UNIDENTIFIED 3486HN CACHE MAINBOARD Processor AM386DX/80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2 Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set OPTI Max. Onboard 32MB DRAM Cache 64/128/256KB BIOS AMI Dimensions 254mm x 220mm I/O Options None NPU Options 80387DX [Image] CONNECTIONS Purpose Location Purpose Location External battery J2 Turbo LED J44 Power LED & keylock J42 Reset switch J45 Turbo switch J43 Speaker J46 USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation J3 pins 2 & 3 closed CMOS memory clear J3 pins 1 & 2 closed » 80386 speed select 33MHz J4 Closed 80386 speed select 40MHz J4 Open » Factory configured - do not J5 N/A alter » Monitor type select color J6 Closed Monitor type select monochrome J6 Open » 80386 PQFP CPU disabled J24 Closed 80386 PQFP CPU enabled J24 Open » 80486 PQFP CPU disabled J27 Closed 80486 PQFP CPU enabled J27 Open 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 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 (U29) TAG (U30) 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 NONE 128KB (4) 32K x 8 NONE (1) 8K x 8 NONE 256KB (4) 32K x 8 (4) 32K x 8 (1) 8K x 8 (1) 8K x 8 CACHE JUMPER CONFIGURATION Size J34 J36 J37 J38 64KB Open pins 2 & 3 Open Open closed 128KB Closed pins 1 & 2 Closed Open closed 256KB Closed pins 2 & 3 Closed Closed closed CPU TYPE CONFIGURATION Type J23 J31 80386DX pins 1 & 2 closed Open CX486DLC pins 1 & 2 closed Open 80486SX/DX/DX2 pins 2 & 3 closed Closed CPU TYPE CONFIGURATION Type J25 J26 Cyrix Closed Closed AMD/Intel Open Open CPU TYPE CONFIGURATION Type J28 J29 J41 80486SX (PQFP) Closed pins 2 & 3 Open closed 80486 (PGA) Open pins 2 & 3 Open closed 80487SX Open pins 2 & 3 pins 2 & 3 closed closed 80486DX/DX2 Closed pins 1 & 2 pins 1 & 2 closed closed CPU TYPE CONFIGURATION Type J39 J40 80386DX pins 1 & 2 closed pins 2 & 3 closed CX486DLC pins 1 & 2 closed pins 2 & 3 closed 80486DX pins 1 & 2 closed pins 1 & 2 closed 80486DX2 pins 2 & 3 closed pins 2 & 3 closed CPU CLOCK SPEED CONFIGURATION Speed J30 J32 40MHz Closed Closed 50MHz Closed Open 66MHz Open Closed 80MHz Open Open