Processor

80486DX

Processor Speed

25MHz

Chip Set

Intel

Max. Onboard DRAM

16MB (on system memory card)

Cache

None

BIOS

NEC (flash EEPROM)

Dimensions

330mm x 218mm

I/O Options

Proprietary serial/parallel card, keyboard/Bus mouse interface, floppy drive interface, proprietary system memory bus

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Proprietary system memory bus

J8

Floppy drive interface

P7

Speaker

P1

Power supply

P8

Keyboard/Bus mouse interface

P2

Drive power supply

P9

External battery

P3

Proprietary serial/parallel card

P10

Power LED & Turbo LED

P6

Auxiliary drive power supply

P12

Note: Either a proprietary system memory card or a proprietary memory bus expansion card may be installed at J8. The proprietary memory bus expansion card has four slots that may be populated by up to four 2MB expansion cards.

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

»

RDY signal from DODA select DMY RDY

11B2

pins 1 & 2 closed

RDY signal from DODA select BRDY

11B2

pins 2 & 3 closed

»

Factory configured - do not alter

18F1

Open

»

EISA memory write speed select 0 wait states

18F2

Closed

EISA memory write speed select 1 wait state

18F2

Open

»

CPU self-test enabled

21D1 & 4D1

pins 1 & 2 closed

CPU self-test enabled

21D1 & 4D1

pins 2 & 3 closed

»

Floppy interface transfer rate 500/300/250/150/125KB

2D1

pins 1 & 2 closed

Floppy interface transfer rate 500/300/250/150KB

2D1

pins 2 & 3 closed

»

Reset enabled

2J1

Open

Reset disabled

2J1

Closed

»

Test mode disabled

2N2

Open

Test mode enabled

2N2

Closed

»

Password enabled

5J2

pins 1 & 2 closed

Password disabled

5J2

pins 2 & 3 closed

»

A20 gate output select keyboard controller

5J3

pins 1 & 2 closed

A20 gate output select PAL (Novell workaround)

5J3

pins 2 & 3 closed

»

Keyboard controller W/R select PAL (Novell workaround)

5K3

pins 1 & 2 closed

Keyboard controller W/R select normal XIOWT

5K3

pins 2 & 3 closed

»

Keyboard controller input select 12HMz

5K4

pins 1 & 2 closed

Keyboard controller input select 8.33HMz

5K4

pins 2 & 3 closed

»

STBY signal for RTC select PWREN -0

6K3

pins 1 & 2 closed

STBY signal for RTC select PWREN +0

6K3

pins 2 & 3 closed

»

ROM test mode (looping) disabled

8M2

Open

ROM test mode (looping) enabled

8M2

Closed

»

Factory configured - do not alter

9E1

pins 2 & 3 closed

»

Factory configured - do not alter

9E2

pins 2 & 3 closed

»

Monitor type select color

SW1/1

On

Monitor type select monochrome

SW1/1

Off

»

Floppy drive interface address select primary (drive A)

SW1/2

Off

Floppy drive interface address select secondary (drive B)

SW1/2

On

»

Floppy drive interface enabled

SW1/3

On

Floppy drive interface disabled

SW1/3

Off

USER CONFIGURABLE SETTINGS (CON'T)

Function

Switch

Position

»

Serial port (COM2) enabled

SW1/4

On

Serial port (COM2) disabled

SW1/4

Off

»

Serial port (COM1) enabled

SW1/5

On

Serial port (COM1) disabled

SW1/5

Off

»

Parallel port enabled

SW1/6

On

Parallel port disabled

SW1/6

Off

»

NPU enabled

SW1/7

On

NPU disabled

SW1/7

Off

»

Bus mouse enabled

SW1/8

On

Bus mouse disabled

SW1/8

Off

»

Base memory size select 640KB

SW1/9

On

Base memory size select 512KB

SW1/9

Off

»

Factory configured - do not alter

SW1/10

Off

Notes: Serial parallel ports are located on the proprietary serial/parallel card.

MEMORY READ SPEED CONFIGURATION

Wait states

18F3

19F1

0

Closed

Closed

1

Open

Closed

2

Closed

Open

3

Open

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

Bank 4

Bank 5

Bank 6

Bank 7

2MB

2MB

NONE

NONE

NONE

NONE

NONE

NONE

NONE

4MB

2MB

2MB

NONE

NONE

NONE

NONE

NONE

NONE

6MB

2MB

2MB

2MB

NONE

NONE

NONE

NONE

NONE

8MB

2MB

2MB

2MB

2MB

NONE

NONE

NONE

NONE

10MB

2MB

2MB

2MB

2MB

2MB

NONE

NONE

NONE

12MB

2MB

2MB

2MB

2MB

2MB

2MB

NONE

NONE

14MB

2MB

2MB

2MB

2MB

2MB

2MB

2MB

NONE

16MB

2MB

2MB

2MB

2MB

2MB

2MB

2MB

2MB

Note: Location of Bank 0 is unidentified. Banks are filled with proprietary 2MB memory modules (NEC part # 13-260131-502-A). Either a proprietary system memory card or a proprietary memory bus expansion card may be installed at J8. The proprietary memory bus expansion card has four slots that may be populated by up to four 2MB expansion cards.