INTEL CORPORATION 486-GL GREEN/VESA Processor CX486S/CX486S2/80486SX/80487SX/CX486DX/80486DX/CX486DX2/ 80486DX2/80486DX4/Pentium Overdrive Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set OPTI Max. 128MB Onboard DRAM Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O 32-bit VESA local bus slots (3), green PC connectors (2) Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Green PC connector JP21 (hardware) Power LED & keylock J2 Green PC connector JP32 (monitor) Turbo switch JP16 Reset switch S1 Turbo LED JP17 32-bit VESA local bus SL1 - SL3 slots Speaker JP18 USER CONFIGURABLE SETTINGS Function Jumper Position » CPU type select PGA JP1 Closed CPU type select PQFP JP1 Open » CMOS memory normal operation 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 » Intel SMI CPU JP45 Closed Non Intel SMI CPU JP45 Open DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 256K x (1) 256K x NONE NONE 36 36 2MB NONE (1) 512K x NONE NONE 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB NONE (1) 512K x NONE (1) 512K x 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 6MB (1) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 6MB NONE (1) 512K x (1) 1M x 36 NONE 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB NONE (1) 2M x 36 NONE NONE 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 10MB NONE (1) 512K x (1) 1M x 36 (1) 1M x 36 36 10MB (1) 256K x (1) 256K x NONE (1) 2M x 36 36 36 10MB NONE (1) 512K x NONE (1) 2M x 36 36 12MB (1) 1M x 36 NONE (1) 1M x 36 (1) 1M x 36 12MB (1) 1M x 36 NONE NONE (1) 2M x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB NONE (1) 2M x 36 NONE (1) 2M x 36 16MB (1) 4M x 36 NONE NONE NONE 17MB (1) 256K x (1) 4M x 36 NONE NONE 36 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB NONE (1) 8M x 36 NONE NONE 40MB (1) 4M x 36 (1) 4M x 36 (1) 2M x 36 NONE 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB NONE (1) 8M x 36 NONE (1) 8M x 36 64MB (1) 16M x 36 NONE NONE NONE 128MB (1) 16M x 36 (1) 16M x 36 NONE NONE 128MB NONE (1) 32M x 36 NONE 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) 16K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP10 JP11 JP13 JP35 64KB Open Open pins 2 & 3 pins 1 & 2 closed closed 128KB Open Closed pins 1 & 2 pins 1 & 2 closed closed 256KB Closed Closed pins 2 & 3 pins 1 & 2 closed closed 256KB Closed Closed pins 2 & 3 pins 2 & 3 closed closed CPU TYPE CONFIGURATION Type JP6 JP7 80486SX Open Open 80486DX Closed Closed CPU TYPE CONFIGURATION Type JP27 JP43 AMD SMI Open Open Intel SL Open Open CX486DX (1x) pins 1 & 2 closed Open CX486DX (2x) pins 2 & 3 closed Open 80486DX4 (2x) Open pins 1 & 2 closed 80486DX4 (3x) Open Open Other CPU types Open Open CPU TYPE CONFIGURATION Type JP3 JP5 JP8 JP9 CX486S Open Open pins 2 & 3 pins 1 & 2 closed closed 80486SX Open Open pins 2 & 3 Open closed 80487SX pins 2 & 3 pins 2 & 3 pins 1 & 2 Open closed closed closed CX4786DX pins 1 & 2 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed closed 80486DX/DX2 pins 1 & 2 pins 2 & 3 pins 1 & 2 Open closed closed closed 80486DX4 pins 1 & 2 pins 2 & 3 pins 1 & 2 Open closed closed closed P24T pins 1 & 2 pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed closed P24D Open Open Open Open CPU TYPE CONFIGURATION (CON’T) Type JP12 JP22 JP23 JP50 CX486S Open pins 1 & 2 Open pins 2 & 3 closed closed 80486SX Open pins 1 & 2 Open Open closed 80487SX Open pins 1 & 2 Open Open closed CX4786DX Open pins 1 & 2 Open pins 2 & 3 closed closed 80486DX/DX2 Open pins 1 & 2 Open Open closed 80486DX4 Open pins 1 & 2 Open Open closed P24T Open pins 2 & 3 Open Open closed P24D Closed Open Closed pins 1 & 2 closed CPU SPEED CONFIGURATION Speed JJ2 JP38 JP39 JP40 JP48 20MHz 1 & 2 Open Closed Open 1 & 2 25MHz 1 & 2 Closed Closed Open 1 & 2 33MHz 1 & 2 Closed Open Closed 1 & 2 33iMHz 1 & 2 Closed Open Closed 2 & 3 (DX4) 40MHz 1 & 2 Open Closed Closed 1 & 2 50iMHz 1 & 2 Closed Closed Open 1 & 2 50MHz 1 & 2 Closed Closed Closed 1 & 2 50iMHz 2 & 3 Closed Closed Open 2 & 3 (DX4) 66iMHz 1 & 2 Closed Open Closed 1 & 2 Note: Pins designated should be in the closed position. CPU VOLTAGE CONFIGURATION Voltage JP2 3.3v pins 2 & 3, 5 & 6 closed 5.0v pins 1 & 2, 4 & 5 closed BUS SPEED CONFIGURATION CPU speed JP46 <= 33MHz pins 2 & 3 closed > 33MHz pins 1 & 2 closed