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UM 486/486SX

ELITEGROUP COMPUTER SYSTEMS, INC.

UM 486/486SX

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33/50MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

J4

Turbo LED

J2

Speaker

J5

Turbo switch

J3

Power LED & keylock

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP1

pins 2 & 3 closed

 

Monitor type select monochrome

JP1

pins 1 & 2 closed

Power good signal detect from power supply

JP2

pins 1 & 2 closed

 

Power good signal detect from board

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

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG/U34 - U37

Dirty Bit/U38

32KB

(4) 8K x 8

NONE

(4) 16K x 4

(1) 16K x 1

64KB

(4) 8K x 8

(4) 8K x 8

(4) 16K x 4

(1) 16K x 1

128KB

(4) 32K x 8

NONE

(4) 16K x 4

(1) 16K x 1

256KB

(4) 32K x 8

(4) 32K x 8

(4) 16K x 4

(1) 16K x 1

CACHE JUMPER CONFIGURATION

Size

JP10

JP11

JP12

JP14

JP15

32KB

pins 2 & 3

Open

pins 1 & 2

pins 1 & 2

pins 1 & 2

64KB

pins 1 & 2

Open

pins 1 & 2

pins 2 & 3

pins 1 & 2

128KB

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 2 & 3

pins 2 & 3

256KB

pins 1 & 2

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP5

JP6

JP8

JP16

80486SX

pins 1 & 2 closed

pins 2 & 3 closed

Open

Open

80487SX

pins 2 & 3 closed

pins 1 & 2 closed

Closed

Closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

Open