NORTHGATE COMPUTER SYSTEMS, INC. 486ZXP Processor 80486SX/80486DX/80486DX2 Processor Speed 16/20/25/33/50(internal)/66(internal)MHz Chip Set OPTI Max. Onboard 32MB DRAM Cache 64/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options Parallel port, serial ports (2), floppy drive interface, IDE interface NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Parallel port J1 Turbo LED JP3 Serial port 1 J2 Reset switch JP4 Serial port 2 J3 Speaker JP5 Floppy drive interface J4 IDE interface LED JP6 IDE interface J5 External battery JP22 Power LED & keylock JP2 USER CONFIGURABLE SETTINGS Function Jumper Position Monitor type select color JP1 Closed Monitor type select monochrome JP1 Open » Parallel port IRQ select JP19 pins 2 & 3 LPT1/IRQ7 closed Parallel port IRQ select JP19 pins 1 & 2 LPT2/IRQ5 closed » I/O ports enabled JP20 pins 1 & 2 closed I/O ports disabled JP20 pins 2 & 3 closed » Battery type select internal JP21 pins 2 & 3 closed Battery type select external JP21 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE 5MB (4) 256K x 9 (4) 1M x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 Note:Systems being used as file servers should not use the 5MB or 20MB configurations. CACHE CONFIGURATION Size Bank 0 64KB (8) 64K x 1 256KB (8) 64K x 4 CACHE JUMPER CONFIGURATION Size JP7 JP11 JP12 JP13 64KB Open Open Open Open 256KB Closed Closed Open Closed CPU TYPE CONFIGURATION Type JP8 JP9 JP10 80486SX Open pins 2 & 3 Open closed 80486DX pins 1 & 2 pins 1 & 2 Closed closed closed 80486DX2 pins 2 & 3 pins 1 & 2 Closed closed closed CPU SPEEDCONFIGURATION Speed JP14 JP15 JP16 JP17 16MHz pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed closed 20MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed closed 25MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed closed 33MHz pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed closed 50iMHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed closed 66iMHz pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed closed