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





MB-6U(MB-450CBU)

JETPRO INFOTECH COMPANY, LTD.

MB-6U(MB-450CBU)

Processor

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

Processor Speed

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

Chip Set

UMC

Max. Onboard DRAM

64MB

SRAM Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit proprietary local bus card

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J5

Power LED & keylock

J9

Turbo LED

J6

External battery

J11

Turbo switch

J7

32-bit proprietary local bus card

S1

Speaker

J8

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

W1

closed

 

CMOS memory clear

W1

open

Monitor type select color

W2

closed

 

Monitor type select monochrome

W2

open

Factory configured-do not alter

W3

open

Tag mode select write back enabled (tag installed at U45)

W15

open

 

Tag mode select write back disabled (tag not installed at U45)

W15

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 JUMPER CONFIGURATION

Size

OSC2

W5

W10

W11

W19

W22

80386DX/25

50MHz

open

N/A

N/A

open

N/A

80386DX/33

66MHz

open

N/A

N/A

open

N/A

80386DX/40

80MHz

open

N/A

N/A

open

N/A

80486SX/20

20MHz

open

open

pins 1 & 2

closed

1 & 2 and 3 & 4

80486SX/20

40MHz

open

open

pins 2 & 3

closed

1 & 2 and 3 & 4

80487SX/20

20MHz

closed

pins 2 & 3

pins 1 & 2

closed

1 & 2 and 3 & 4

80487SX/20

40MHz

closed

pins 2 & 3

pins 2 & 3

closed

1 & 2 and 3 & 4

80486DX/25

25MHz

open

pins 1 & 2

pins 1 & 2

closed

1 & 2 and 3 & 4

80486DX/25

50MHz

open

pins 1 & 2

pins 2 & 3

closed

1 & 2 and 3 & 4

80486DX/33

33MHz

open

pins 1 & 2

pins 1 & 2

closed

1 & 2 and 3 & 4

80486DX/33

66MHz

open

pins 1 & 2

pins 2 & 3

closed

1 & 2 and 3 & 4

80486DX/50

50MHz

open

pins 1 & 2

pins 1 & 2

closed

1 & 2 and 3 & 4

Note:Pins designated should be in the closed position

NPU JUMPER CONFIGURATION

Size

W8

W20

80387

closed

closed

3167

open

open

SRAM JUMPER CONFIGURATION

Jumper

32KB

64KB

128KB

256KB

W12

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

W13

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

W14

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

W15

open

open

open

open

W17

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

W18

N/A

N/A

pins 1 & 2 closed

pins 2 & 3 closed

SRAM CONFIGURATION

Size

Cache

Locations

TAG

32KB

(4) 8K x 8

Bank 0

(4) 16K x 4

64KB

(8) 8K x 8

Banks 0 & 1

(4) 16K x 4

128KB

(4) 32K x 8

Bank 0

(4) 16K x 4

256KB

(8) 32K x 8

Banks 0 & 1

(4) 16K x 4