

a2a~

DtCA

SUI

OAH

:>9

TEST

-----------

c:::

€

8----F £ <;483---------.JP--------HXG1-----.

2P

/lI'\.CH--.GE.-l 0 ---

-

e'::Et

Ct':.3A

ADI

19'+1

;AOD

;\SCI1

<;

+1

FOR

;ASCII

CHAR

COCE

O~

#

e~~c

4F

MDV

e.A

;F~I~E

P~GUMEI'\.T

FCR

CALL

-----------B.:;9-1----C-3-C6-&1-----------JMP----CG----.-;CU-TPUL-IX--AND-RE-T

83<;4

HX01:

;LETTE~

CASE

82<;4

C641

ADI

'A'

;ADD

ASCII

'A'

FeR

------8-3

<;.-tc---44

F-~-------

8::<;,

C.3C6E1

;ftSCII

COOt

OF

DIGIT

-Mav---->.c~'t_.

A.A-----.:

F

R--I

ME-A

RG

1.;,'.1

E

N-T--F-DR--CAA~L~L~------

__

-----------------------------

~MP

CO

;CUTFUT

AND

RET

;~O

ERkCR

ON

INPUT

;FOSSIRLE.

so

NO

CHKS

------------------~-------

----------

--------------------------------------------

TVPE

~ESSAGE ~OUTINE

(HL)

FaINTS

TO

MESSAGEAOO~ESS

MESSAGt

TERMINATED

BY

~rGATIVE

BYTE

E::SJo

TYPMG:

a'::SA

C5

PUSH

H

;FRI~T

PREFACE

MSSG

82<;E

21A083

LX!

H.CRMG

;POI~T

TO

PHEFACE

.----Q.6.~~r;;E--_I"C.~O,).,AI4:.2._c;c;:...-J.l__-----

____

C.ALL

___

-'T-J"'-=8""1

___

-..;nCR4_LF-+--c--._.~

_____________________________

--,--

_____

_

82A1

E1

POP

H

;~OI~T

TO

1ST

MSSG

AGN

;fALL

THRU

AND

P~INT

S3A2

TYPl:

---------S-~~--1E-----------lMO'V

___

_'A

.......

...M'-------+:.£E..-r-cJ-i-C.!cIAR-~E-M-----------_-----------------

1 +

TEST

;CHK

IT

1ST,

E~A3

1

A?

+

ANA

A

;SET

FLAGS

, CY=O

e~A4

Fe

~M

;~EGATIVE

IMPLIES

END

------

8JA5

4-F-

MOV

C.

A

';-FR.I-~I-~

S:;,A6

C00681

CALL

CO

;PUT

IT

OUT

a:::A9

23

INX H

;PCI~T

TC

----e::.AA----C

::.A2B-..l-----

.JMP-'-----+T~'(

F 1

:-UJ-CF

T I

L.1.-~E~G~C~ht:t_AA-PRe_-------------------------

83,AC

oeCAooan

C~MG:

DB

CR.LF,O.O.O,O,-l

E3B1

O::JCOFF

83Q4

3AFF

CRCO:

DB

':',-1

----------J:

38

6---2

r;

FF

-----P-M-'!

14-G-:---CdO'------!·

.....

o-!-·

+.

=-Jll.----------------------------------,.----,-------

S::EE

4:::::84954

RSMG:

CE

'EXIT'

,-1-

B2t:C

2CFF

S:::EE

C0450A41

EOTAe:

Db

O.·E'

,LF,

'A

SIU'

,CR,'

DRJNFCK'

'"

-_.

__

..

_--12.

~

C

Z----20!::

3 4

~

5.5

8'::Ct

OD44!:24A

e:;CA

4E46434B

t1::CI::

54~A4C57

DB

'TZLWHYFCCBG',OAOH,'MXV',80H

----··-------8

3D

~-4

~5.g5

05.1--.

-----------

-----------'----------------------

t2Ct

4F4247AO

e:;l.)A

40585680

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The

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HAL

without

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Model

Communications

BOARD

following

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circuit

incurring

The

diagrams

of

HAL

LAYOUT

pages

Microcomputer

connections

reserves

any

obligation

may

Communications Corp.

AND

contain

as

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not

be

of

right

duplicated

SCHEMATIC

complete

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to

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diagrams

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make

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in

DIAGRAMS

of

the

These

changes changes

any form

date

diagrams

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in in

HAL

reflect

this

manual.

the

circuitry

previously

without

Communications

the

sold

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express

8-1

MCEM-8080 Addendum

June,

Use

of

ribbon

No.

1976

the

The

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cable

Processor

in

Table

2.6

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to

al

ign

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32

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connector.

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connector

on page

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2-12

1).

correctly

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This

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manual

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bare

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connections

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into

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arrows

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40

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(Universal

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cable

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sure

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it

connector

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FOOT attached 3417-0000,

to

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to

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Communications Corp. a

3M

no.

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is

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best dragging

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attached

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required.

FURNISHED.

cable.

obtained

for

$6.00.

connector

it

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to

the

3M

connector

connectors

cable

side

of

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be

determined

of

which

Figure 2 for

can

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at

$4.00

directly

same

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to

polarity

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3M

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to

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is

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heavier by

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the

simply

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same

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circuit

HAL.

the

cable

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pin 1 of

on

one

at

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across

therefore

following

required, NOT

BE

EXTENDED

3M

connector

part

or

from

board

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connector cable

several

procedure

in two ways:

the

UPB

connector

side

END

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has

than

of

two

the

instructions.

the

conductors

and

then

can be

no.

HAL

connector

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the

other.

the

cable,

sides

heavier

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is

will

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larger clamp the

section

strip

protective

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the

connector

with

has a

protective

strip

between

connector

the

connector

is

removed

the

forks

to

the

(3M

cable

No.

paper

to

of

3417-0000) pins

and a covering expose

the using

the

connector

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is a two-piece

smaller

over

adhesive

pins

following

an

adhesive.

clamp

and

procedure:

assembly,

strip. the

the

clamp

The

In

assembly,

cable

strip.

the

is

I.

2.

Locate conductor on the several the

Carefully from

and mark

the

same

cable, end-most

the

cable.

cable

allowing

connectors

connector

remove

clamp

piece.

desired

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since

it

are

the

connector

that to has

protective

several

the

connectors

pass

intended,

been

connectors

through.

do

not

installed.

paper

location

simply

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cut

BUT

NOT

clamp

the

on

the

can be

cable

adhesive

40

placed

around

if

until

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ribbed the

4.

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indicates

5.

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of

the

6.

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fingers

into

7.

RECHECK

8.

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in a bench between

If

scratching

the

side

paper

the

cable

red

the

a.

The

b.

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c.

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checking.

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of

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the

location

section

from

stripe

guide

section

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cable.

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the

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connector

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cable -too

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of

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surface

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ribbon

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on

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stripe

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arrow

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two

on

of

pin I of

of

the clamp cable.

the

press

of

the

CONNECTOR of

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side

is

perpendicular sections

only

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enough

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the

clamp

taking

with

the

connector

the

connector

assembly,

clamp

cable

pressure

by

piece

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two

connector

ALIGNMENT

is

of

the

can

pressure

jaws, using

piece

care

it.

connector.

on

the

aligning

into

pieces

pins

TO adjacent cable

to

the

be

completely

to

will

you cardboard

break

may

on

the the

to

remove

section.

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the

mating

together

start

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SURE

to

is

against

cable.

close

the

wish

protective

heavily

only

arrow

with

to

"bite"

THAT:

the

arrow

the

pressed

the

connector.

to

prevent

This

side

with

holes

your

clamp.

together

gaps

shims.

9.

If

additional

any

cable

to

end

razor-blade

the

connector. connector the

cut together

)0.

The

completed piece Notice

odd numbers

numbers on

the

of

that

location

and

edge

in

No.

connectors

cable

and

cut Be

not

to

be

the

process

connector

22

bare

the

numbers

down

the

other

using

after

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careful

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sure

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are

the

cable

the

that

of

should

wire

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required,

the

above

connector,

off

to

cut

processor

adjacent

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now

into

connector

marked on

side

{starting

they

procedure.

use a VERY

flush

on

with

the

"scrap"

end!

be keyed by

After

wires

the

face

at

can be

If

SHARP

the

outside end

cutting,

have

not

inserting

no.

32

of

the

arrow} and

attached

it

is

knife

of

been

position.

the

connector

at

desired

or

edge

the

inspect

shorted

a

short

even

of

-

40

conductor

cable

1 1

oca

t i

ng

of

connector

a.

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1

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strip

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side

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cable

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d.

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Figure

2.

Preparation

-10

O[;J

El

--------------"

Cut

excess

of

cable

UPB

along

Cable

this I ine

Connector

with

razor

blade

Hal Communications MCEM-8080 Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual