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





GA-486VF

GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486VF

Processor

80486SX/80487SX/80486DX/80486DX2/80486DX4/Pentium Overdrive

Processor Speed

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

Chip Set

SiS

Max. Onboard DRAM

128MB

Cache

64/128/256/512KB

BIOS

AWARD

Dimensions

230mm x 218mm

I/O Options

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

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Power LED & keylock

J7

Turbo switch

J3

External power

JP33

Turbo LED

J4

LED connector

JP34

Speaker

J5

32-bit VESA Local bus slots

SL1-SL3

Reset switch

J6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

 

Turbo mode enabled

J3

pins 2 & 3 closed

 

Turbo mode disabled

J3

pins 1 & 2 closed

 

80486DX2, DX or OverDrive installed

JP8

pins 1 & 2 closed

 

80486SX installed

JP8

pins 2 & 3 closed

Non AMD CPU

JP11

Closed

 

AMD CPU

JP11

Open

For Cyrix CPU installed

JP18

Open

 

For normal operation

JP18

Closed

Normal CPU ADS# operation

JP20

pins 2 & 3 closed

 

Delay CPU ADS# clock operation

JP20

pins 1 & 2 closed

 

Cyrix CPU in use

*JP21

pins 1 & 2 closed

 

Other CPU in use

*JP21

pins 2 & 3 closed

DX4CPU x 2

JP24

pins 3 & 4 closed

DX4CPU x 3

JP24

Open

Cyrix CPU

JP24

pins 2 & 3 closed

 

CMOS memory normal operation

JP16

pins 1 & 2 closed

 

CMOS memory clear

JP16

pins 2 & 3 closed

 

Green PC mode disabled

JP26

Open

 

Green PC mode enabled

JP26

Closed

Monitor type select CGA

JP17

Closed

 

Monitor type select other

JP17

Open

Note: *This option applies to Revision 6 only.

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

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

65MB

(4) 256K x 9

(4) 16M x 9

68MB

(4) 1M x 9

(4) 16M x 9

80MB

(4) 4M x 9

(4) 16M x 9

128MB

(4) 16M x 9

(4) 16M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

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) 16K x 8/(1) 32K x 8

256KB

(4) 64K x 8

NONE

(1) 16K x 8/(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

64KB

Open

Open

Open

N/A

128KB

Closed

Open

Open

pins 1 & 2 closed

256KB

Closed

Closed

Open

pins 2 & 3 closed

256KB

Closed

Closed

Open

pins 1 & 2 closed

512KB

Closed

Closed

Closed

pins 1 & 2 closed

VL-BUS SPEED CONFIGURATION

CPU Type

JP29

DX-50/40 MHz

Closed

Other Speed

Open

CPU VOLTAGE SELECTION

CPU Type

JP36

JP37

5 Voltage CPU

Closed

Closed

3.3 Voltage DX4 CPU

Open

Open

CPU SPEED SELECTION

Speed

JP5

JP6

JP7

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50MHz

Closed

Open

Open

50iMHz

Open

Open

Closed

66iMHz

Closed

Closed

Closed

75iMHz

Open

Open

Closed

100iMHz

Closed

Closed

Closed

DELAY LOCAL BUS CLOCK

J2 (VESA1)

J8(VESA2)

J9(VESA3)

For normal operation

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

 

DX-33, DX-40, DX-50, DX2-66, DX4-75, DX4-100*

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

Note: *For some VL-Bus interface cards that need more address setup time in above listed speeds.