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MDX340C/FOREX386

SPRING CIRCLE COMPUTER, INC.

MDX340C/FOREX386

Processor

80386DX

Processor Speed

33/40MHz

Chip Set

Forex

Max. Onboard DRAM

32MB

Cache

32/64/128KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP2

Speaker

JP10

Turbo LED

JP7

Turbo switch

JP11

Reset switch

JP8

32-bit external memory card

S1

Power LED & keylock

JP9

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP3

Open

 

Monitor type select monochrome

JP3

Closed

NPU mode select synchronous with CPU

JP5

pins 1 & 2 closed

 

NPU mode select synchronous with oscillator installed at Y1

JP5

pins 2 & 3 closed

Factory configured - do not alter

JP6

N/A

External battery select 6.0VDC

JP200

Open

 

External battery select 3.6VDC

JP200

Closed

CMOS memory normal operation

JP202

Open

 

CMOS memory clear

JP202

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

NONE

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

Note:Banks 2 & 3 are used when a 32-bit external memory card is installed.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

Tag (U15)

Tag (U16)

32KB

(4) 8K x 8

NONE

(1) 8K x 8

NONE

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 32K x 8

NONE

CACHE JUMPER CONFIGURATION

Size

JP6

32KB

pins 1 & 2 closed

64KB

pins 2 & 3 closed

128KB

pins 2 & 3 closed