DATAEXPERT CORPORATION OPTI-495SX-2VL Device Type Mainboard Processor 80386DX/CX486DLC/CX486DLC/80486SX/80486DX Processor 8/10/12/16/20/25/33/40/50(internal)/50/60/66(internal)/66/75 Speed (internal)/80(internal)/100(internal)/120(internal)/75/90MHz Chip Set OPTI Maximum 32MB Onboard Memory Cache 64/128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit VESA local bus slots (2) NPU options 80387, CX87DLC [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 Label Position » Factory configured - do not JP2 Unidentified alter » Factory configured - do not JP2 Unidentified alter » Factory configured - do not JP4 Unidentified alter » Factory configured - do not JP5 Unidentified alter » Factory configured - do not JP6 Unidentified alter » Factory configured - do not JP17 Unidentified alter » Factory configured - do not JP18 Unidentified alter » Factory configured - do not JP19 Unidentified alter » Factory configured - do not JP20 Unidentified alter » Factory configured - do not JP21 Unidentified alter » Factory configured - do not JP22 Unidentified alter » Factory configured - do not JP23 Unidentified alter » Factory configured - do not JP4 Unidentified alter » Factory configured - do not JP31 Unidentified alter Monitor type select color JP34 Closed Monitor type select monochrome JP34 Open » CMOS memory normal operation JP35 Pins 2 & 3 closed CMOS memory clear JP35 Pins 3 & 4 closed Battery type select external JP35 Closed 80387 PGA installed JP36 Closed 80387 PQFP installed JP36 Open » Factory configured - do not S1 Unidentified alter » Factory configured - do not S2 Unidentified alter » Factory configured - do not S3 Unidentified alter SIMM 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 5MB (4) 1M x 9 (4) 256K 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 17MB (4) 4M x 9 (4) 256K 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 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 32K x 8 128KB (4) 32K x 8 None (1) 32K 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 SELECTION Type JP7 80386DX (PQFP) Open 80386DX (PGA) Closed CX486DLC (PGA) Closed CX 486DLC Closed CPU TYPE SELECTION Type JP1 JP10 JP11 JP12 JP16 JP33 80386DX-25 Open Closed 1 & 2 2 & 3 2 & 3 1 & 2 80386DX-33 Closed Open 1 & 2 2 & 3 2 & 3 1 & 2 80386DX-40 Open Open 1 & 2 2 & 3 2 & 3 1 & 2 CX486DLC-33 Closed Open 1 & 2 2 & 3 2 & 3 1 & 2 CX486DLC-40 Open Open 1 & 2 2 & 3 2 & 3 1 & 2 80486SX-25 Open Closed 2 & 3 1 & 2 1 & 2 2 & 3 80486DX-33 Closed Open 2 & 3 1 & 2 1 & 2 2 & 3 80486DX-50 Open Closed 1 & 2 1 & 2 1 & 2 2 & 3 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (80486 ONLY) 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