...because we can't all be on the bleeding edge...





MODEL 2020

JC INFORMATION SYSTEMS CORPORATION

MODEL 2020

Processor

80386DX

Processor Speed

25/33MHz

Chip Set

C & T PEAK/DM

Max. Onboard DRAM

32MB

Cache

64KB

BIOS

C & T/Phoenix

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot

NPU Options

80387

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J4

Speaker

SPK

Power LED & keylock

KEYL

Self test

TEST

Reset switch

RSW

Turbo LED

TLED

32-bit external memory card

S1

Turbo switch

TSW

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

W2

open

Factory configured - do not alter

W3

pins 1 & 2 closed

Factory configured - do not alter

W6

closed

Factory configured - do not alter

W9

pins 2 & 3 closed

CMOS memory normal operation

W10

pins 2 & 3 closed

 

CMOS memory clear

W10

pins 1 & 2 closed

Monitor type select color

W11

closed

 

Monitor type select monochrome

W11

open

Note:The locations of W2, W3, W6, and W9 are unknown.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

W4

1MB

(4) 256K x 9

NONE

pins 1 & 2 closed

2MB

(4) 256K x 9

(4) 256K x 9

pins 1 & 2 closed

4MB

(4) 1M x 9

NONE

pins 1 & 2 closed

5MB

(4) 1M x 9

(4) 256K x 9

pins 2 & 3 closed

8MB

(4) 1M x 9

(4) 1M x 9

pins 1 & 2 closed

16MB

(4) 4M x 9

NONE

pins 1 & 2 closed

32MB

(4) 4M x 9

(4) 4M x 9

pins 1 & 2 closed

CACHE CONFIGURATION

Size

Cache CACHE

Location

TAG

64KB

(8) 8K x 8

CACHE

(2) 16K x 1