SOFTSYS COMPUTER CENTERS, INC.

80386SX

Processor

80386SX

Processor Speed

8/16MHz

Chip Set

C & T NEAT

Max. Onboard DRAM

8MB

SRAM Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo LED

J5

Speaker

J2

External battery

J6

Turbo switch

J3

Auxiliary keyboard

J7

Reset switch

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

NPU mode select synchronous with CPU

JP4

JP6

open

pins 2 & 3 closed

 

NPU mode select asynchronous with CPU

JP4

JP6

closed

pins 1 & 2 closed

 

NPU enabled

JP5

closed

 

NPU disabled

JP5

open

»

BIOS ROM type select 27256

JP7

pins 1 & 2 closed

 

BIOS ROM type select 27512

JP7

pins 2 & 3 closed

»

Monitor type select monochrome

JP8

pins 2 & 3 closed

 

Monitor type select color

JP8

pins 1 & 2 closed

»

8042 switch CPU speed select pin 23

JP9

pins 1 & 2 closed

 

8042 switch CPU speed select pin 30

JP9

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0(SIMM)

Bank 1 (SIMM)

Bank 2 (DIP)

Bank 3 (DIP)

512KB 1

(2) 256K x 9

NONE

NONE

NONE

512KB 2

NONE

NONE

(18) 41256

NONE

1MB 1

(2) 256K x 9

(2) 256K x 9

NONE

NONE

1MB 2

NONE

NONE

(18) 41256

(18) 41256

1.5MB 1

(2) 256K x 9

(2) 256K x 9

(18) 41256

NONE

1.5MB 2

(2) 256K x 9

NONE

(18) 41256

(18) 41256

2MB 1

(2) 256K x 9

(2) 256K x 9

(18) 41256

(18) 41256

2MB 1

(2) 1M x 9

NONE

NONE

NONE

2MB 2

NONE

NONE

(18) 411000

(18) 411000

4MB 1

(2) 1M x 9

(2) 1M x 9

NONE

NONE

4MB 2

(2) 1M x 9

NONE

(18) 411000

(18) 411000

5MB 1

(2) 1M x 9

(2) 1M x 9

(18) 41256

(18) 41256

5MB 1

(2) 1M x 9

(2) 1M x 9

(18) 411000

NONE

5MB 2

(2) 1M x 9

(2) 1M x 9

(18) 41256

(18) 41256

6MB 1

(2) 1M x 9

(2) 1M x 9

(18) 411000

(18) 411000

6MB 2

(2) 1M x 9

(2) 1M x 9

(18) 411000

(18) 411000

8MB 1

(2) 4M x 9

(2) 4M x 9

NONE

NONE

Note 1 :Jumpers JP1 and JP2 pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10,and 11 & 12 closed.

Note 2 :Jumpers JP1 and JP2 pins 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, and 6 & 7 closed.