UNIDENTIFIED LX400/P VESA LOCAL BUS Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2 Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set SIS Max. Onboard DRAM 32MB SRAM Cache 64/128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit VESA card slot (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Turbo LED J3 Reset switch J6 Turbo switch J4 Power LED & keylock J7 Speaker J5 32-bit VESA card (2) S1 & S2 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter JP1 closed » Monitor type select color JP2 closed Monitor type select monochrome JP2 open » Factory configured - do not alter JP9 unknown » 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 alter JP15 unknown » Factory configured - do not alter JP16 unknown » Factory configured - do not alter JP24 unknown » Factory configured - do not alter JP25 unknown » VESA bus wait states select 0 JP26 open VESA bus wait state select 1 JP26 open » CPU speed select £ 33MHz JP27 closed CPU speed select > 33MHz JP27 closed Note: The locations of JP1 and JP16 are unknown. 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) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 CPU SPEED CONFIGURATION Speed JP10 JP11 JP12 JP13 66MHz pins 1 & 2 pins 2 & 3 pins 1 & 2 pins 1 & 2 (internal) closed closed closed closed 50MHz pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed 50MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 1 & 2 (internal) closed closed closed closed 33MHz pins 1 & 2 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed closed 25MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed closed 20MHz pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed CPU JUMPER CONFIGURATION CPU JP6 JP7 JP8 80486DX closed pins 1 & 2 pins 1 & 2 closed closed 80487SX closed pins 2 & 3 pins 1 & 2 closed closed 80486SX open open pins 2 & 3 closed SRAM JUMPER CONFIGURATION Jumper 64KB 128KB 256KB SR1 pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed SR2 pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed SR3 pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed SR4 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed SR5 pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed SR6 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed SRAM CONFIGURATION Size Cache SRAM Location TAG 64KB (8) 8K x 8 Banks 0 & 1 (1) 8K x 8 128KB (4) 32K x 8 Bank 0 (1) 8K x 8 256KB (8) 32K x 8 Banks 0 & 1 (1) 32K x 8