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





ADVANTAGE! PLUS SYSTEM BOARD

AST RESEARCH, INC.

ADVANTAGE! PLUS SYSTEM BOARD

(202529-001,2,3,4)

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

VLSI

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AST

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, serial ports (2)

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port

J1

Turbo LED

JP3

Serial port 2

J2

Reset switch

JP4

Serial port 1

J3

Speaker

JP5

Floppy drive interface

J4

Hard drive LED

JP6

IDE interface

J5

External battery

JP22

Power LED & keylock

JP2

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP1

Closed

 

Monitor type select monochrome

JP1

Open

I/O bus speed select ATCLK disabled

JP18

Open

 

I/O bus speed select ATCLK enabled

JP18

Closed

IRQ7 select enabled

JP19

pins 2 & 3 closed

 

IRQ5 select enabled

JP19

pins 1 & 2 closed

I/O port enabled

JP20

pins 1 & 2 closed

 

I/O port disabled

JP20

pins 2 & 3 closed

CMOS memory normal operation (Internal Battery)

JP21

pins 2 & 3 closed

 

CMOS memory normal operation (External Battery)

JP21

Open

 

CMOS memory clear

JP21

pins 1 & 2 closed

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) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG/U19

TAG/U20

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

256KB

(4) 32 x 8

(4) 32 x 8

(1) 32 x 8

(1) 64 x 1

CACHE CONFIGURATION

Size

JP7

JP11

JP12

JP13

64KB

Open

Open

Open

Open

256KB

Closed

Closed

Open

Closed

CPU TYPE CONFIGURATION

Type

JP8

JP9

JP10

80486SX

Open

pins 2 & 3 closed

Open

80487SX

pins 2 & 3 closed

pins 1 & 2 closed

Closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

Closed

CPU SPEED CONFIGURATION

Speed

JP14

JP15

JP16

JP17

25MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

50I MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

66I MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed