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ADVANTAGE! 8000 SERIES 486 (COBRA)

AST RESEARCH, INC.

ADVANTAGE! 8000 SERIES 486 (COBRA)

(202695-1X1)

Processor

80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/Pentium Overdrive

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

64/256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through, VGA port, riser slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN2

External battery

J26

Serial port

CN3

Speaker

J27

Serial port

CN4

Chassis fan power

J28

Parallel port

CN5

Front console LED

J29

VGA port

CN6

Chassis fan power

J32

8514 video pass through connector

J19

IDE interface LED

J40

IDE interface

J22

Riser slot

SL1

Floppy drive interface

J24

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

Factory configured - do not alter

E6

pins 1 & 2 closed

»

CMOS memory normal operation

E8

Open

 

CMOS memory clear

E8

Closed

»

Video memory enabled

E800

Closed

»

Flash BIOS normal operation

SW1/1

Off

 

Flash BIOS force update at boot

SW1/1

On

»

Password enabled

SW1/2

On

 

Password disabled

SW1/2

Off

»

Monitor type select color

SW1/3

On

 

Monitor type select monochrome

SW1/3

Off

»

Setup access enabled

SW1/4

Off

 

Setup access disabled

SW1/4

On

»

On board video enabled

SW1/5

On

 

On board video disabled

SW1/5

Off

»

Factory configured - do not alter

SW1/6

On

»

Factory configured - do not alter

SW1/7

On

»

Factory configured - do not alter

SW1/8

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 32

NONE

NONE

NONE

8MB

(1) 2M x 32

NONE

NONE

NONE

8MB

(1) 1M x 32

(1) 1M x 32

NONE

NONE

9MB

(1) 1M x 32

(1) 1M x 32

(1) 256K x 32

NONE

10MB

(1) 1M x 32

(1) 1M x 32

(1) 256K x 32

(1) 256K x 32

12MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

NONE

16MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

16MB

(1) 4M x 32

NONE

NONE

NONE

17MB

(1) 2M x 32

(1) 2M x 32

(1) 256K x 32

NONE

18MB

(1) 2M x 32

(1) 2M x 32

(1) 256K x 32

(1) 256K x 32

20MB

(1) 2M x 32

(1) 2M x 32

(1) 1M x 32

NONE

24MB

(1) 2M x 32

(1) 2M x 32

(1) 1M x 32

(1) 1M x 32

24MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

NONE

32MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

32MB

(1) 8M x 32

NONE

NONE

NONE

32MB

(1) 4M x 32

(1) 4M x 32

NONE

NONE

33MB

(1) 4M x 32

(1) 4M x 32

(1) 256K x 32

NONE

34MB

(1) 4M x 32

(1) 4M x 32

(1) 256K x 32

(1) 256K x 32

36MB

(1) 4M x 32

(1) 4M x 32

(1) 1M x 32

NONE

40MB

(1) 4M x 32

(1) 4M x 32

(1) 1M x 32

(1) 1M x 32

40MB

(1) 4M x 32

(1) 4M x 32

(1) 2M x 32

NONE

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

48MB

(1) 4M x 32

(1) 4M x 32

(1) 2M x 32

(1) 2M x 32

48MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

NONE

64MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

64MB

(1) 8M x 32

(1) 8M x 32

NONE

NONE

66MB

(1) 8M x 32

(1) 8M x 32

(1) 256K x 32

(1) 256K x 32

68MB

(1) 8M x 32

(1) 8M x 32

(1) 1M x 32

NONE

72MB

(1) 8M x 32

(1) 8M x 32

(1) 1M x 32

(1) 1M x 32

72MB

(1) 8M x 32

(1) 8M x 32

(1) 2M x 32

NONE

80MB

(1) 8M x 32

(1) 8M x 32

(1) 2M x 32

(1) 2M x 32

80MB

(1) 8M x 32

(1) 8M x 32

(1) 4M x 32

NONE

96MB

(1) 8M x 32

(1) 8M x 32

(1) 4M x 32

(1) 4M x 32

96MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

NONE

128MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

CACHE CONFIGURATION

Note: The location and chips sizes of 64/256KB cache is unidentified.

CACHE JUMPER CONFIGURATION

Size

E5

64KB

Open

256KB

Closed

CPU TYPE CONFIGURATION

Type

E1

E2

E3

E10

80486SX (PQFP)

Open

pins 2 & 3 closed

pins 1 & 2 closed

Closed

ODP486SX

Open

pins 2 & 3 closed

pins 1 & 2 closed

Closed

80486DX

Open

pins 1 & 2 closed

pins 1 & 2 closed

Closed

80486DX2

Open

pins 1 & 2 closed

pins 1 & 2 closed

Closed

80486DX2 (WB)

Open

pins 1 & 2 closed

pins 2 & 3 closed

Open

80486DX4

Open

pins 1 & 2 closed

pins 1 & 2 closed

Closed

Pentium Overdrive

Open

pins 2 & 3 closed

pins 2 & 3 closed

Open

Note: E10 is not on all boards.

CPU SPEED CONFIGURATION

Speed

E7

E9

25MHz

pins 1 & 2 closed

Closed

33MHz

pins 2 & 3 closed

Open

50iMHz

pins 1 & 2 closed

Closed

66iMHz

pins 2 & 3 closed

Open

100iMHz

pins 1 & 2 closed

Closed

CPU SPEED CONFIGURATION (80486DX4 ONLY)

Voltage

E4

2x

pins 2 & 3 closed

2.5x

pins 1 & 2 closed

3x

Open

CPU VOLTAGE CONFIGURATION

Voltage

E11

E12

E13

E14

E15

E16

3v Cyrix

2 & 3

2 & 3

2 & 3

2 & 3

Open

1 & 2

3v Intel

1 & 2

1 & 2

1 & 2

1 & 2

Closed

2 & 3

5v Cyrix

2 & 3

2 & 3

2 & 3

2 & 3

Open

Open

5v Intel

1 & 2

1 & 2

1 & 2

1 & 2

Closed

Open

Note: Pins designated should be in the closed position. The location of E12 is unidentified.

VIDEO MEMORY CONFIGURATION

1024KB is factory installed and is not configurable.