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3486 SYSTEM TYPE 16

UNITRON COMPUTER, INC.

3486 SYSTEM TYPE 16

Processor

80386SX/CX486SLC

Processor Speed

16/20/25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

16MB

Cache

None

BIOS

Phoenix

Dimensions

254mm x 218mm

I/O Options

Floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA port

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Game port

CN1

IDE interface

J23

VGA port

CN2

IDE interface LED

J24

Parallel port

CN3

Turbo LED

J26

Serial port 2

CN4

Turbo LED

J30

Serial port 1

CN5

Power LED & keylock

J31

Chassis fan power

J13

Floppy drive interface

J32

Reset switch

J14

Riser Card

SL1

Speaker

J21

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Hard drive installed

J1

pins 2 & 3 closed

 

Hard drive not installed

J1

pins 1 & 2 closed

»

Serial port B enabled

J3

pins 1 & 2 closed

 

Serial port B disabled

J3

pins 2 & 3 closed

»

Game port enabled

J4

pins 1 & 2 closed

 

Game port disabled

J4

pins 2 & 3 closed

»

Parallel port enabled

J7

pins 1 & 2 closed

 

Parallel port disabled

J7

pins 2 & 3 closed

»

Serial port A enabled

J8

pins 1 & 2 closed

 

Serial port A disabled

J8

pins 2 & 3 closed

»

Parallel port select LPT1

J9

pins 1 & 2 closed

 

Parallel port select LPT2

J9

pins 2 & 3 closed

»

Monitor type select color

J11

pins 1 & 2 closed

 

Monitor type select monochrome

J11

pins 2 & 3 closed

»

Display type select non interlaced

J15

Open

 

Display type select intrlaced

J15

Closed

»

NPU synchronous with CPU

J16

Open

 

NPU asynchronous with CPU

J16

Closed

»

Floppy drive interface enabled

J25

pins 1 & 2 closed

 

Floppy drive interface disabled

J25

pins 2 & 3 closed

»

IDE interface enabled

J27

pins 1 & 2 closed

 

IDE interface disabled

J27

pins 2 & 3 closed

»

Turbo LED enabled on J26 (System M)

J29

pins 1 & 2 closed

 

Floppy drive LED enabled on J26 (System B; open J30)

J29

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(2) 256K x 9

NONE

NONE

NONE

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

NONE

NONE

3MB

(2) 256K x 9

(2) 1M x 9

(2) 256K x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

5MB

(2) 256K x 9

(2) 1M x 9

(2) 256K x 9

(2) 1M x 9

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

NONE

NONE

12MB

(2) 1M x 9

(2) 4M x 9

(2) 1M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

NONE

NONE

CPU TYPE CONFIGURATION

Type

J28

80386SX

Open

80486SLC

pins 1 & 2, 3 & 4, 5 & 6 closed

CPU SPEED CONFIGURATION

Speed

J35

J38

16MHz

pins 1 & 2 closed

pins 1 & 2 closed

20MHz

pins 1 & 2 closed

pins 2 & 3 closed

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

33MHz

pins 2 & 3 closed

pins 2 & 3 closed

FLOPPY DRIVE CONFIGURATION

Type

J17

J18

J19

J20

System B

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

System M

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

Note: System B- drive B has twisted cable; drive A has straight cable. System M- drive B has straight cable; drive A has twisted cable

SERIAL PORT CONFIGURATION

Port 1

J10

COM1

pins 1 & 2 closed

COM3

pins 2 & 3 closed

SERIAL PORT CONFIGURATION

Port 2

J2

COM2

pins 1 & 2 closed

COM4

pins 2 & 3 closed

VRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

256KB

(2) 44256

NONE

NONE

NONE

512KB

(2) 44256

(2) 44256

NONE

NONE

1MB

(2) 44256

(2) 44256

(2) 44256

(2) 44256

ON BOARD VGA CONFIGURATION

Setting

J36

J37

Enabled

Closed

Closed

Disabled

Open

Open