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





NORTHGATE ENERGY STAR LX400A/G REV. 3.1

NORTHGATE COMPUTER SYSTEMS, INC.

NORTHGATE ENERGY STAR LX400A/G REV. 3.1

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

25/33/40/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

32-bit VESA local bus slots (2), PS/2 mouse port, green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

J3

Flash LED

J10

Turbo switch

J4

PS/2 mouse port

J11

Speaker

J5

Green PC connector

J12

Reset switch

J6

Green PC connector (monitor)

J28

Power LED & keylock

J7

32-bit VESA local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JP1

Open

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

On board mouse enabled

JP12

pins 1 & 2 closed

 

On board mouse disabled

JP12

pins 2 & 3 closed

Factory configured - do not alter

JP13

pins 2 & 3 closed

Power good signal detect from power supply

JP14

pins 1 & 2 closed

 

Power good signal detect from board

JP14

pins 2 & 3 closed

Factory configured - do not alter

JP21

Open

Factory configured - do not alter

JP22

Open

Factory configured - do not alter

JP23

Open

Factory configured - do not alter

JP100

Open

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

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

SR1

SR2

SR3

SR4

SR5

64KB

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP6

JP7

JP8

80486SX

Open

Open

pins 2 & 3 closed

80487SX

Closed

pins 2 & 3 closed

pins 1 & 2 closed

80486DX

Closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX2

Closed

pins 1 & 2 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP10

JP11

25MHz

pins 2 & 3 closed

pins 2 & 3 closed

33MHz

pins 2 & 3 closed

pins 1 & 2 closed

40MHz

pins 1 & 2 closed

pins 2 & 3 closed

50iMHz

pins 2 & 3 closed

pins 2 & 3 closed

50MHz

pins 1 & 2 closed

pins 1 & 2 closed

66iMHz

pins 2 & 3 closed

pins 1 & 2 closed

VESA WAIT STATE CONFIGURATION

Wait states

JP24

JP26

0 wait states

pins 1 & 2 closed

pins 1 & 2 closed

1 wait state

pins 2 & 3 closed

pins 2 & 3 closed

BUS SPEED CONFIGURATION

CPU speed

JP25

JP27

<= 33MHz

pins 1 & 2 closed

pins 1 & 2 closed

> 33MHz

pins 2 & 3 closed

pins 2 & 3 closed