DATAEXPERT CORPORATION OPTI-495XLC 3/486WB CACHE Processor 80386DX/80486SX/80486DX/80486DX2/Pentium Overdrive Processor Speed 25/33/40/50(internal)/50/66(internal)/MHz Chip Set OPTi Max. Onboard DRAM64MB Cache 64/128/256KB BIOS AMI Dimensions 230mm x 218mm I/O Options 32-bit VESA local bus slots (2) NPU Options 80387DX [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J1 Turbo LED J5 Speaker J2 External battery J6 Turbo switch J3 32-bit VESA Local bus S1 slot Reset switch J4 32-bit VESA Local bus S2 slot USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation J6 pins 2 & 3 (Internal battery) closed CMOS memory clear J6 pins 3 & 4 closed » Monitor type select color JP21 Closed Monitor type select monochrome JP21 Open » Factory configured - do not JP23 N/A alter » Battery type select - NI-CD JP26 pins 2 & 3 recharge closed Battery type select - Lithum JP26 pins 1 & 2 discharge 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 17MB (4) 256K x 9 (4) 4M x 9 20MB (4) 1M x 9 (4) 4M x 9 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 64MB (4) 16M x 9 NONE 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 JP10 JP11 JP16 JP17 64KB pins 2 & 3 pins 2 & 3 Open Open closed closed 128KB pins 1 & 2 pins 1 & 2 Closed Open closed closed 256KB pins 2 & 3 pins 2 & 3 Closed Closed closed closed 80386/80486 CONFIGURATION Type JP14 JP15 JP20 JP25 JP30 80386 Open Open pins 2 & pins 1 & pins 2 & 3 2 3 80486 Closed Closed pins 1 & pins 2 & pins 1 & 2 3 2 Note:Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP2 JP18 JP19 80486SX (PGA) Open Open pins 2 & 3 closed 80486SX (PQFP) Open Closed pins 2 & 3 closed 80486DX pins 1 & 2 Closed pins 1 & 2 closed closed 80486DX2 pins 1 & 2 Closed pins 1 & 2 closed closed Pentium Overdrive pins 2 & 3 Closed pins 1 & 2 closed closed CPU SPEED CONFIGURATION Speed JP6 JP7 JP8 JP9 JP22 80386DX/33MHz Open Open Closed pins 1 Open & 2 80486SX/25MHz Open Open Open pins 1 Closed & 2 80486SX/33MHz Open Open Closed pins 1 Open & 2 80486DX/25MHz Open Open Open pins 1 Closed & 2 80486DX/40MHz Open Closed Closed pins 1 Open & 2 80486DX/50i MHz Open Open Open pins 1 Closed & 2 80486DX/50MHz Open Closed Open pins 1 Open & 2 80486DX/66i MHz Open Open Closed pins 1 Open & 2 Note:Pins designated should be in the closed position.