UNIDENTIFIED PCI/ISA UD486GRN Processor CX486SX/80486SX/SL80486SX/SL80486SX2/CX486DX/AM486DX/UMCU5S/ SL80486DX/CX486DX2/AM486DX2/SL80486DX2/AM486DX4/80486DX4 Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set UMC Max. 128MB Onboard DRAM Cache 128/256/512KB BIOS Unidentified Dimensions 220mm x 220mm I/O 32-bit PCI slots (3), green PC connector, IDE interfaces (2) Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Speaker CN1 Turbo switch JP29 Power LED & keylock CN2 Turbo LED JP30 IDE interface JH1 Reset switch JP31 IDE interface JH2 IDE interface LED JP32 Green PC connector JP26 32-bit PCI slots PC1 - PC3 USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation JC Closed CMOS memory clear JC Open IDE interface enabled JP2 Open IDE interface disabled JP2 Closed » Port address fixed JP3 Closed Port address relocatable JP3 Open » Factory configured - do not alter JP10 Open » Factory configured - do not alter JP15 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 256K x (1) 256K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 4MB NONE (1) 1M x 36 NONE NONE 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB NONE NONE (1) 2M x 36 NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 NONE NONE 16MB (1) 4M x 36 NONE NONE NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB NONE NONE (1) 4M x 36 (1) 4M x 36 32MB (1) 8M x 36 NONE NONE NONE 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 64MB (1) 8M x 36 (1) 8M x 36 NONE NONE 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 TAG 128KB (4) 32K x 8 (1) 8K x 8 256KB (4) 64K x 8 (1) 32K x 8 512KB (4) 128K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP22 JP23 pins 1 JP23 pins 3 JP25 & 2 & 4 128KB Open Closed Open pins 1 & 2 closed 256KB Open Closed Closed pins 2 & 3 closed 512KB Closed Closed Closed pins 2 & 3 closed CPU TYPE CONFIGURATION Type JP7 JP11 JP12 JP13 JP14 CX486SX Open 1 & 2 Open 2 & 3 1 & 2, 3 & 4 80486SX Closed Open Open 2 & 3 Open SL80486SX Closed Open Open 2 & 3 2 & 3, 4 & 5 SL80486SX2 Closed Open Open 2 & 3 2 & 3, 4 & 5 CX486DX Open 1 & 2 3 & 4 1 & 2, 3 1 & 2, 3 & 4 & 4 AM486DX Closed Open 3 & 4 1 & 2, 3 Open & 4 UMCU5S Closed Open 1 & 2 2 & 3 Open SL80486DX Closed Open 3 & 4 1 & 2, 3 2 & 3, 4 & 4 & 5 CX486DX2 Open 1 & 2 3 & 4 1 & 2, 3 1 & 2, 3 & 4 & 4 AM486DX2 Closed Open 3 & 4 1 & 2, 3 Open & 4 SL80486DX2 Closed Open 3 & 4 1 & 2, 3 2 & 3, 4 & 4 & 5 AM486DX4 Closed Open 3 & 4 1 & 2, 3 Open & 4 80486DX4 Closed Open 3 & 4 1 & 2, 3 2 & 3, 4 & 4 & 5 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP16 JP17 JP19 JP20 JP21 JP24 CX486SX 2 & 3 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 80486SX 1 & 2 1 & 2 Open Open Open Open SL80486SX 1 & 2 1 & 2 Open 1 & 2 1 & 2 Open SL80486SX2 1 & 2 1 & 2 Open 1 & 2 1 & 2 Open CX486DX 2 & 3 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 AM486DX 1 & 2 1 & 2 Open Open Open Open UMCU5S 1 & 2 2 & 3 Open 2 & 3 Open 3 & 4 SL80486DX 1 & 2 1 & 2 Open 1 & 2 1 & 2 Open CX486DX2 2 & 3 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 AM486DX2 1 & 2 1 & 2 Open Open Open Open SL80486DX2 1 & 2 1 & 2 Open 1 & 2 1 & 2 Open AM486DX4 1 & 2 1 & 2 Open Open Open Open 80486DX4 1 & 2 1 & 2 Open 1 & 2 1 & 2 Open Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP18 pins 1 & 2 JP18 pins 3 & 4 JP18 pins 5 & 6 25MHz Open Open Open 33MHz Closed Closed Open 40MHz Open Closed Open 50iMHz Open Open Open 50MHz Closed Open Open 66iMHz Closed Closed Open 75iMHz Open Open Open 100iMHz Closed Closed Open CPU SPEED CONFIGURATION (80486DX4 ONLY) Speed JP9 2x Closed 3x Open KEYBOARD CONFIGURATION Setting JP1 JP4 JP5 JP6 JP27 JP28 Internal 7 & 8, 9 & 1 & 2 1 & 2 1 & 2 2 & 3 1 & 2 10 External 1 & 3, 2 & 2 & 3 2 & 3 2 & 3 1 & 2 2 & 3 4, 5 & 7, 6 & 8 Note: Pins designated should be in the closed position. MISCELLANEOUS TECHNICAL NOTE Note: The location of pin 1 is unidentified. Jumpers are shown for location purposes only. The actual location may vary.