AMERICAN MEGATRENDS, INC. ATLAS PCI PENTIUM ISA Processor Pentium Processor Speed 90/100MHz Chip Set American Megatrends Max. Onboard DRAM 128MB Cache 256/512KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit PCI bus slots (4), floppy drive interface, IDE interface (2), green PC feature, parallel port, PS/2 mouse port, serial ports (2), green PC monitor connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Green PC power J1 Power LED & keylock J15 connector Serial port 1 J4 Speaker J17 Serial port 2 J5 Reset switch J18 Parallel port J7 Turbo switch J20 Floppy drive interface J8 Turbo LED J24 IDE interface J10 Green PC monitor J25 (secondary) connector IDE interface J11 IDE interface IDE J28 (primary) PS/2 mouse port J13 32-bit PCI bus slots SL1 - SL4 USER CONFIGURABLE SETTINGS Function Jumper Position » Cache memory type select write J29 Open back Cache memory type select write J29 Closed through » Parallel port IRQ select IRQ7 J37 pins 1 & 2 closed Parallel port IRQ select IRQ5 J37 pins 2 & 3 closed » Serial port 2 IRQ select IRQ3 J38 pins 1 & 2 closed Serial port 2 IRQ select IRQ4 J38 pins 2 & 3 closed » Serial port 1 IRQ select IRQ4 J39 pins 1 & 2 closed Serial port 1 IRQ select IRQ3 J39 pins 2 & 3 closed » Onboard mouse IRQ12 enabled J40 pins 1 & 2 closed Bus mouse IRQ12 enabled J40 pins 2 & 3 closed » Factory configured - do not J47 Open alter » CMOS memory normal operation J48 Open CMOS memory clear J48 Closed » Factory configured - do not J51 Open alter DRAM CONFIGURATION Size Bank 0 Bank 1 2MB (2) 256K x 36 NONE 4MB (2) 256K x 36 (2) 256K x 36 4MB (2) 512K x 36 NONE 8MB (2) 512K x 36 (2) 512K x 36 8MB (2) 1M x 36 NONE 16MB (2) 1M x 36 (2) 1M x 36 16MB (2) 2M x 36 NONE 20MB (2) 512K x 36 (2) 2M x 36 32MB (2) 2M x 36 (2) 2M x 36 32MB (2) 4M x 36 NONE 36MB (2) 512K x 36 (2) 4M x 36 40MB (2) 1M x 36 (2) 4M x 36 48MB (2) 2M x 36 (2) 4M x 36 64MB (2) 4M x 36 (2) 4M x 36 64MB (2) 8M x 36 NONE 80MB (2) 2M x 36 (2) 8M x 36 128MB (2) 8M x 36 (2) 8M x 36 128MB (2) 16M x 36 NONE CACHE CONFIGURATION Size Bank 0 256KB (8) 32K x 8 512KB (8) 64K x 8 CACHE JUMPER CONFIGURATION Size J21 J22 J23 256KB pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed 512KB pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed CPU OUTPUT SIGNAL BUFFER CONFIGURATION Output signal buffer J30 J32 Normal system Open Open Loaded system Closed Open Extra loaded system Closed Closed CPU SPEED CONFIGURATION Speed JP33 60/66/90i/100iMHz Closed 50/100iMHz Open 3.3 VOLT POWER SOURCE CONFIGURATION (INTERNAL) J3 J34 P3 & P4 Open pins 1 & 2, 3 & 4, 5 & Open 6 closed 3.3 VOLT POWER SOURCE CONFIGURATION (EXTERNAL) J3 J34 P3 & P4 pins 1 & 2, 3 & 4, 5 & Open Closed 6 closed PARALLEL PORT DMA CONFIGURATION DMA channel J43 J44 None Open Open DRQ0 pins 1 & 2 closed pins 1 & 2 closed DRQ1 pins 3 & 4 closed pins 3 & 4 closed DRQ3 pins 5 & 6 closed pins 5 & 6 closed