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LPX54 (REV. 3A)

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