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486SX-25

UNITRON COMPUTER, INC.

486SX-25

Processor

80486SX

Processor Speed

25MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

None

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J3

Turbo LED

J11

Reset switch

J9

Speaker

J12

Turbo switch

J10

Power LED & keylock

J13

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

J4

pins 2 & 3 closed

 

Monitor type select monochrome

J4

pins 1 & 2 closed

Factory configured - do not alter

J8

N/A

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) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CPU TYPE CONFIGURATION

Type

J5

J6

J7

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

Open

80487SX

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed