ATLAS PCI LPX Motherboard Settings and Configuration

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

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ATLAS PCI LPX Motherboard Settings and Configuration

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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