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ATLAS PCI LPX

AMERICAN MEGATRENDS, INC.

ATLAS PCI LPX

Processor

Pentium

Processor Speed

75/90/100/120/133/150MHz

Chip Set

Unidentified

Video Chip Set

ATI

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

2MB

Cache

256/512KB

BIOS

AMI

Dimensions

330mm x 228mm

I/O Options

Floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot, cache slot, MIDI/joystick interface

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Floppy drive interface

J1

Turbo LED

J32

IDE interface 1

J2

Chassis fan power

J34

MIDI/joystick interface

J3

IDE interface LED

J36

IDE interface 2

J4

Parallel port

J37

PS/2 mouse port

J9

VGA port

J41

Serial port 1

J14

VGA feature connector

J42

Serial port 2

J19

Green PC connector

J44

Power LED & keylock

J26

Cache slot

SL1

Reset switch

J28

Riser slot

SL2

Speaker

J31

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Serial port 2 used as serial port

J8

Pins 2 & 3 closed

 

Serial port 2 used as IR connector

J8

Pins 1 & 2 closed

Serial port 2 IRQ select IRQ3

J11

Pins 1 & 2 closed

 

Serial port 2 IRQ select IRQ4

J11

Pins 2 & 3 closed

Serial port 1 IRQ select IRQ4

J12

Pins 1 & 2 closed

 

Serial port 1 IRQ select IRQ3

J12

Pins 2 & 3 closed

Parallel port IRQ select IRQ7

J13

Pins 1 & 2 closed

 

Parallel port IRQ select IRQ5

J13

Pins 2 & 3 closed

PS/2 mouse enabled

J20

Pins 1 & 2 closed

 

PS/2 mouse disabled

J20

Pins 2 & 3 closed

 

Jumper information unavailable

J23

N/A

 

Jumper information unavailable

J24

N/A

 

Jumper information unavailable

J25

N/A

 

On board video enabled

J27

Pins 1 & 2 closed

 

On board video disabled

J27

Pins 2 & 3 closed

CMOS memory normal operation

J29

Open

 

CMOS memory clear

J29

Closed

 

Jumper information unavailable

J30

N/A

 

On board video IRQ enabled

J33

Closed

 

On board video IRQ disabled

J33

Open

 

Jumper information unavailable

J34

N/A

 

Jumper information unavailable

J35

N/A

 

Jumper information unavailable

J45

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

2MB

(2) 256K x 36

None

4MB

(2) 256K x 36

(2) 256K x 36

8MB

(2) 1M x 36

None

10MB

(2) 1M x 36

(2) 256K x 36

10MB

(2) 256K x 36

(2) 1M x 36

16MB

(2) 2M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

18MB

(2) 2M x 36

(2) 256K x 36

18MB

(2) 256K x 36

(2) 2M x 36

24MB

(2) 2M x 36

(2) 1M x 36

24MB

(2) 1M x 36

(2) 2M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

34MB

(2) 4M x 36

(2) 256K x 36

34MB

(2) 256K x 36

(2) 4M x 36

40MB

(2) 4M x 36

(2) 1M x 36

40MB

(2) 1M x 36

(2) 4M x 36

48MB

(2) 4M x 36

(2) 2M x 36

48MB

(2) 2M x 36

(2) 4M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

66MB

(2) 8M x 36

(2) 256K x 36

66MB

(2) 256K x 36

(2) 8M x 36

72MB

(2) 8M x 36

(2) 1M x 36

72MB

(2) 1M x 36

(2) 8M x 36

80MB

(2) 8M x 36

(2) 2M x 36

80MB

(2) 2M x 36

(2) 8M x 36

96MB

(2) 8M x 36

(2) 4M x 36

96MB

(2) 4M x 36

(2) 8M x 36

128MB

(2) 8M x 36

(2) 8M x 36

128MB

(2) 16M x 36

None

Note: Board accepts EDO memory. Board also accepts x 32 SIMMs.

CACHE CONFIGURATION

Size

SL1

256KB

Installed

512KB

Installed

Note: Cache modules can be asynchronous, pipeline burst or synchronous burst. Only one module can be installed at SL1.

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

1MB

1MB

None

2MB

1MB

1MB

Note: Bank 0 is factory installed and is not configurable. The size of the Bank 1 chips are unidentified.

CPU SPEED SELECTION

CPU speed

Clock speed

J46

J48

75MHz

50MHz

Open

Open

90MHz

60MHz

Open

Open

100MHz

50MHz

Closed

Open

100MHz

66MHz

Open

Open

120MHz

60MHz

Closed

Open

133MHz

66MHz

Closed

Open

150MHz

50MHz

Open

Closed

150MHz

60MHz

Closed

Closed

HOST CLOCK SELECTION

Speed

J21

J22

50MHz

Closed

Closed

60MHz

Closed

Open

66MHz

Open

Closed

CPU VOLTAGE SELECTION

Voltage

J38

3.135v - 3.45v (standard CPU)

Pins 1 & 2 closed

3.45v - 3.6v (VRE CPU)

Pins 2 & 3 closed

3.3V POWER SUPPLY SELECTION

Setting

J39

J40

J47

Voltage regulator

1 & 2, 3 & 4, 5 & 6

Open

1 & 2, 3 & 4, 5 & 6

Power supply

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

Open

Note: Pins designated should be in the closed position.

PCI HOST CLOCK SELECTION

Speed

J43

50MHz

Pins 2 & 3 closed

60MHz

Pins 1 & 2 closed

66MHz

Pins 1 & 2 closed