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486SC-H

UNIDENTIFIED

486SC-H

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/50(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

32/128KB

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

J1

Speaker

J4

Turbo switch

J2

Power LED & keylock

J5

Reset switch

J3

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CPU clock speed select 1x

J8

pins 1 & 2 closed

 

CPU clock speed select 2x

J8

pins 2 & 3 closed

Monitor type select monochrome/EGA/VGA

J9

Open

 

Monitor type select color

J9

Closed

Cache wait state select 1 wait state

J12

Open

 

Cache wait state select 0 wait states

J12

pins 3 & 4 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) 256K x 9

(4) 1M x 9

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 256K x 9

(4) 4M x 9

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

TAG

32KB

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION

Size

JS1

JS2

JS3

JS4

32KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

J7

80486SX

pins 1 & 2 closed

80487SX

pins 2 & 3 closed

80486DX

pins 2 & 3 closed

80486DX2

pins 2 & 3 closed