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GMB-486SG (VER. 6.02)

GEMLIGHT COMPUTER, LTD.

GMB-486SG (VER. 6.02)

Processor

CX486S/UMCU5/80486SX/SL80486SX/CX486DX/80486DX/ SL80486DX/CX486DX2/AM486DX2/(SL)AM486DX2/80486DX2/ SL80486DX2/AM486DX4/(SL)AM486DX4/80486DX4/P24D/P24T

Processor Speed

20/25/33/40/50(internal)/50/60/66(internal)/75(internal)/ 80(internal)/100(internal)MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

None

Cache

128/256/512KB

BIOS

Award

Dimensions

250mm x 220mm

I/O Options

32-bit VESA local bus slots (3), green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

J6

Green PC connector

J2

Power LED & keylock

J7

Turbo switch

J3

Green PC connector

JP26

Turbo LED

J4

Green PC LED

JP27

Speaker

J5

32-bit VESA local bus slots

SL1 – SL3

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Turbo enabled

J3

Pins 2 & 3 closed

 

Turbo disabled

J3

Pins 1 & 2 closed

»

CMOS memory normal operation

JP16

Pins 1 & 2 closed

 

CMOS memory clear

JP16

Pins 2 & 3 closed

»

Monitor type select monochrome/VGA/EGA

JP17

Open

 

Monitor type select EGA

JP17

Closed

»

CLKIN delay for CPUCLK

JP20

Pins 2 & 3 closed

 

CLKIN & CPUCLK same phase

JP20

Pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

None

None

None

2MB

(1) 256K x 36

(1) 256K x 36

None

None

2MB

(1) 512K x 36

None

None

None

4MB

(1) 256K x 36

(1) 256K x 36

(1) 512K x 36

None

4MB

(1) 512K x 36

(1) 512K x 36

None

None

4MB

(1) 1M x 36

None

None

None

5MB

(1) 256K x 36

(1) 1M x 36

None

None

6MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

None

6MB

(1) 512K x 36

(1) 1M x 36

None

None

8MB

(1) 256K x 36

(1) 256K x 36

(1) 512K x 36

(1) 1M x 36

8MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

8MB

(1) 2M x 36

None

None

None

10MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

12MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

(1) 1M x 36

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

12MB

(1) 1M x 36

(1) 2M x 36

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 4M x 36

None

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 2M x 36

None

17MB

(1) 256K x 36

(1) 4M x 36

None

None

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

18MB

(1) 256K x 36

(1) 256K x 36

(1) 4M x 36

None

18MB

(1) 512K x 36

(1) 4M x 36

None

None

20MB

(1) 512K x 36

(1) 512K x 36

(1) 4M x 36

None

20MB

(1) 1M x 36

(1) 4M x 36

None

None

20MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

(1) 4M x 36

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

None

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 1M x 36

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

24MB

(1) 2M x 36

(1) 4M x 36

None

None

28MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

None

None

32MB

(1) 8M x 36

None

None

None

32MB

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

None

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

36MB

(1) 512K x 36

(1) 512K x 36

(1) 4M x 36

(1) 4M x 36

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

None

36MB

(1) 1M x 36

(1) 8M x 36

None

None

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

40MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

None

40MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

48MB

(1) 4M x 36

(1) 8M x 36

None

None

48MB

(1) 2M x 36

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 2M x 36

(1) 2M x 36

(1) 8M x 36

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 16M x 36

None

None

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

None

64MB

(1) 8M x 36

(1) 8M x 36

None

None

65MB

(1) 256K x 36

(1) 16M x 36

None

None

68MB

(1) 1M x 36

(1) 16M x 36

None

None

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

None

72MB

(1) 1M x 36

(1) 1M x 36

(1) 16M x 36

None

72MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

80MB

(1) 4M x 36

(1) 16M x 36

None

None

80MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

None

80MB

(1) 2M x 36

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 4M x 36

(1) 4M x 36

(1) 16M x 36

None

96MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

128MB

(1) 16M x 36

(1) 16M x 36

None

None

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

None

(1) 8K x 8

256KB (A)

(4) 32K x 8

(4) 32K x 8

(1) 16K/32K x 8

256KB (B)

(4) 64K x 8

None

(1) 16K/32K x 8

512KB

(4) 128K x 8

None

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP3

JP33

128KB

Pins 1 & 2 closed

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

256KB (A)

Pins 2 & 3 closed

Pins 2 & 3, 4 & 5 closed

Pins 2 & 3 closed

256KB (B)

Pins 1 & 2 closed

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

512KB

Pins 1 & 2 closed

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

CACHE TAG JUMPER CONFIGURATION

Cache

TAG

JP2

JP4

128KB

(1) 8K x 8

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB (A,B)

(1) 16K x 8

Pins 3 & 4 closed

Open

256KB (A,B)

(1) 32K x 8

Pins 2 & 3 closed

Pins 1 & 2 closed

512KB

(1) 32K x 8

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU SPEED SELECTION (AV9107-03)

Speed

JP5

JP6

JP7

20MHz

Closed

Open

Closed

25MHz

Closed

Closed

Open

33MHz

Open

Closed

Closed

40MHz

Closed

Open

Open

50iMHz

Closed

Closed

Open

50MHz

Open

Open

Closed

66iMHz

Open

Closed

Closed

75iMHz

Closed

Closed

Open

80iMHz

Closed

Open

Open

100iMHz

Open

Closed

Closed

CPU SPEED SELECTION (MS-8315)

Speed

JP5

JP6

JP7

20MHz

Open

Open

Open

25MHz

Open

Closed

Open

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Closed

Open

50MHz

Closed

Open

Open

66iMHz

Closed

Closed

Closed

75iMHz

Open

Closed

Open

80iMHz

Open

Closed

Closed

100iMHz

Closed

Closed

Closed

CPU TYPE SELECTION

Type

JP8

JP10

JP11

JP12

JP13

CX486S

2 & 3

2 & 3

Open

2 & 3, 4 & 5

Open

UMC U5

1 & 2, 3 & 4

2 & 3

1 & 2, 3 & 4

Open

Open

80486SX

2 & 3

2 & 3

Open

3 & 4

1 & 2

SL80486SX

2 & 3

2 & 3

Open

3 & 4

1 & 2

CX486DX

1 & 2, 3 & 4

2 & 3

3 & 4

2 & 3

Open

80486DX

1 & 2, 3 & 4

2 & 3

3 & 4

3 & 4

1 & 2

SL80486DX

1 & 2, 3 & 4

2 & 3

3 & 4

3 & 4

1 & 2

CX486DX2

1 & 2, 3 & 4

2 & 3

3 & 4

2 & 3

Open

CX486DX2 (3.6v)

1 & 2, 3 & 4

2 & 3

3 & 4

2 & 3

Open

CX486DX2 (4v)

1 & 2, 3 & 4

2 & 3

3 & 4

2 & 3

Open

AM486DX2 (3.45v)

1 & 2, 3 & 4

2 & 3

3 & 4

Open

Open

(SL)AM486DX2 (3.45v)

1 & 2, 3 & 4

2 & 3

3 & 4

1 & 2, 3 & 4

2 & 3

80486DX2

1 & 2, 3 & 4

2 & 3

3 & 4

3 & 4

1 & 2

SL80486DX2

1 & 2, 3 & 4

2 & 3

3 & 4

3 & 4

1 & 2

AM486DX4 (3.45v)

1 & 2, 3 & 4

2 & 3

3 & 4

Open

Open

(SL)AM486DX4 (3.45v)

1 & 2, 3 & 4

2 & 3

3 & 4

1 & 2, 3 & 4

2 & 3

80486DX4

1 & 2, 3 & 4

2 & 3

3 & 4

3 & 4

1 & 2

P24D

1 & 2, 3 & 4

1 & 2

3 & 4

1 & 2, 3 & 4

2 & 3

P24T

1 & 2, 3 & 4

1 & 2

2 & 3

3 & 4

Open

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)

Type

JP14

JP15

JP21

JP22

JP24

JP25

CX486S

1 & 2, 3 & 4

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

UMC U5

Open

Open

1 & 2

2 & 3

3 & 4

Open

80486SX

2 & 3

4 & 5

2 & 3

1 & 2

Open

Open

SL80486SX

2 & 3

4 & 5

2 & 3

1 & 2

Open

Open

CX486DX

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

80486DX

2 & 3

4 & 5

2 & 3

1 & 2

Open

Open

SL80486DX

2 & 3

4 & 5

2 & 3

1 & 2

Open

Open

CX486DX2

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

CX486DX2 (3.6v)

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

CX486DX2 (4v)

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

AM486DX2 (3.45v)

Open

Open

2 & 3

1 & 2

Open

Open

(SL)AM486DX2 (3.45v)

2 & 3

4 & 5

1 & 2

1 & 2

5 & 6

Open

80486DX2

2 & 3

4 & 5

2 & 3

1 & 2

Open

Open

SL80486DX2

2 & 3

4 & 5

2 & 3

1 & 2

Open

Open

AM486DX4 (3.45v)

Open

Open

2 & 3

1 & 2

Open

Open

(SL)AM486DX4 (3.45v)

2 & 3

4 & 5

1 & 2

1 & 2

Open

Open

80486DX4

2 & 3

4 & 5

2 & 3

1 & 2

Open

Open

P24D

2 & 3

4 & 5

1 & 2

1 & 2

Open

1 & 2

P24T

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)

Type

JP30

JP31

JP34

JP35

JP36

JP38

CX486S

Open

Open

1 & 2

Closed

Open

Open

UMC U5

Open

Open

2 & 3

Closed

Open

Open

80486SX

Open

Open

1 & 2

Closed

Open

Open

SL80486SX

Open

Open

1 & 2

Closed

Open

Open

CX486DX

Open

Open

1 & 2

Closed

Open

Open

80486DX

Open

Open

1 & 2

Closed

Open

Open

SL80486DX

Open

Open

1 & 2

Closed

Open

Open

CX486DX2

Open

Open

1 & 2

Closed

Open

Open

CX486DX2 (3.6v)

Open

Open

1 & 2

Open

Open

1 & 2

CX486DX2 (4v)

Open

Open

1 & 2

Open

Open

2 & 3

AM486DX2 (3.45v)

2 & 3

Open

Open

Open

2 & 3

Open

(SL)AM486DX2 (3.45v)

1 & 2

1 & 2

1 & 2

Open

2 & 3

Open

80486DX2

Open

Open

1 & 2

Closed

Open

Open

SL80486DX2

Open

Open

1 & 2

Closed

Open

Open

AM486DX4 (3.45v)

Open

Open

Open

Open

2 & 3

Open

(SL)AM486DX4 (3.45v)

1 & 2

1 & 2

1 & 2

Open

2 & 3

Open

80486DX4

Open

Open

1 & 2

Open

1 & 2

Open

P24D

1 & 2

1 & 2

1 & 2

Closed

Open

Open

P24T

Open

Open

1 & 2

Closed

Open

Open

Note: Pins designated should be in the closed position.

VL BUS WAIT STATE SELECTION

Setting

JP28

 

0

Pins 1 & 2 closed

»

1

Pins 2 & 3 closed

VL BUS SPEED SELECTION

Speed

JP29

 

<= 33MHz

Pins 1 & 2 closed

»

>33 MHz

Pins 2 & 3 closed

FLASH BIOS SELECTION

Setting

JP37

»

EPROM

Open

 

5v flash

Pins 2 & 3 closed

 

12v flash

Pins 1 & 2 closed