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ADVANTAGE! PRO 486

AST RESEARCH, INC.

ADVANTAGE! PRO 486

(202643-110, 202688-103)

Processor

80486SX/SL80486DX/SL80486DX2/80486DX4/Pentium Overdrive

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

64MB

Cache

64/256KB

BIOS

Unidentified

Dimensions

355mm x 305mm

I/O Options

32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

CN1

IDE interface

J22

Parallel port

CN2

Floppy drive interface

J24

Serial port

CN3

Speaker

J27

Serial port

CN4

Chassis fan power

J28

PS/2 mouse port

CN5

Front panel connector

J29

VGA feature connector

J19

32-bit VESA local bus slot

SL1

Note: The location of J27 is unidentified.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Parallel port IRQ select IRQ7

E2

pins 1 & 2 closed

 

Parallel port IRQ select IRQ5

E2

pins 2 & 3 closed

»

On board video enabled

E7

Closed

 

On board video disabled

E7

Open

»

Monitor type select color

E8

Closed

 

Monitor type select monochrome

E8

Open

»

Factory configured - do not alter

E9

Closed

»

Password enabled

E10

Closed

 

Password disabled

E10

Open

»

Factory configured - do not alter

E11

Open

»

Factory configured - do not alter

E16

Open

Note: The locations of E11 & E16 are unidentified.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 32

NONE

NONE

NONE

2MB

(1) 256K x 32

(1) 256K x 32

NONE

NONE

3MB

(1) 256K x 32

(1) 256K x 32

(1) 256K x 32

NONE

4MB

(1) 1M x 32

NONE

NONE

NONE

4MB

(1) 256K x 32

(1) 256K x 32

(1) 256K x 32

(1) 256K x 32

5MB

(1) 1M x 32

(1) 256K x 32

NONE

NONE

6MB

(1) 1M x 32

(1) 256K x 32

(1) 256K x 32

NONE

7MB

(1) 1M x 32

(1) 256K x 32

(1) 256K x 32

(1) 256K x 32

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

13MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

(1) 256K x 32

16MB

(1) 4M x 32

NONE

NONE

NONE

16MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

17MB

(1) 4M x 32

(1) 256K x 32

NONE

NONE

18MB

(1) 4M x 32

(1) 256K x 32

(1) 256K x 32

NONE

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

19MB

(1) 4M x 32

(1) 256K x 32

(1) 256K x 32

(1) 256K x 32

20MB

(1) 4M x 32

(1) 1M x 32

NONE

NONE

21MB

(1) 4M x 32

(1) 1M x 32

(1) 256K x 32

NONE

22MB

(1) 4M x 32

(1) 1M x 32

(1) 256K x 32

(1) 256K x 32

24MB

(1) 4M x 32

(1) 1M x 32

(1) 1M x 32

NONE

25MB

(1) 4M x 32

(1) 1M x 32

(1) 1M x 32

(1) 256K x 32

28MB

(1) 4M x 32

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

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

37MB

(1) 4M x 32

(1) 4M x 32

(1) 1M x 32

(1) 256K x 32

40MB

(1) 4M x 32

(1) 4M x 32

(1) 1M x 32

(1) 1M x 32

48MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

NONE

49MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

(1) 256K x 32

52MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

(1) 1M x 32

64MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

CACHE CONFIGURATION

Size

Bank 0

TAG

64KB

(8) 8K x 8

(1) 8K x 9

256KB

(8) 32K x 8

(1) 32K x 9

CACHE JUMPER CONFIGURATION

Size

E12

E14

None

Open

Open

64KB

Open

Open

256KB

Closed

Closed

CACHE CONFIGURATION

Type

E1

E6

E20

Write through

pins 1 & 2 closed

pins 1 & 2 closed

Open

Write back

pins 2 & 3 closed

pins 2 & 3 closed

Closed

Note: Jumper E20 may not be present on all boards.

CPU TYPE CONFIGURATION

Type

E3

E4

E5

E13

80486SX(PQFP)

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

Open

80486SX(PGA)

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Closed

SL-series CPU’s

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

Closed

P24T

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

Closed

CPU TYPE CONFIGURATION (1995 MANUFACTURE DATE ONLY)

Type

E17

E18

E19

Cyrix

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

Intel

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Note: If above jumpers are not present, the mainboard will only support the CPU supplied by the factory.

CPU SPEED CONFIGURATION

Speed

E15

25MHz

Closed

33MHz

Open

50iMHz

Closed

66iMHz

Open

75iMHz

Closed

100iMHz

Open

VIDEO MEMORY CONFIGURATION (1994 MANUFACTURE DATE)

Size

Bank 0

Bank 1

512KB

(4) 256K x 4

NONE

1MB

(4) 256K x 4

(4) 256K x 4

VIDEO MEMORY CONFIGURATION (1995 MANUFACTURE DATE)

Size

Bank 0

Bank 1

512KB

(1) 256K x 16

NONE

1MB

(1) 256K x 16

(1) 256K x 16

MISCELLANEOUS TECHNICAL NOTE

Board shown is 1994 manufacture date. 1994 boards only accept Intel processors. 1995 boards support Intel or Cyrix processors.