MICRONICS COMPUTERS, INC.

LPX54 (REV. 3A)

Processor

Pentium

Processor Speed

75/90/100MHz

Chip Set

VLSI

Max. Onboard DRAM

128MB

Cache

256/512KB

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

PS/2 mouse port, parallel port, serial ports (2), VGA port, VGA feature connector, floppy drive interface, IDE interfaces (2), riser slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

J6

Riser slot

SL1

Floppy drive interface

J10

Turbo switch

W12

Serial port 1

J11

Turbo LED

W13

Serial port 2

J12

Reset switch

W15

Parallel port

J13

Speaker

W16

IDE interface 2

J14

Auxiliary keyboard connector

W18

IDE interface 1

J15

Power LED & keylock

W19

VGA feature connector

J17

IDE interface LED

W27

VGA port

J18

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Cache type select write back

W1

Open

 

Cache type select write through

W1

Closed

»

Flash BIOS normal mode

W9

pins 2 & 3 closed

 

Flash BIOS recovery mode

W9

pins 1 & 2 closed

»

Flash BIOS write protect disabled

W10

Closed

 

Flash BIOS write protect enabled

W10

Open

»

CMOS memory normal operation

W17

pins 1 & 2 closed

 

CMOS memory clear

W17

pins 2 & 3 closed

»

Monitor type select color

W20

Closed

 

Monitor type select monochrome

W20

Open

»

PS/2 mouse installed

W21

Closed

 

PS/2 mouse not installed

W21

Open

»

Factory configured - do not alter

W32

pins 1 & 2 closed

»

Factory configured - do not alter

W33

pins 1 & 2 closed

»

Factory configured - do not alter

W34

pins 1 & 2 closed

»

Factory configured - do not alter

W35

pins 1 & 2 closed

»

Factory configured - do not alter

W36

pins 1 & 2 closed

»

Factory configured - do not alter

W37

pins 2 & 3 closed

»

Factory configured - do not alter

W39

pins 2 & 3 closed

»

On board VGA enabled

W40

Open

 

On board VGA disabled

W40

Closed

»

Factory configured - do not alter

W41

Closed

»

VGA hardware enabled

W42

Open

 

VGA hardware disabled

W42

Closed

»

Factory configured - do not alter

W43

Open

»

Factory configured - do not alter

W44

Open

»

Factory configured - do not alter

W45

Open

»

Factory configured - do not alter

W46

pins 2 & 3 closed

Note: The location of W46 is unidentified.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 36

NONE

16MB

(2) 1M x 36

(2) 1M x 36

16MB

(2) 2M x 36

NONE

24MB

(2) 2M x 36

(2) 1M x 36

32MB

(2) 4M x 36

NONE

32MB

(2) 2M x 36

(2) 2M x 36

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 4M x 36

(2) 2M x 36

64MB

(2) 8M x 36

NONE

64MB

(2) 4M x 36

(2) 4M x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

VRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(2) 256K x 16

NONE

2MB

(2) 256K x 16

(2) 256K x 16

Note: Bank 0 is factory installed and is not configurable.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

256KB

(8) 32K x 8

NONE

512KB

(8) 32K x 8

(8) 32K x 8

Note: Bank 0 is factory installed and is not configurable.

CACHE JUMPER CONFIGURATION

Size

W6

W7

W8

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

512KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

W3

W4

W5

W38

75MHz

Closed

Closed

Open

Open

90MHz

Closed

Open

Closed

Open

100MHz

Open

Closed

Open

Closed

Note: The location of W38 is unidentified.

CPU CLOCK SPEED CONFIGURATION

Speed

W2

1.5x

Open

2x

Closed

DMA CONFIGURATION

DMA

W22

W23

None

Open

Open

DMA 1

pins 1 & 2 closed

pins 1 & 2 closed

DMA 3

pins 2 & 3 closed

pins 2 & 3 closed

DMA CONFIGURATION

DMA

W25

W26

None

Open

Open

DMA 6

pins 1 & 2 closed

pins 1 & 2 closed

DMA 7

pins 2 & 3 closed

pins 2 & 3 closed

PCI CONFIGURATION

IDE 1 IRQ

IDE 2 IRQ

W24

W28

W29

»

IRQ 14

IRQ 15

pins 2 & 3 closed

Open

pins 1 & 2 closed

 

None

None

Open

Open

Open

 

None

IRQ 15

pins 2 & 3 closed

Open

Open

 

PCI INT A

None

Open

Closed

Open

 

PCI INT A

IRQ 15

pins 2 & 3 closed

Closed

Open

 

IRQ 14

None

Open

Open

pins 1 & 2 closed