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EISA-486A/EISA-486E

ASUS COMPUTER INTERNATIONAL

EISA-486A/EISA-486E

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33/50MHz

Chip Set

Intel

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

CON2

Speaker

CON5

Turbo switch

CON3

Power LED & keylock

CON6

Turbo LED

CON4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP1

pins 1 & 2 closed

 

Monitor type select color

JP1

pins 2 & 3 closed

Factory configured - do not alter

JP2

N/A

Power good signal detect from power supply (EISA-486E)

JP3

pins 2 & 3 closed

 

Power good signal detect from board (EISA-486E)

JP3

pins 1 & 2 closed

Factory configured - do not alter

JP5

N/A

Factory configured - do not alter

JP5

N/A

CPU is asynchronous with oscillator installed at Y1 (EISA-486A)

JP100

pins 2 & 3 closed

 

CPU is synchronous with oscillator installed at Y1 (EISA-486A)

JP100

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(2) 16K x 4

128KB

(4) 32K x 8

NONE

(2) 64K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(2) 64K x 4

CACHE RESISTOR CONFIGURATION

Size

R1

R2

R3

64KB

Installed

Not installed

Not installed

128KB

Not installed

Installed

Not installed

256KB

Not installed

Not installed

Installed

CPU SPEED CONFIGURATION

Size

JP4

20MHz

Closed

25MHz

Closed

33MHz

Open

50MHz

Open