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ASUS COMPUTER INTERNATIONAL

ISA-486SIQ

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/50(internal)/50/66(internal)MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

220mm x 240mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Reset

CON1

Turbo LED

CON4

Speaker

CON2

Turbo switch

CON5

Power LED & keylock

CON3

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CPU speed select 25/33/50MHz

JP1

pins 2 & 3 closed

 

CPU speed select 20MHz

JP1

pins 1 & 2 closed

»

Monitor type select monochrome

JP2

pins 1 & 2 closed

 

Monitor type select color

JP2

pins 2 & 3 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

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

SRAM CONFIGURATION

Size

Cache

Location

TAG

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

256KB

(8) 32K x 8

Banks 0 & 1

(1) 32K x 8

SRAM JUMPER CONFIGURATION

Size

Jumper CJ1

Jumper CJ2

Jumper CJ3

64KB

pins 1 & 2 closed

pins 1 & 2 closed

open

128KB

pins 2 & 3 closed

open

closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

open

CPU JUMPER CONFIGURATION

CPU

Jumper CPJ1

Jumper CPJ2

Jumper CPJ3

80486DX

pins 2 & 3 closed

pins 1 & 2 and 3 & 4 closed

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

pins 1 & 2 and 3 & 4 closed

pins 1 & 2 closed

80486SX

open

pins 2 & 3 closed

pins 2 & 3 closed