NORTHGATE COMPUTER SYSTEMS, INC.

SLIMLINE SP

Processor

80386DX/80486DX

Processor Speed

25/33MHz

Chip Set

VLSI

Max. Onboard DRAM

64MB

Cache

64/256KB

BIOS

AMI

Dimensions

350mm x 304mm

I/O Options

Proprietary CPU/NPU module slot, parallel port, serial ports (2), floppy drive interface, IDE interface, VGA port

NPU Options

80387/3167/4167 (on external CPU/NPU card)

CONNECTIONS

Purpose

Location

Purpose

Location

Proprietary CPU module

CPU1

Serial port 1

J9

VGA port

J1

Serial port 2

J10

External battery

J2

Parallel port LPT1

J15

Turbo LED

J4

Floppy drive interface

J16

Power LED & keylock

J5

IDE interface

J17

Reset switch

J6

Speaker

J19

IDE interface LED

J8

Riser card

R1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Floppy drive write precomp select alternate

W2

pins 2 & 3 closed

 

Floppy drive write precomp select normal

W2

pins 1 & 2 closed

»

Factory configured - do not alter

W3

N/A

»

Monitor type select monochrome

W4

pins 1 & 2 closed

 

Monitor type select color

W4

pins 2 & 3 closed

»

CMOS memory normal operation

W8

Open

 

CMOS memory clear

W8

Closed

»

Parallel port mode select bi-directional

W13

pins 2 & 3 closed

 

Parallel port mode select input only

W13

pins 1 & 2 closed

»

Floppy drive mode select single speed

W18

pins 1 & 2 closed

 

Floppy drive mode select dual speed

W18

pins 2 & 3 closed

»

Factory configured - do not alter

W27

N/A

»

Factory configured - do not alter

W29

N/A

»

Factory configured - do not alter

SW1 pins 1 & 2

N/A

»

Factory configured - do not alter

SW1 pins 5 & 6

N/A

»

VGA BIOS shadowing enabled

SW1 pins 11 & 12

Closed

 

VGA BIOS shadowing disabled

SW1 pins 11 & 12

Open

»

BIOS shadowing enabled

SW1 pins 11 & 12

Closed

 

BIOS shadowing disabled

SW1 pins 11 & 12

Open

»

IRQ6 enabled

SW2 pins 9 & 10

Closed

 

IRQ6 disabled

SW2 pins 9 & 10

Open

»

Floppy drive interface enabled

SW3 pins 1 & 2

Open

 

Floppy drive interface disabled

SW3 pins 1 & 2

Closed

Note:The locations of W8 & W29 are unidentified.

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

DRAM JUMPER/SWITCH CONFIGURATION

Size

SW1

W5

W6

1MB

3 & 4, 17 & 18, 19 & 20

2 & 3

2 & 3

2MB

17 & 18, 19 & 20

2 & 3

2 & 3

4MB

3 & 4, 17 & 18

1 & 2

2 & 3

8MB

17 & 18

1 & 2

2 & 3

16MB

3 & 4

1 & 2

1 & 2

32MB

Open

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

IDE CONFIGURATION

Setting

SW21

W20

Enabled

Closed

Open

Disabled

Open

Closed

PARALLEL PORT IRQ CONFIGURATION

IRQ

SW2

IRQ5

pins 5 & 6 closed

IRQ7

pins 7 & 8 closed

PARALLEL PORT CONFIGURATION

Setting

SW3

LPT1/3BCh

pins 9 & 10 closed

LPT1/378h

Open

LPT2/278h

pins 7 & 8 closed

Disabled

pins 7 & 8, 9 & 10 closed

SERIAL PORT 1 CONFIGURATION

Setting

SW2

SW3

Enabled

pins 1 & 2 closed

Open

Disabled

Open

pins 5 & 6 closed

SERIAL PORT 2 CONFIGURATION

Setting

SW2

SW3

Enabled

pins 3 & 4 closed

Open

Disabled

Open

pins 3 & 4 closed

VIDEO CONFIGURATION

Setting

SW5

W19

Enabled

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

pins 1 & 2 closed

Disabled

Open

pins 2 & 3 closed

BIOS CONFIGURATION

Setting

SW1

F000-FFFF (VGA BIOS disabled)

pins 7 & 8, 9 & 10 closed

F000-FFFF, E000-EFFF (VGA BIOS disabled, BIOS shadowing enabled)

pins 7 & 8 closed

F000-FFFF VGA BIOS at C000-C7FF

pins 9 & 10 closed

F000-FFFF VGA BIOS at C000-C7FF, IDE interface at C800-CFFF

pins 9 & 10 closed

CACHE CONFIGURATION

Size

Bank 0

64KB

(8) 8K x 8

256KB

(8) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W1

64KB

Open

256KB

pins 1 & 2, 3 & 4 closed

USER CONFIGURABLE SETTINGS

Setting

W3

W4

W5

Burst mode enabled

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

Burst mode enabled

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

CACHE CONFIGURATION

Size

Bank 0

64KB

(8) 8K x 8

256KB

(8) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W1

W2

W5

64KB

pins 1 & 2 closed

pins 1 & 2 closed

Open

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 3 & 4, 5 & 6 closed