GA-486VS REV.8C

GIGA-BYTE TECHNOLOGY CO., INC.

GA-486VS REV.8C

Processor

CX486M6/AM486/80486SX/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 connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Power LED & keylock

J7

Turbo switch

J3

Green PC connector

JP33

Turbo LED

J4

Green PC LED connector

JP34

Speaker

J5

32-bit VESA local bus slots

S1 - S3

Reset switch

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CPU type select all CPU’s

JP11

Closed

CPU type select AMD CPU only

JP11

Open

»

CMOS memory normal operation

JP16

pins 1 & 2 closed

CMOS memory clear

JP16

pins 2 & 3 closed

»

Monitor type select CGA

JP17

Closed

Monitor type select all others

JP17

Open

»

CPU type select all CPU types

JP21

pins 2 & 3 closed

CPU type select Cyrix, P24D, AMD enhanced CPU only

JP21

pins 1 & 2 closed

»

Green PC normal operation

JP26

Open

Green PC green mode

JP26

Closed

»

Cache type select write through

JP30

pins 2 & 3 closed

Cache type select write back

JP30

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

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

17MB

(1) 256K x 36

(1) 4M x 36

NONE

NONE

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

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

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

32MB

(1) 2M 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

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

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

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

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

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 or (1) 32K x 8

256KB

(4) 64K x 8

NONE

(1) 16K x 8 or (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

CPU TYPE CONFIGURATION

Type

JP24

CX486M6

pins 2 & 3 closed

AM486SL

pins 2 & 5 closed

P24D

pins 2 & 5 closed

AM486DX4 2x

pins 3 & 4 closed

AM486DX4 3x

pins 3 & 4 open

80486DX4 2x

pins 3 & 4 closed

80486DX4 3x

pins 3 & 4 open

CPU TYPE CONFIGURATION

Type

JP8

JP18

CX486M6

N/A

Open

80486SX

pins 2 & 3 closed

Closed

80486DX

pins 1 & 2 closed

Closed

80486DX2

pins 1 & 2 closed

Closed

80486DX4

pins 1 & 2 closed

Closed

Pentium Overdrive

pins 1 & 2 closed

Closed

CPU SPEED CONFIGURATION

Speed

JP5

JP6

JP7

JP29

25MHz

Open

Open

Closed

Open

33MHz

Closed

Closed

Closed

Open

40MHz

Open

Closed

Closed

Closed

50iMHz

Open

Open

Closed

Open

50MHz

Closed

Open

Open

Closed

66iMHz

Closed

Closed

Closed

Open

75i (40 x 2) MHz

Open

Closed

Closed

Closed

75i (25 x 3) MHz

Open

Open

Closed

Open

100i (50 x 2) MHz

Closed

Open

Open

Closed

100i (33 x 3) MHz

Closed

Closed

Closed

Open

CPU VOLTAGE CONFIGURATION

Function

JP36

JP37

3.3 v

Open

Open

5 v

Closed

Closed

VOLTAGE DELAY CONFIGURATION

Function

J2

J8

J9

JP20

Normal card installed

1 & 2

1 & 2

1 & 2

2 & 3

Card installed needs address time

2 & 3

2 & 3

2 & 3

1 & 2

Note: Pins designated should be in closed position. Systems utilizing cards that need more address time are: DX4-100, DX4-75, DX2-66, DX-50, DX-40, DX-33.

Processor	CX486M6/AM486/80486SX/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 connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Power LED & keylock	J7
Turbo switch	J3	Green PC connector	JP33
Turbo LED	J4	Green PC LED connector	JP34
Speaker	J5	32-bit VESA local bus slots	S1 - S3
Reset switch	J6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CPU type select all CPU’s	JP11	Closed
	CPU type select AMD CPU only	JP11	Open
»	CMOS memory normal operation	JP16	pins 1 & 2 closed
	CMOS memory clear	JP16	pins 2 & 3 closed
»	Monitor type select CGA	JP17	Closed
	Monitor type select all others	JP17	Open
»	CPU type select all CPU types	JP21	pins 2 & 3 closed
	CPU type select Cyrix, P24D, AMD enhanced CPU only	JP21	pins 1 & 2 closed
»	Green PC normal operation	JP26	Open
	Green PC green mode	JP26	Closed
»	Cache type select write through	JP30	pins 2 & 3 closed
	Cache type select write back	JP30	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
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
17MB	(1) 256K x 36	(1) 4M x 36	NONE	NONE
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
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

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
32MB	(1) 2M 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
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
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
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
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
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 or (1) 32K x 8
256KB	(4) 64K x 8	NONE	(1) 16K x 8 or (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

CPU TYPE CONFIGURATION
Type	JP24
CX486M6	pins 2 & 3 closed
AM486SL	pins 2 & 5 closed
P24D	pins 2 & 5 closed
AM486DX4 2x	pins 3 & 4 closed
AM486DX4 3x	pins 3 & 4 open
80486DX4 2x	pins 3 & 4 closed
80486DX4 3x	pins 3 & 4 open

CPU TYPE CONFIGURATION
Type	JP8	JP18
CX486M6	N/A	Open
80486SX	pins 2 & 3 closed	Closed
80486DX	pins 1 & 2 closed	Closed
80486DX2	pins 1 & 2 closed	Closed
80486DX4	pins 1 & 2 closed	Closed
Pentium Overdrive	pins 1 & 2 closed	Closed

CPU SPEED CONFIGURATION
Speed	JP5	JP6	JP7	JP29
25MHz	Open	Open	Closed	Open
33MHz	Closed	Closed	Closed	Open
40MHz	Open	Closed	Closed	Closed
50iMHz	Open	Open	Closed	Open
50MHz	Closed	Open	Open	Closed
66iMHz	Closed	Closed	Closed	Open
75i (40 x 2) MHz	Open	Closed	Closed	Closed
75i (25 x 3) MHz	Open	Open	Closed	Open
100i (50 x 2) MHz	Closed	Open	Open	Closed
100i (33 x 3) MHz	Closed	Closed	Closed	Open

CPU VOLTAGE CONFIGURATION
Function	JP36	JP37
3.3 v	Open	Open
5 v	Closed	Closed

VOLTAGE DELAY CONFIGURATION
Function	J2	J8	J9	JP20
Normal card installed	1 & 2	1 & 2	1 & 2	2 & 3
Card installed needs address time	2 & 3	2 & 3	2 & 3	1 & 2
Note: Pins designated should be in closed position. Systems utilizing cards that need more address time are: DX4-100, DX4-75, DX2-66, DX-50, DX-40, DX-33.