NORTHGATE COMPUTER SYSTEMS, INC. NORTHGATE ENERGY STAR LX400A/G REV. 3.1 Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set SIS Max. Onboard 32MB DRAM Cache 64/128/256KB BIOS AMI Dimensions 254mm x 220mm I/O Options 32-bit VESA local bus slots (2), PS/2 mouse port, green PC connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Turbo LED J3 Flash LED J10 Turbo switch J4 PS/2 mouse port J11 Speaker J5 Green PC connector J12 Reset switch J6 Green PC connector J28 (monitor) Power LED & keylock J7 32-bit VESA local bus SL1 & SL2 slots USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP1 Open alter » Monitor type select color JP2 Closed Monitor type select monochrome JP2 Open » On board mouse enabled JP12 pins 1 & 2 closed On board mouse disabled JP12 pins 2 & 3 closed » Factory configured - do not JP13 pins 2 & 3 alter closed » Power good signal detect from JP14 pins 1 & 2 power supply closed Power good signal detect from JP14 pins 2 & 3 board closed » Factory configured - do not JP21 Open alter » Factory configured - do not JP22 Open alter » Factory configured - do not JP23 Open alter » Factory configured - do not JP100 Open alter 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 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size SR1 SR2 SR3 SR4 SR5 64KB 2 & 3 2 & 3 1 & 2 1 & 2 1 & 2 128KB 1 & 2 1 & 2 2 & 3 2 & 3 1 & 2 256KB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP6 JP7 JP8 80486SX Open Open pins 2 & 3 closed 80487SX Closed pins 2 & 3 pins 1 & 2 closed closed 80486DX Closed pins 1 & 2 pins 1 & 2 closed closed 80486DX2 Closed pins 1 & 2 pins 1 & 2 closed closed CPU SPEED CONFIGURATION Speed JP10 JP11 25MHz pins 2 & 3 closed pins 2 & 3 closed 33MHz pins 2 & 3 closed pins 1 & 2 closed 40MHz pins 1 & 2 closed pins 2 & 3 closed 50iMHz pins 2 & 3 closed pins 2 & 3 closed 50MHz pins 1 & 2 closed pins 1 & 2 closed 66iMHz pins 2 & 3 closed pins 1 & 2 closed VESA WAIT STATE CONFIGURATION Wait states JP24 JP26 0 wait states pins 1 & 2 closed pins 1 & 2 closed 1 wait state pins 2 & 3 closed pins 2 & 3 closed BUS SPEED CONFIGURATION CPU speed JP25 JP27 <= 33MHz pins 1 & 2 closed pins 1 & 2 closed > 33MHz pins 2 & 3 closed pins 2 & 3 closed