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LX400A/G

UNIDENTIFIED

LX400A/G

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

SiS

Max. Onboard DRAM

32MB

Cache

64/128/256

BIOS

AMI

Dimensions

230mm x 218mm

I/O Options

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

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Flash LED connector

FLASH

Power LED & keylock

J7

Turbo LED

J3

PS/2 mouse connector

J11

Turbo switch

J4

Standby output connector

J28

Speaker

J5

32-bit VESA Local bus slot

S1

Reset switch

J6

32-bit VESA Local bus slot

S2

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

Factory configured do not alter

JP10

N/A

Factory configured do not alter

JP11

N/A

 

PS/2 mouse interrupt

JP12

pins 1 & 2 closed

 

PS/2 mouse set at AT Bus IRQ12

JP12

pins 2 & 3 closed

Factory configured do not alter

JP13

N/A

Factory configured do not alter

JP14

N/A

Factory configured do not alter

JP21

N/A

Factory configured do not alter

JP22

N/A

Factory configured do not alter

JP23

N/A

Power saving mode switch off

STDBY

Open

 

Power saving mode switch on

STDBY

Closed

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) 4MB x 9

(4) 4MB x 9

20MB

(4) 1MB x9

(4) 4MB x 9

32MB

(4) 4MB x 9

(4) 4MB x 9

CACHE JUMPER CONFIGURATION

Size

SR1

SR2

SR3

SR4

SR5

64KB

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

128KB

pins 1 & 2

pins 1 & 2

pins 2 & 3

pins 2 & 3

pins 1 & 2

256KB

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

Note:Pins designated are in the closed position.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64 KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128 KB

(4) 32K x 8

NONE

(1) 8K x 8

256 KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CPU TYPE CONFIGURATION

CPU 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

CPU SPEED CONFIGURATION

CPU speed

S0

S1

S2

25 MHz

Closed

Open

Open

33 MHz

Closed

Closed

Closed

40 MHz

Closed

Closed

Closed

50 MHz

Open

Open

Closed

50iMHz

Closed

Open

Open

60iMHz

Closed

Closed

Closed

Note:The location on the system board of the above jumpers is unidentified.

VESA WAIT STATE/BUS SPEED CONFIGURATION

CPU Speed

Wait states

JP24, JP26

JP25, JP27

< 33MHz

0 wait states

pins 1 & 2 closed

pins 1 & 2 closed

> 33MHz

1 wait state

pins 2 & 3 closed

pins 2 & 3 closed

MISCELLANEOUS TECHNICAL NOTE

Note:Some of the SR jumpers may be hard-wired by the manufacturer, thus some of the cache options may not be available.