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UM 386SX

UNIDENTIFIED

UM 386SX

Processor

80386SX

Processor Speed

16/20/24MHz

Chip Set

UMC

Max. Onboard DRAM

5MB

Cache

None

BIOS

AMI

Dimensions

221mm x 216mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

Turbo switch

J5

Power LED & keylock

J2

External battery

J6

Reset switch

J3

Auxiliary keyboard

JP2

Turbo LED

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP3

Closed

 

Monitor type select monochrome

JP3

Open

DRAM CONFIGURATION

Size

Bank 0

Parity (P-0)

Bank 1

Parity (P-1)

Bank 2

Bank 3

512KB

(4) 44256

(2) 41256

NONE

NONE

NONE

NONE

512KB

NONE

NONE

NONE

NONE

(2) 256K x 9

NONE

1MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

NONE

NONE

1MB

NONE

NONE

NONE

NONE

(2) 256K x 9

(2) 256K x 9

2MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

(2) 256K x 9

(2) 256K x 9

2MB

NONE

NONE

NONE

NONE

(2) 1M x 9

NONE

3MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

(2) 1M x 9

NONE

4MB

NONE

NONE

NONE

NONE

(2) 1M x 9

(2) 1M x 9

5MB

(4) 44256

(2) 41256

(4) 44256

(2) 41256

(2) 1M x 9

(2) 1M x 9

DRAM JUMPER CONFIGURATION

Size

JP1

512KB

pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18, 19&20, 21&22, 23&24

512KB

pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19, 18&20, 21&23, 22&24

1MB

pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18, 19&20, 21&22, 23&24

1MB

pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19, 18&20, 21&23, 22&24

2MB

pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18, 19&20, 21&22, 23&24

2MB

pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19, 18&20, 21&23, 22&24

3MB

pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18, 19&20, 21&22, 23&24

4MB

pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19, 18&20, 21&23, 22&24

5MB

pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18, 19&20, 21&22, 23&24

Note:Pins designated should be in the closed position.

DRAM PARITY CONFIGURATION

Setting

JP4

JP5

Enabled

Closed

Closed

Disabled

Open

Open