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





MB-4F

JETPRO INFOTECH COMPANY, LTD.

MB-4F

Processor

80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

FOREX

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI/AWARD

Dimensions

220mm x 340mm

I/O Options

None

NPU Options

80387

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP2

Turbo switch

JP15

Reset switch

JP8

Turbo LED

JP16

Power LED & keylock

JP14

Speaker

JP17

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Parity check enabled

JP5

closed

 

Parity check disabled

JP5

open

Monitor type select color

JP6

closed

 

Monitor type select monochrome

JP6

open

Factory configured - do not alter

JP19

open

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

CPU TYPE CONFIGURATION

CPU

JP12

JP13

JP30

W1A-W1G

W2A-W2H

80486DX2

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

80486DX

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

80487SX

pins 1 & 2

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

80486SX

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 1 & 2

80386DX

N/A

N/A

N/A

pins 2 & 3

pins 2 & 3

Note:Pins designated should be in the closed position.

SRAM CONFIGURATION

Size

Cache SRAM

Location

TAG(U26)

TAG(U42)

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

NONE

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

NONE

256KB

(8) 32K x 8

Banks 0 & 1

(1) 8K x 8

(1) 8K x 8

Note:The exact locations of U26 and U42 are unknown.

SRAM JUMPER CONFIGURATION

Size

JP8A

JP8B

JP8C

JP8D

JP8E

JP8F

64KB

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 2 & 3

pins 1 & 2

128KB

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

256KB

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 2 & 3

Note:Pins designated should be in the closed position.