UNIDENTIFIED PM486PU-S3 PCI Processor CX486SX/UMC486SX/80486SX/CX486DX/AM486DX/80486DX/CX486DX2/ AM486DX2/80486DX2/CX486DX4/AM486DX4/AM486DX4(WB)/80486DX4/ P24D/Pentium Overdrive/CXM1 Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ Speed 100(internal)MHz Chip Set UMC Max. 64MB Onboard DRAM Cache 128/256/512KB BIOS Unidentified Dimensions 254mm x 218mm I/O 32-bit PCI slots (3), green PC connector, floppy drive interface, Options IDE interfaces (2), parallel port, serial ports (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery CN1 Green PC connector JP1 Serial port 2 CN2 Turbo switch JP2 Serial port 1 CN3 Turbo LED JP3 Parallel port CN4 Reset switch JP4 Floppy drive interface CN5 Speaker JP5 IDE interface 2 CN6 Power LED & keylock JP6 IDE interface 1 CN7 32-bit PCI slots PC1 - PC3 IDE interface LED J1 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not J20 N/A alter DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (1) 256K x 36 NONE 2MB (1) 256K x 36 (1) 256K x 36 2MB (1) 512K x 36 NONE 3MB (1) 256K x 36 (1) 512K x 36 4MB (1) 512K x 36 (1) 512K x 36 4MB (1) 1M x 36 NONE 5MB (1) 256K x 36 (1) 1M x 36 6MB (1) 512K x 36 (1) 1M x 36 8MB (1) 1M x 36 (1) 1M x 36 8MB (1) 2M x 36 NONE 10MB (1) 512K x 36 (1) 2M x 36 12MB (1) 1M x 36 (1) 2M x 36 16MB (1) 2M x 36 (1) 2M x 36 20MB (1) 1M x 36 (1) 4M x 36 24MB (1) 2M x 36 (1) 4M x 36 32MB (1) 4M x 36 (1) 4M x 36 32MB (1) 8M x 36 NONE 36MB (1) 1M x 36 (1) 8M x 36 40MB (1) 2M x 36 (1) 8M x 36 48MB (1) 4M x 36 (1) 8M x 36 64MB (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 TAG 128KB (4) 32K x 8 (1) 8K or (1) 32K x 8 256KB (4) 64K x 8 (1) 32K x 8 512KB (4) 128K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size J8 128KB Open 256KB pins 1 & 2 closed 512KB pins 1 & 2, 3 & 4 closed CPU TYPE CONFIGURATION Type J2 J3 J5 J6 J7 CX486SX 2 & 3 1 & 2 Open 1 & 2, 3 3 & 4 & 4 UMC486SX 1 & 2 2 & 3 Open Open 1 & 2 80486SX 1 & 2 1 & 2 Open 2 & 3, 4 3 & 4 & 5 CX486DX 2 & 3 1 & 2 Open 1 & 2, 3 3 & 4 & 4 AM486DX 1 & 2 2 & 3 Open Open 1 & 2 80486DX 1 & 2 1 & 2 Open 2 & 3, 4 3 & 4 & 5 CX486DX2 2 & 3 1 & 2 Open 1 & 2, 3 3 & 4 & 4 AM486DX2 1 & 2 2 & 3 2 & 3 Open 1 & 2 80486DX2 1 & 2 1 & 2 Open 2 & 3, 4 3 & 4 & 5 CX486DX4 2 & 3 1 & 2 Open 1 & 2, 3 3 & 4 & 4 AM486DX4 1 & 2 2 & 3 Open Open 1 & 2 AM486DX4 (WB) 1 & 2 2 & 3 2 & 3 Open 1 & 2 80486DX4 1 & 2 1 & 2 Open 2 & 3, 4 3 & 4 & 5 P24D 1 & 2 1 & 2 Open 2 & 3, 4 3 & 4 & 5 P24T 1 & 2 1 & 2 Open 2 & 3, 4 3 & 4, 5 & 5 & 6 CXM1 1 & 2 1 & 2 Open 2 & 3, 4 3 & 4 & 5 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type J9 J10 J12 J13 J14 CX486SX Open 2 & 3 Open Open Open UMC486SX 1 & 2, 3 & 4 Open Open Open 3 & 4 80486SX Open Open Open Open Open CX486DX 3 & 4 2 & 3 Open Open Open AM486DX 1 & 2, 3 & 4 Open Open Open 3 & 4 80486DX 3 & 4 Open Open Open Open CX486DX2 3 & 4 2 & 3 Open Open Open AM486DX2 1 & 2, 3 & 4 Open Open Open 3 & 4 80486DX2 3 & 4 Open Open Open Open CX486DX4 3 & 4 2 & 3 Open Open Open AM486DX4 1 & 2, 3 & 4 Open Open Open 3 & 4 AM486DX4 1 & 2, 3 & 4 Open Open Open (WB) 3 & 4 80486DX4 3 & 4 Open Open Open Open P24D 3 & 4 Open Closed Closed Closed P24T 2 & 3 1 & 2 Open Open Open CXM1 3 & 4 Open Closed Closed Closed Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type J15 J16 J17 J18 J19 J21 CX486SX Open 2 & 3 1 & 2 1 & 2 2 & 3 2 & 3 UMC486SX Open Open Open 2 & 3 Open 2 & 3 80486SX Open 1 & 2 Open 1 & 2 Open 2 & 3 CX486DX Open 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2, 3 & 4 AM486DX Open Open Open 2 & 3 Open 1 & 2, 3 & 4 80486DX Open 1 & 2 Open 1 & 2 Open 1 & 2, 3 & 4 CX486DX2 Open 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2, 3 & 4 AM486DX2 Open Open Open 2 & 3 Open 1 & 2, 3 & 4 80486DX2 Open 1 & 2 Open 1 & 2 Open 1 & 2, 3 & 4 CX486DX4 Open 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2, 3 & 4 AM486DX4 Open Open Open 2 & 3 Open 1 & 2, 3 & 4 AM486DX4 Open Open Open 2 & 3 Open 1 & 2, 3 (WB) & 4 80486DX4 Open 1 & 2 Open 1 & 2 Open 1 & 2, 3 & 4 P24D Open 1 & 2 Open 1 & 2 Open 1 & 2, 3 & 4 P24T Open 1 & 2 2 & 3 1 & 2 1 & 2 1 & 2, 3 & 4 CXM1 Open 1 & 2 Open 1 & 2 Open 1 & 2, 3 & 4 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed J24 pins 1 & 2 J24 pins 3 & 4 J24 pins 5 & 6 20MHz Open Open Open 25MHz Open Open Closed 33MHz Closed Closed Closed 40MHz Open Closed Closed 50iMHz Open Open Closed 50MHz Closed Open Open 66iMHz Closed Closed Closed 75iMHz Open Open Closed 80iMHz Open Closed Closed 100iMHz Closed Closed Closed CPU VOLTAGE CONFIGURATION Voltage J11 3.3v pins 2 & 3 closed 3.45v pins 2 & 3 closed 4v pins 2 & 3 closed 5v pins 1 & 2 closed