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GMB-486UN

ROBOTECH, INC.

GMB-486UN

Processor

80486SX/80486DX/80486DX2

Processor Speed

25/33/50/66MHz

Chip Set

UMC

Max. onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

CN1

Reset switch

CN6

Turbo LED

CN4

Speaker

CN7

Turbo switch

CN5

Power LED & keylock

CN8

USER CONFIGURABLE SETTINGS

Function

Switch

Setting

Ľ

CMOS memory normal operation

JP2

1 & 2 closed

 

CMOS memory clear

JP2

2 & 3 closed

Ľ

Hardware Emulate KBGA20

JP10

1 & 2 closed

 

Keyboard controller 8042

JP10

2 & 3 closed

Ľ

Monitor type select color

JP12

Closed

 

Monitor type select monochrome

JP12

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) 1M x 9

(4) 1M x 9

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

EPROM TYPE CONFIGURATION

CPU

JP3

JP7

JP9

JP13

80486SX-25

2 & 3

Open

2 & 3

2 & 3

80486DX-33

1 & 2

1 & 2

1 & 2, 3 & 4

1 & 2

80486DX-50

2 & 3

1 & 2

1 & 2, 3 & 4

1 & 2

80486DX2-50

1 & 2

1 & 2

1 & 2, 3 & 4

1 & 2

80486DX2-66

1 & 2

1 & 2

1 & 2, 3 & 4

1 & 2

Note: Pins designated should be in the closed position.

CACHE TYPE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

NONE

(1) 8K x 8

64KB

(4) 8K x 8

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 SIZE CONFIGURATION

Size

JP22

JP23

JP25

JP26

32KB

2 & 3

Open

2 & 3

2 & 3

64KB

1 & 2

1 & 2

1 & 2, 3 & 4

1 & 2

128KB

2 & 3

1 & 2

1 & 2, 3 & 4

1 & 2

256KB

1 & 2

1 & 2

1 & 2, 3 & 4

1 & 2

Note: Pins designated should be in the closed position.

CACHE SIZE CONFIGURATION (CONíT)

Size

JP27

JP28

32KB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10

Open

64KB

Open

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10

128KB

Open

Open

256KB

Open

Open

Note: Pins designated should be in the closed position.

CACHE SIZE CONFIGURATION (CONíT)

Size

JP29

JP30

32KB

Open

Open

64KB

Open

Open

128KB

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10

Open

256KB

Open

1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10

Note: Pins designated should be in the closed position.