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  |