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





FOREX 486/50

MICRO EXPRESS, INC.

FOREX 486/50

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

25/33/50(internal)/50/66(internal)MHz

Chip Set

FOREX

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit local bus card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J2

Turbo switch

J15

Reset switch

J8

Turbo LED

J16

Power LED & keylock

J9

32-bit local bus card

S1

Speaker

J10

 

 

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP6

Open

 

CMOS memory clear

JP6

Closed

Local bus speed select < 33MHz

JP20

Open

 

Local bus speed select ³ 33MHz

JP20

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U1)

TAG (U2)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

SRAM JUMPER CONFIGURATION

Size

JP8A

JP8B

JP8D

JP8E

JP8F

64KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

128KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

256KB

2 & 3

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP12

JP13

JP30

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed