QDI COMPUTER, INC. VL/ISA-PB486P3 Processor 80486SX/SL80486SX/CX486M7/80486DX/SL80486DX/80486DX2/80486DX4/P24D/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set OPTI Max. 64MB Onboard DRAM Cache 64/128/256KB BIOS AMI Dimensions 254mm x 220mm I/O 32-bit VESA local bus slots (3), green PC connector Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Turbo switch J1 Green PC connector JP21 Power LED & keylock J2 Green PC connector JP32 Turbo LED J3 Reset switch S1 Speaker JP18 32-bit VESA local bus SL1 - SL3 slots USER CONFIGURABLE SETTINGS Function Jumper Position » Battery type select internal JP26 pins 2 & 3 closed CMOS memory clear JP26 pins 1 & 2 closed » Monitor type select color JP30 Closed Monitor type select monochrome JP30 Open » Factory configured - do not JP44 pins 2 & 3 alter closed » Factory configured - do not JP46 pins 2 & 3 alter closed Note: The locations of JP44 & JP46 are unknown. DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 1MB (4) 256K x 9 NONE NONE 2MB NONE (1) 512K x 36 NONE 4MB (4) 1M x 9 NONE NONE 4MB NONE (1) 1M x 36 NONE 4MB NONE (1) 512K x 36 (1) 512K x 36 6MB NONE (1) 512K x 36 (1) 1M x 36 8MB (4) 1M x 9 NONE (1) 1M x 36 8MB NONE (1) 2M x 36 NONE 8MB NONE (1) 1M x 36 (1) 1M x 36 10MB NONE (1) 512K x 36 (1) 2M x 36 12MB (4) 1M x 9 NONE (1) 2M x 36 12MB NONE (1) 1M x 36 (1) 2M x 36 16MB (4) 4M x 9 NONE NONE 16MB NONE (1) 4M x 36 NONE 16MB NONE (1) 2M x 36 (1) 2M x 36 20MB (4) 1M x 9 NONE (1) 4M x 36 20MB NONE (1) 1M x 36 (1) 4M x 36 32MB (4) 4M x 9 NONE (1) 4M x 36 32MB NONE (1) 4M x 36 (1) 4M x 36 32MB NONE (1) 8M x 36 NONE 64MB NONE (1) 8M x 36 (1) 8M x 36 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 JP13 JP24 JP25 JP36 64KB Open Open 2 & 3 Closed Closed 2 & 3 128KB Open Closed 1 & 2 Open Open Open 256KB Closed Closed 2 & 3 Closed Closed 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP3 JP4 JP5 JP6 JP7 JP8 80486SX Open Open Open 1 & 2 Open 2 & 3 SL80486SX Open Open Open 1 & 2 Open 2 & 3 CX486M7 (1x) 1 & 2 Open 2 & 3 2 & 3 Open 1 & 2 CX486M7 (2x) 1 & 2 Open 2 & 3 2 & 3 Open 1 & 2 80486DX 1 & 2 Open 2 & 3 1 & 2 Open 1 & 2 SL80486DX 1 & 2 Open 2 & 3 1 & 2 Open 1 & 2 80486DX2 1 & 2 Open 2 & 3 1 & 2 Open 1 & 2 80486DX4 1 & 2 Open 2 & 3 1 & 2 Open 1 & 2 P24D (WB) 1 & 2 Open 2 & 3 1 & 2 1 & 2 1 & 2 P24D (WT) 1 & 2 Open 2 & 3 1 & 2 2 & 3 1 & 2 P24T 1 & 2 Closed 2 & 3 1 & 2 Open 1 & 2 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP9 JP12 JP22 JP23 JP27 JP40 JP43 80486SX Open Open 1 & Open Open Open Open 2 SL80486SX Open Open 1 & Open Open Open Open 2 CX486M7 1 & Open 1 & Open 1 & Open Open (1x) 2 2 2 CX486M7 1 & Open 1 & Open 2 & Open Open (2x) 2 2 3 80486DX Open Open 1 & Open Open Open Open 2 SL80486DX Open Open 1 & Open Open Open Open 2 80486DX2 Open Open 1 & Open Open Open Open 2 80486DX4 Open Open 1 & Open Open Closed see 2 below P24D (WB) 2 & Closed 1 & Closed Open Open Open 3 2 P24D (WT) 2 & Closed 1 & Closed Open Open Open 3 2 P24T 2 & Open 1 & Open Open Open Open 3 2 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP38 JP39 25MHz Open Closed 33MHz Closed Open 40MHz Open Open 50iMHz Open Closed 50MHz Closed Closed 66iMHz Closed Open 75iMHz Open Closed 100iMHz Closed Open CPU CLOCK SPEED CONFIGURATION (80486DX4) Speed JP43 2x Open 2.5x pins 2 & 3 closed 3x pins 1 & 2 closed CPU VOLTAGE CONFIGURATION Voltage JP1 3.3v Open 5v Closed VESA WAIT STATE CONFIGURATION Wait states JP33 0 wait states Open 1 wait state Closed BUS SPEED CONFIGURATION CPU speed JP34 <= 33MHz Open > 33MHz Closed