...because we can't all be on the bleeding edge...





SLIMLINE CACHE 25/33

NORTHGATE COMPUTER SYSTEMS, INC.

SLIMLINE CACHE 25/33

Processor

80386DX

Processor Speed

25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

16MB

Cache

64/256KB

BIOS

AMI

Dimensions

350mm x 304mm

I/O Options

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

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

J1

Serial port 2

J10

Turbo LED

J3

Parallel port

J15

Power LED & keylock

J4

Floppy drive interface

J16

Speaker

J5

IDE interface

J17

Reset switch

J6

Riser card

R1

IDE interface LED

J8

Turbo switch

W6

Serial port 1

J9

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Floppy drive interface interrupt (IRQ6) enabled

SW2/pins 11 & 12

Closed

 

Floppy drive interface interrupt (IRQ6) disabled

SW2/pins 11 & 12

Open

Floppy drive interface DMARQ2 enabled

SW2/pins 13 & 14

Closed

 

Floppy drive interface DMARQ2 disabled

SW2/pins 13 & 14

Open

Floppy drive interface DACK2 enabled

SW2/pins 15 & 16

Closed

 

Floppy drive interface DACK2 disabled

SW2/pins 15 & 16

Open

Floppy drive interface enabled

SW3/pins 1 & 2

Closed

 

Floppy drive interface disabled

SW3/pins 1 & 2

Open

Factory configured - do not alter

W1

Open

Cache enabled

W4

Closed

 

Cache disabled

W4

Open

BIOS type select 27512

W5

pins 2 & 3 closed

 

BIOS type select 27256

W5

pins 1 & 2 closed

Monitor type select monochrome

W7

pins 1 & 2 closed

 

Monitor type select color

W7

pins 2 & 3 closed

Parallel port mode select input only

W13

pins 2 & 3 closed

 

Parallel port mode select bi-directional

W13

pins 1 & 2 closed

Floppy drive precompensation select standard

W17

pins 2 & 3 closed

 

Floppy drive precompensation select alternate

W17

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

DRAM CONFIGURATION (PAL CHIP "A" INSTALLED AT U44)

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

DRAM JUMPER CONFIGURATION (PAL CHIP "A" INSTALLED AT U44)

Size

W8

W9

W10

W11

SW1

1MB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2, 5 & 6, 7 & 8, 9 & 10

2MB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2, 5 & 6, 7 & 8

4MB

1 & 2

2 & 3

1 & 2

2 & 3

7 & 8, 9 & 10

8MB

1 & 2

2 & 3

1 & 2

2 & 3

7 & 8

Note: Pins designated should be in the closed position.

DRAM CONFIGURATION (PAL CHIP "B" INSTALLED AT U44)

Size

Bank 0

Bank 1

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

DRAM JUMPER CONFIGURATION (PAL CHIP "B" INSTALLED AT U44)

Size

W8

W9

W10

W11

SW1

4MB

1 & 2

2 & 3

1 & 2

2 & 3

7 & 8, 9 & 10

8MB

1 & 2

2 & 3

1 & 2

2 & 3

7 & 8

16MB

1 & 2

1 & 2

1 & 2

1 & 2

5 & 6, 7 & 8, 9 & 10

Note: Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

64KB

(10) 8K x 8

256KB

(10) 32K x 8

CACHE CONFIGURATION

Size

W2

W3

64KB

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

IDE CONFIGURATION

Setting

W20

W21

Enabled

Open

Closed

Disabled

Closed

Open

PARALLEL PORT ADDRESS CONFIGURATION

Address

SW3

378h

Open

3BCh

pins 11 & 12 closed

278h

pins 9 & 10 closed

Disabled

pins 9 & 10, 11 & 12 closed

PARALLEL PORT IRQ CONFIGURATION

IRQ

SW2

IRQ7

pins 9 & 10 closed

IRQ5

pins 7 & 8 closed

SERIAL PORT 1 CONFIGURATION

Setting

SW2

SW3

Enabled

pins 5 & 6 closed

Open

Disabled

Open

pins 7 & 8 closed

SERIAL PORT 2 CONFIGURATION

Setting

SW2

SW3

Enabled

pins 3 & 4 closed

Open

Disabled

Open

pins 3 & 4 closed

VIDEO CONFIGURATION

Setting

SW5

Enabled

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

Disabled

pins 7 & 8 closed