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 [Image] 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 J8 Pins 1 & 2 connector 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, Open 1 & 2, 3 & 4, 5 5 & 6 & 6 Power supply 1 & 2, 3 & 4, 1 & 2, 3 & 4, Open 5 & 6 5 & 6 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