HwMuseum | Index

FOREX COMPUTER CORPORATION

80386SX-25/33

Processor

80386SX

Processor Speed

25/33MHz

Chip Set

Forex

Max. Onboard DRAM

16MB

Cache

16/64KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP2

Power LED & keylock

JP9

Turbo LED

JP7

Speaker

JP10

Reset switch

JP8

Turbo switch

JP11

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select monochrome

JP3

Closed

 

Monitor type select color

JP3

Open

»

Factory configured - do not alter

JP12

Closed

»

CMOS memory normal operation

JP13

Open

 

CMOS memory clear

JP13

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

3MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

5MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

(2) 1M x 9

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

NONE

NONE

9MB

(2) 256K x 9

(2) 256K x 9

(2) 4M x 9

NONE

10MB

(2) 1M x 9

(2) 4M x 9

NONE

NONE

12MB

(2) 1M x 9

(2) 1M x 9

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

NONE

NONE

CACHE CONFIGURATION

Size

Bank 0

TAG (U15)

TAG (U16)

16KB

(2) 8K x 8

NONE

(1) 8K x 8

64KB

(2) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION

Size

JP6A

JP6B

16KB

pins 1 & 2 closed

pins 1 & 2 closed

64KB

pins 2 & 3 closed

pins 2 & 3 closed