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80386SX

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.