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FOREX 386/486 (REV. B2/B3)

MICRO EXPRESS, INC.

FOREX 386/486 (REV. B2/B3)

Processor

80386DX/80486SX/80487SX/80486DX /80486DX2

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

FOREX

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387DX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP2

Speaker

JP10

Reset switch

JP8

Turbo switch

JP15

Power LED & keylock

JP9

Turbo LED

JP16

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

2E

N/A

»

Factory configured - do not alter

JP5

N/A

»

CMOS memory normal operation

JP6

Open

 

CMOS memory clear

JP6

Closed

Note: The location of JP5 is unidentified.

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 0

TAG 1

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

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8A

JP8B

JP8C

JP8E

JP8F

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

Note: Pins desingated 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

CPU TYPE CONFIGURATION

Type

1A

1C

1D

1E

1F

1G

2A

80386

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

80486

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position. The location of W1X & W2X are unidentified.

CPU TYPE CONFIGURATION (CON’T)

Type

2C

2D

2G

2H

W1B

W1X

W2X

80386

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

80486

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position. The location of W1X & W2X are unidentified.

CPU CLOCK SPEED CONFIGURATION

Speed

JP7A

JP7B

JP7C

JP7D

20MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

25MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

40MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

50iMHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

50MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

66iMHz

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

80MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed