Plexus_P15_P20_Brochure_1985 Plexus P15 P20 Brochure 1985

Plexus_P15_P20_Brochure_1985 Plexus_P15_P20_Brochure_1985

User Manual: Plexus_P15_P20_Brochure_1985

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Plexus

Computers,

Inc.

The

Plexus

P/

lS

and

P/

20

are

powerful

16

/32-bit

su-

per

micmcomputers

specifically

designed

for

th

e

popular

UNIX

operating

system.

The

PIlS

supports

8

usel's

and

the

P/

20

with

the

addi-

tion

of

the

Intelligent

Communications

Pmcessor

(rCP)

extends

this

configurability

to

16

users

.

Both

are

ideal

for

applications

that

demand

high

pmcessor

peIformance

and

fast

tem.inal

J'esponse.

They

offer

superior

pel'formance

,

reliability,

and

industry-

standard

haJ'dware

and

software

inteIfaces

for

maxi-

mum

OEM flexibility.

Both

systems

employ

a

powerful

micmpmcessor

design

featuring

two

MC68010

micmpmcessors,

a

large

main

memory

,

and

a

wide

selection

of

industry-

standard

S.2S-inch

peripherals

with

high

speed

int

el-

ligent

contmllers.

This

design

closely

links

the

multiprocessor

architecture

with

a

tuned

implemen-

tation

of

the

UNIX

operating

system

to

ensure

maxi-

mum

multiuser

pelformance.

For

enhanced

OEM flexibility,

the

systems

use

the

industr

y

standard

Small

Computer

Systems

Interface

(SCSI)

for

connecting

periphel'al

devices.

This

allows

them

to

be

configured

with

a

wide

range

of

Winches-

ter

disks

,

floppy

disks

and

ca

l

'tddge

tape

drives.

The

P/

lS

and

P/

20

run

SysS.2,

the

Plexus

implementa-

tion

of

UNIX

system

V

release

2,

along

with

many

industry-standard

pmgramming

languages,

making

them

compatible

with

a

wide

variety

of

ex

i

sting

appli-

cations.

They

are

software

compatible

with

all

other

members

of

the

Plexus

family

allowing

a

smoo

th

upgrade

path

as

computing

requirements

expand

.

J

i

P/15-P/20

Computer Systems

Models 1015A/1020A

FEATURES

Performance

D

Multipl'ocessor

architectul'e

D High

performance

68010

processors

D

Up

to

2

Mbytes

of

main

memory

D

Dedicated

68010 110

pmcessOl

'

D

Fu

ll SCSI

disk

inteIface

D Up

to

152

Mbytes

of

Winchester

disk

storage

D

Floppy

disk

standard

D

Streaming

cartddge

tape

optional

Reliability

D Pal'

ity

en'or

contml

in

main

memory

D

Ermr

checking

and

con'ecting

disk

memory

D

Extensive

use

of

VLSI

circuitry

D

10

,

000-hour

MTBF

disk

drives

D

UNIX

SysS.2

operating

system

D

Modular

design

for

easy

service

Compatible

Hardware

D

Industly-standard

pel'iphel'al

inteIfaces

D

Industry-standal

'd

communica

tion

s

Standard

Software

D SysS.2

runtime

opel'ating

system

D

Industly-standard

languages

Designed

for

the

Office

D

Quiet

D

Compact

size,

office

compatib

le

D

Uses

standard

AC

power

MULTIPROCESSOR

DESIGN

The

high

performance

of

the

machines

is

made

possi-

ble

by

a

special

multipmcessor

architectul

'e

opti-

mized

for

the

UNIX

opemting

system.

The

architectul'e

links

a

powerful

16

/

32-bit

job

pmcessor

with

a

second

16/32

-bit

110

pmcessor

of

equal

power

to

remove

110

pmcessing

overhead

fmill

the

job

pmcessor.

During

system

operation

,

the

job

pmcessor

peIfOl'

ms

application

processing

and

oper-

ating

system

functions

while

the

second

processol

'

supervises

all

disk

and

magnetic

tape

110

as

well

as

handling

the

tl'ansfer

of

all

data

thmugh

the

serial

lIO

ports.

PERFORMANCE

PERIPHERALS

SCSI

Peripheral

Bus

The

P/

lS

and

P/

20

incorporate

a full

implementation

of

the

state-of-the-art

Small

Computer

Systems

Intel~

face

as

the

pel'ipheral

bus

in

the

sys

t

em.

This

ANSI

standard

bus

is

modeled

after

similar

implementa-

tions

that

are

widely

used

in

large

mainframe

com-

puters.

The

SCSI

bus

allows

attachment

of

a

wide

variety

of

mass

storage

devices

via

intelligent

full

buf-

fered

contmllers

that

interface

each

device

to

the

SCSI

bus.

Each

device

con

tmll

el'

gains

control

of

the

SCSI

2

bus

when

it

wishes

to

transfer

data.

The

data

is

trans-

ferred

to

or

from

main

memory

via

a DMA

operation

on

the

I/O

bus.

This

architecture

insures

optimum

use

of

all

devices

on

the

bus

regardless

of

their

speed.

In

addition

to

its

performance

advantages,

SCSI

provides

device

independence

by·

allowing

the

Job

and

110

processors

to

address

the

peripherals

with

standard

high-level

commands.

Fast,

High-Capacity

Disk

Drives

The

disk

subsystems

consist

of

one

or

two

5.Z5-inch

Winchester

disk

drives.

The

drives

can

be

chosen

from

a

family

with

a

wide

range

of

capacities

and

access

times.

Cartridge

'Thpe

Drive

When

high

speed

capacity

disk

backup

is

required,

the

system

can

be

configured

with

a 45

Mbyte

stream-

ing

tape

drive.

The

cartridge

tape

can

be

used

in

place

ot

or

in

addition

to,

the

standard

floppy

disk

unit.

BUILT-IN

RELIABILITY

The

PI15

and

P/ZO

design

addresses

the

most

com-

mon

of

computer

system

failure

and

employs

safe-

guards

against

loss

of

data

insuring

maximum

system

reliability.

RAM

Memory

and

Disk

The

system

utilizes

high-reliability

hermetically

sealed

memory

chips

for

maximum

MTBF

of

the

main

memory

subsystem.

Parity

error

control

consisting

of

one

bit

for

each

byte

of

main

memory

insures

detec-

tion

of

single-bit

data

errors.

The

disk

controller

protects

the

data

integrity

of

each

sector

with

a 3Z-bit

ECC

(error

correction

code)

allowing

data

errors

up

to

11

bits

in

length

to

be

detected

and

corrected.

This

correction

is

handled

automatically

by

the

controller

such

that

only

errop-free

data

reaches

main

memory.

Thmperature

and

Power

The

machine

also

allows

the

connection

of

an

Unin-

terruptible

Power

Supply

(UPS)

between

itself

and

the

AC

main

power.

The

UPS

allows

normal

operation

to

continue

during

brief

power

outages

and

provides

for

an

orderly

shutdown

during

lengthy

power

failures.

If

the

internal

temperature

should

pass

a

predeter-

mined

threshold,

an

over-temperature

sensing

circuit

alerts

the

job

processor

and

an

orderly

shutdown

may

be

initiated

to

save

all

data

before

a

critical

tempera-

ture

is

reached

and

a

system

failure

results.

P/15-P/20

System

Architecture

System

DRAM

Memory

MemOlY

Map

Serial

110

Job

Processor

Bus

8

Ports

SCSI

Interface

r----------------------------------,

I

I

I6-Bit

Intelligent

Communications

Other

Multibus

Other

Multibus

I

P/20

Only

L

_______________________________

J

VLSI

and

LSI

Circuitry

Extensive

use

is

made

of

state-of-the-art

VLSI

and

LSI

circuits

to

minimize

the

number

of

components

used,

resulting

in

an

inherently

more

reliable

system.

In

ad-

dition,

the

cabinet

is

designed

to

channel

cooling

air

to

all

parts

of

the

system

enclosure

thus

minimizing

component

heating

and

maximizing

component

life.

Sell

'lest,

Easy

Repair

The

P/15

and

P/20

subject

themselves

to

a

compre-

hensive

set

of

diagnostics

every

time

they

are

powered

on.

These

tests

exercise

every

major

subsystem

in-

cluding

both

processors,

main

memory,

and

all

pe-

ripheral

device

paths.

Repair

of

the

machines

is

facilitated

by

modular

design

and

construction

that

begins

with

the

easy

ac-

cess

cover

design

that

allows

removal

of

the

entire

system

outside

cover

with

only

two

screws.

All

system

modules,

including

the

single-board

of

systems,

are

easily

accessible

for

testing

or

replacement.

DESIGNED

FOR

THE

OFFICE

The

P 115

and

P 120

are

designed

for

ease

of

integration

into

the

office

environment.

The

dimensions

of

the

system

enclosures

allow

placement

of

the

system

in

a

variety

of

locations

which

include

both

under

work

tables

and

adjacent

to

desks.

The

systems

have

been

engineered

to

emit

very

little

sound

so

as

to

minimize

the

impact

on

office

environment

sound

levels.

The

enclosure

design

is

modern

and

the

neutral

colors

blend

well

with

any

office

decor.

SPECIFICATIONS

Job

Processor

Processor

Performance

features

User

Address

space

Floating-point

Clockl

calendar

Self-test

Memory

Capacity

Word

size

Access

Technology

Cycle

time

16/32-bit

MC68010

12.5

MHz

CPU

clock

Operates

with

no

wait

states

Shared

high

speed

memory

map

8

Mbytes

Conforms

to

proposed

IEEE

standard

Battery-powered

Standard,

via

on-board

PROMs

Up

to

2

Mbytes

16

bits

plus

2

parity

bits

Job

processor

bus

or

110

processor

bus

256K-bit DRAM

320

nsec

liD

Processor

Processor

Performance

features

PROM

memory

Static

RAM

16/32-bit MC68010

12.5

MHz

CPU

clock

64

Kbytes

16

Kbytes

8

Mbytes

Address

space

Self-test

Standard,

via

on-board

PROM

P/15-P/20

Communications

Standard

Serial

ports

8 (full-duplex)

standard;

all RS-232C 19.2

Kbaud

rate

P/.20

liD

Bus

Bus

Standard

Available Slots

Multibus

(IEEE 796)

3 (max.)

P 1.20

Communications

Option

Intelligence

16-bit

processor

Memory

32

Kbytes

RAM

(with

parity);

16Kbytes

PROM

Serial

ports

8 (full

duplex);

RS232C

in-

terface;

19.2

Kbaud

rate

(max.);

modem

support

on

all

ports;

hardware

support

for

async

and

bisync

protocols

Parallel

ports

1

Centronics-type

interface

Configurability

ICP (max.)

SCSI

Interface

P/15-P/.20

Subsystem

interface

SCSI

(ANSI

x

3T9.2/822)

Major

functions

Error

checking

and

recovery;

full SCSI

interface

functions,

multiple

channel

DMA

controller

Winchester

Disk

Subsystem

Drive

interface

ST506

compatible

Host

interface

SCSI

Configurability

2

drives

per

system

(maximum)

Subsystem

capacity

152Mb

(maximum)

Disk

drive

options:

Formatted

capacity

(Mb)

Positioning

time

(msec)

Rotational

latency

(msec)

1ransfer

rate

12'

24 28

83 83 33

8.3 8.3 8.3

625

Kbytes/sec

'P115

only

49

33

8.3

76

33

8.3

3

4

SPECIFICATIONS

(cont.)

Floppy

Disk

Subsystem

Disk

drive

Drive

interlace

Host

interlace

Configurability

Formatted

capacity

Positioning

time

(msec)

Thpe

Subsystem

Thpe

drive

Recording

density

Streaming

speed

Formatted

capacity

Subsystem

interlace

Controller

interlace

Recording

format

Configurability

5.25-in.

floppy

96

tracks

per

inch

Double

sided

double

density

SA451

compatible

SCSI

1

per

system

640Kbyte

94

Streaming

cartridge

(3M

style)

8000

bpi,

9

tracks

90

ips

45

Mbytes

SCSI

QIC-36

QIC-ll

1

drive

per

system

AC

Power

Required

115

VAC

230

VAC

Line

voltage

Line

frequency

Current

(max.)

IPILlEXIU~

115 VAC±10% 230 VAC±10%

60

Hz±5%

50

Hz±5%

Plexus

Computers,

Inc.

3833 North First Street

San

Jose,

CA

95134

408

• 943 9433

TWX/TELEX

910338

2223

PHYSICAL

CHARACTERISTICS

Overall

Dimensions

Width

Depth

Height

Other

Characteristics

Weight

Audible

noise

Heat

dissipation

Operating

Temperature

range

Relative

humidity

Regulatory

approvals

Altitude

Storage

temperature

range

in.

9.75

24

24

cm.

25

61

61

70lbs.

32

Kg

<

50db

(A)

1710

BTU/hr

431

KcaVhr

41F-95F

degrees

5C-35C

degrees

up

to

90%

non-

condensing

UL,

CSA,

FCC,

TUY,

VDE

up

to

10,000

feet

-40F-149F

degrees

-4°C-85C

degrees

UNIX

is

a trademark

of

AT&T Bell Laboratories.

Specifications subject to change.

Plexus

is

a trademark

of

Plexus Computers, Inc.

© 1984, 1985, Plexus Computers, Inc.

7.5Kl185

Printed in U.S.A. BB4?