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GMB-486UNP (VER. 3.01)

VEXTREC TECNHOLOGY, INC.

GMB-486UNP (VER. 3.01)

Processor

CX486S(WB)/CX486S(WT)/CX486S2(WB)/CX486S2(WT)/80486SX/ 80487SX/CX486DX(WB)/CX486DX(WT)/CX486DX2(WB)/CX486DX2(WT)/80486DX/80486DX2/P24T

Processor Speed

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

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

None

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J2

Turbo switch

J51 pins 15 - 17

Power LED & keylock

J51 pins 1 - 5

Reset switch

J51 pins 19 & 20

Speaker

J51 pins 7 - 10

32-bit VESA local bus slots

SL1 - SL3

Turbo LED

J51 pins 12 & 13

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

Monitor type select color

JP32

Closed

 

Monitor type select monochrome

JP32

Open

CMOS memory normal operation

JP33

Pins 1 & 2 closed

 

CMOS memory clear

JP33

Pins 2 & 3 closed

Factory configured - do not alter

JP74

Unidentified

Factory configured - do not alter

JP75

Unidentified

Factory configured - do not alter

JP76

Unidentified

Factory configured - do not alter

JP77

Unidentified

VL-BUS clock adjust normal operation

JP118

Pins 1 & 2 closed

 

VL-BUS clock adjust reserved

JP118

Pins 2 & 3 closed

Factory configured - do not alter

JP121

Unidentified

Factory configured - do not alter

JP122

Pins 1 & 2 closed

Factory configured - do not alter

JP123

Open

Factory configured - do not alter

JP124

Open

Factory configured - do not alter

JP125

Open

Factory configured - do not alter

JXN

Pins 1 & 2 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) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

None

80MB

(4) 16M x 9

(4) 4M x 9

128MB

(4) 16M x 9

(4) 16M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

None

(1) 8K x 8

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

None

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP7

JP58

32KB

Open

Open

Pins 2 & 3 closed

64KB

Closed

Open

Pins 1 & 2 closed

128KB

Closed

Closed

Pins 1 & 2, 3 & 4 closed

256KB

Closed

Closed

Pins 1 & 2, 4 & 5 closed

CPU SPEED SELECTION

Speed

JP34

JP35

JP36

25MHz

Closed

Open

Closed

33MHz

Closed

Closed

Open

40MHz

Open

Open

Closed

50iMHz

Closed

Open

Closed

50MHz

Open

Closed

Open

66iMHz

Closed

Closed

Open

CPU TYPE SELECTION

Type

JP25

JP28

JP30

CX486S (WB)

Closed

Open

Pins 5 & 6 closed

CX486S (WT)

Closed

Open

Pins 5 & 6 closed

CX486S2 (WB)

Closed

Open

Pins 5 & 6 closed

CX486S2 (WT)

Closed

Open

Pins 5 & 6 closed

80486SX (PQFP)

Open

Open

Open

80486SX (PGA)

Closed

Open

Pins 5 & 6 closed

80487SX

Closed

Open

Pins 1 & 2, 4 & 5, 6 & 7 closed

CX486DX (WB)

Closed

Open

Pins 2 & 3, 4 & 5, 6 & 7 closed

CX486DX (WT)

Closed

Open

Pins 2 & 3, 4 & 5, 6 & 7 closed

CX486DX2 (WB)

Closed

Open

Pins 2 & 3, 4 & 5, 6 & 7 closed

CX486DX2 (WT)

Closed

Open

Pins 2 & 3, 4 & 5, 6 & 7 closed

80486DX

Closed

Open

Pins 2 & 3, 4 & 5, 6 & 7 closed

80486DX2

Closed

Open

Pins 2 & 3, 4 & 5, 6 & 7 closed

P24T

Closed

Open

Pins 1 & 2, 4 & 5, 6 & 7 closed

CPU TYPE SELECTION (CONT)

Type

JP70

JP72

JP80

JP120

CX486S (WB)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

Open

CX486S (WT)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

CX486S2 (WB)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

Closed

CX486S2 (WT)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Closed

80486SX (PQFP)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

80486SX (PGA)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

80487SX

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

CX486DX (WB)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

Open

CX486DX (WT)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

CX486DX2 (WB)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

Closed

CX486DX2 (WT)

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Closed

80486DX

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

80486DX2

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

P24T

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open