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SLIMLINE CACHE 386SX

NORTHGATE COMPUTER SYSTEMS, INC.

SLIMLINE CACHE 386SX

Processor

80386SX

Processor Speed

16/20MHz

Chip Set

VLSI

Max. Onboard DRAM

8MB

Cache

64KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

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

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

J1

Serial port 2

J10

Turbo LED

J3

Parallel port LPT1

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

Factory configured - do not alter

SW1/1 & 2

Open

Factory configured - do not alter

SW2/3 & 4

Open

Factory configured - do not alter

SW21 & 2

N/A

Floppy drive interface interrupt (IRQ6) enabled

SW2/pins 11 & 12

Open

 

Floppy drive interface interrupt (IRQ6) disabled

SW2/pins 11 & 12

Closed

Floppy drive interface DMARQ2 enabled

SW2/pins 13 & 14

Open

 

Floppy drive interface DMARQ2 disabled

SW2/pins 13 & 14

Closed

Floppy drive interface DACK2 enabled

SW2/pins 15 & 16

Open

 

Floppy drive interface DACK2 disabled

SW2/pins 15 & 16

Closed

Floppy drive interface enabled

SW3/pins 1 & 2

Open

 

Floppy drive interface disabled

SW3/pins 1 & 2

Closed

Factory configured - do not alter

SW3/pins 5 & 6

Open

Factory configured - do not alter

W1

Closed

Cache enabled

W2

Closed

 

Cache disabled

W2

Open

Memory (8-bit) speed select 4 wait states

W3

pins 2 & 3 closed

 

Memory (8-bit) speed select 6 wait states

W3

pins 1 & 2 closed

Memory (16-bit) speed select 1 wait states

W4

pins 2 & 3 closed

 

Memory (16-bit) speed select 2 wait states

W4

pins 1 & 2 closed

BIOS type select 27256

W5

pins 2 & 3 closed

 

BIOS type select 27512

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 (J2) mode select output only

W11

pins 2 & 3 closed

 

Parallel port (J2) mode select bi-directional

W11

pins 1 & 2 closed

Floppy drive write precomp select standard

W17

pins 2 & 3 closed

 

Floppy drive write precomp select two speed drive

W17

pins 1 & 2 closed

Floppy drive type select standard

W18

pins 1 & 2 closed

 

Floppy drive type select two speed drive

W18

pins 2 & 3 closed

IDE interface enabled

W20

Open

 

IDE interface disabled

W20

Closed

IDE interface interrupt (IRQ4) enabled

W21

Open

 

IDE interface interrupt disabled

W21

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

Socket U71

Socket U76

512KB

(2) 256K x 9

NONE

NONE

NONE

PAL B

PAL B

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

PAL B

PAL B

2MB

(2) 1M x 9

NONE

NONE

NONE

PAL A

PAL A

3MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

NONE

PAL B

PAL B

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

PAL A

PAL A

5MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

(2) 1M x 9

PAL B

PAL B

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

PAL A

PAL A

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

PAL A

PAL A

DRAM JUMPER/SWITCH CONFIGURATION

Size

SW1/5 & 6

SW1/7 & 8

SW1/9 & 10

W8

W9

512KB

Open

Open

Open

pins 1 & 2 closed

pins 2 & 3 closed

1MB

Open

Closed

Open

pins 1 & 2 closed

pins 2 & 3 closed

2MB

Closed

Open

Open

pins 1 & 2 closed

pins 1 & 2 closed

3MB

Closed

Open

Open

pins 1 & 2 closed

pins 2 & 3 closed

4MB

Open

Open

Open

pins 1 & 2 closed

pins 1 & 2 closed

5MB

Open

Closed

Open

pins 1 & 2 closed

pins 2 & 3 closed

6MB

Closed

Open

Open

pins 1 & 2 closed

pins 1 & 2 closed

8MB

Closed

Open

Open

pins 1 & 2 closed

pins 1 & 2 closed

Note:DRAM jumper configurations correlate directly to memory configurations.

CACHE CONFIGURATION

Size

Bank 0

TAG

64KB

(2) 64K x 4

(1) 8K x 8

Note:Arrangement of Cache/TAG unverified.

PARALLEL PORT CONFIGURATION

LPT#

Interrupt

Address

SW2/7 & 8

SW2/9 & 10

SW3/9 & 10

SW3/11 & 12

LPT1

IRQ7

378h

Open

Closed

Open

Open

LPT1

IRQ7

3BCh

Open

Closed

Open

Closed

LPT2

IRQ5

278h

Closed

Open

Closed

Open

Disabled

N/A

N/A

Open

Open

Closed

Closed

SERIAL PORT 1 CONFIGURATION

Setting

SW2/3 & 4

SW3/3 & 4

COM2/IRQ3

Closed

Open

Disabled

Open

Closed

SERIAL PORT 2 CONFIGURATION

Setting

SW2/5 &6

SW3/7 & 8

COM1/IRQ4

Closed

Open

Disabled

Open

Closed

ON BOARD VIDEO CONFIGURATION

Size

SW5

Enabled

pins 1 & 2, 3 & 4, 5 & 6 closed & pins 7 & 8 open

Disabled

pins 1 & 2, 3 & 4, 5 & 6 open & pins 7 & 8 closed