UNIDENTIFIED OPTI-495SX 3/486WB CACHE Processor 80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2 Processor Speed 25/33/40/50(internal)/50/66(internal)MHz Chip Set OPTI Max. Onboard DRAM32MB Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2) NPU Options 80387DX/CX487DLC [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J1 Reset switch J5 Speaker J2 External battery JP35 Turbo switch J3 32-bit VESA local bus SL1 & SL2 slots Turbo LED J4 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP2 N/A alter » Factory configured - do not JP3 N/A alter » Factory configured - do not JP4 N/A alter » Factory configured - do not JP5 N/A alter » Factory configured - do not JP6 N/A alter » Factory configured - do not JP17 N/A alter » Factory configured - do not JP18 N/A alter » Factory configured - do not JP19 N/A alter » Factory configured - do not JP20 N/A alter » Factory configured - do not JP21 N/A alter » Factory configured - do not JP22 N/A alter » Factory configured - do not JP23 N/A alter » Factory configured - do not JP24 N/A alter » Factory configured - do not JP31 N/A alter » Monitor type select monochrome JP34 Open Monitor type select color JP34 Closed » CMOS memory normal operation JP35 pins 2 & 3 closed CMOS memory clear JP35 pins 3 & 4 closed Battery type select external JP35 Closed » NPU type select 80387 PQFP JP36 Open NPU type select 80387 PGA JP36 Closed » Factory configured - do not S1 N/A alter » Factory configured - do not S2 N/A alter » Factory configured - do not S3 N/A 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 (4) 4M x 9 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) 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 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 JP25 JP26 JP27 JP28 64KB pins 2 & 3 Open Open Open closed 128KB pins 1 & 2 Open Closed Closed closed 256KB pins 2 & 3 Closed Closed Closed closed CPU TYPE CONFIGURATION Type JP7 80386DX (PQFP) Open 80386DX (PGA) Closed CX486DLC Closed 80486 (PQFP) Open 80486 (PGA) Closed CPU TYPE CONFIGURATION (80486 PGA) Type JP8 JP29 JP30 80486SX Open pins 2 & 3 Open closed 80487SX pins 2 & 3 pins 1 & 2 Closed closed closed 80486DX pins 1 & 2 pins 1 & 2 Closed closed closed 80486DX2 pins 1 & 2 pins 1 & 2 Closed closed closed CPU SPEED CONFIGURATION (80386/CX486DLC) Speed JP1 JP10 JP11 JP12 JP16 JP33 25MHz Open Closed 1 & 2 2 & 3 2 & 3 1 & 2 33MHz Closed Open 1 & 2 2 & 3 2 & 3 1 & 2 40MHz Open Open 1 & 2 2 & 3 2 & 3 1 & 2 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION (80486) Speed JP1 JP10 JP11 JP12 JP16 JP33 25MHz Open Closed 2 & 3 1 & 2 1 & 2 2 & 3 33MHz Closed Open 2 & 3 1 & 2 1 & 2 2 & 3 50iMHz Open Closed 2 & 3 1 & 2 1 & 2 2 & 3 50MHz Open Closed 1 & 2 1 & 2 1 & 2 2 & 3 66iMHz Closed Open 2 & 3 1 & 2 1 & 2 2 & 3 Note: Pins designated should be in the closed position.