COMPUTREND SYSTEMS, INC. PCI486 AL2 Processor UMC486SX/80486SX/SL80486SX/UMC486DX/AM486DX/80486DX/ SL80486DX/CX486DX2/AM486DX2/80486DX2/SL80486DX2/AM486DX4/ 80486DX4/P24D/P24T Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz Speed Chip Set ALI Max. 64MB Onboard DRAM Cache 128/256/512KB BIOS AMI Dimensions 270mm x 220mm I/O 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE Options interfaces (2), parallel port, serial ports (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Serial port 1 CN1 Turbo LED JFP pins 12 & 13 Serial port 2 CN2 Turbo switch JFP pins 15 - 17 Parallel port CN3 Reset switch JFP pins 19 & 20 Floppy drive CN4 IDE interface LED JFPA interface IDE interface 2 CN5 Chassis fan power JFAN IDE interface 1 CN6 Green PC connector JG1 (monitor) External battery JB1 Green PC LED JG2 Power LED & JFP pins 1 - Green PC connector JG3 keylock 5 Speaker JFP pins 7 - 32-bit PCI slots PC1 - PC3 10 Note: The location of JFAN is unidentified. USER CONFIGURABLE SETTINGS Function Jumper Position » Battery type select internal JB1 Pins 2 & 3 closed Battery type select external JB1 Closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 36 None None None 8MB (1) 1M x 36 (1) 1M x 36 None None 20MB (1) 1M x 36 (1) 4M x 36 None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 28MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 16MB (1) 4M x 36 None None None 32MB (1) 4M x 36 (1) 4M x 36 None None 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 None (1) 8K/16K/32 x 8 256KB (A) (4) 32K x 8 (4) 32K x 8 (1) 16K/32K x 8 256KB (B) (4) 64K x 8 None (1) 16K/32K x 8 512KB (4) 128K x 8 None (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JS1 JS2 JS3 128KB Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed 256KB (A) Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed 256KB (B) Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 closed closed closed 512KB Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 closed closed closed CPU TYPE CONFIGURATION Type JC1 JC2 JC3 JC4 UMC486SX 2 & 3 2 & 3 Open 1 & 2 80486SX Open 2 & 3 Open Open SL80486SX Open 2 & 3 Open 2 & 3 UMC486DX 2 & 3 1 & 2, 3 & Open 1 & 2 4 AM486DX 2 & 3 1 & 2, 3 & Open Open 4 80486DX 2 & 3 1 & 2, 3 & Open Open 4 SL80486DX 2 & 3 1 & 2, 3 & Open 2 & 3 4 CX486DX2 2 & 3 1 & 2, 3 & 4 & 5 4 & 5 4 AM486DX2 (V8B) 2 & 3 1 & 2, 3 & 1 & 2 5 & 6 2 & 3 4 AM486DX2 (V8T) 2 & 3 1 & 2, 3 & Open Open 4 AM486DX2 2 & 3 1 & 2, 3 & Open Open 4 80486DX2 2 & 3 1 & 2, 3 & Open Open 4 SL80486DX2 2 & 3 1 & 2, 3 & Open 2 & 3 4 SL80486DX2 (OD) 1 & 2 1 & 2, 3 & Open 2 & 3 4 AM486DX4 (V8B) 2 & 3 1 & 2, 3 & 1 & 2 5 & 6 2 & 3 4 AM486DX4 (V8T) 2 & 3 1 & 2, 3 & Open Open 4 80486DX4 2 & 3 1 & 2, 3 & Open 2 & 3 4 P24D 2 & 3 1 & 2, 3 & 1 & 2 2 & 3 4 P24T 2 & 3 1 & 2, 3 & 1 & 2 2 & 3 4 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JC5 JC6 JC7 JC8 JC9 UMC486SX 1 & 2 1 & 2 1 & 2 Closed Open 80486SX 1 & 2 Open 1 & 2 Open Open SL80486SX 2 & 3 2 & 3 1 & 2 Closed Open UMC486DX 1 & 2 1 & 2 1 & 2 Closed Open AM486DX 1 & 2 Open 1 & 2 Open Open 80486DX 1 & 2 Open 1 & 2 Open Open SL80486DX 2 & 3 2 & 3 1 & 2 Closed Open CX486DX2 4 & 5 4 & 5 1 & 2 Closed Open AM486DX2 (V8B) 2 & 3 2 & 3 2 & 3, Closed Open 4 & 5 AM486DX2 (V8T) 1 & 2 Open 1 & 2 Open Open AM486DX2 1 & 2 Open 1 & 2 Open Open 80486DX2 1 & 2 Open 1 & 2 Open Open SL80486DX2 2 & 3 2 & 3 1 & 2 Closed Open SL80486DX2 (OD) 2 & 3 2 & 3 1 & 2 Closed Open AM486DX4 (V8B) 2 & 3 2 & 3 2 & 3, Closed Open 4 & 5 AM486DX4 (V8T) 1 & 2 Open 1 & 2 Open Open 80486DX4 2 & 3 2 & 3 1 & 2 Closed Open P24D 2 & 3 2 & 3 2 & 3, Closed Open 4 & 5 P24T 2 & 3 2 & 3 2 & 3, Closed Open 4 & 5 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JK1 JK2 JK3 25MHz Open Pins 2 & 3 Open closed 33MHz Pins 1 & 2, 3 & Pins 2 & 3 Open 4 closed closed 40MHz Pins 1 & 2 Pins 1 & 2 Closed closed closed 50iMHz Open Pins 2 & 3 Open closed 66iMHz Pins 1 & 2, 3 & Pins 2 & 3 Open 4 closed closed 75iMHz Open Pins 2 & 3 Open closed 80iMHz Pins 1 & 2 Pins 1 & 2 Closed closed closed 100iMHz Pins 1 & 2, 3 & Pins 2 & 3 Open 4 closed closed CPU VOLTAGE CONFIGURATION Voltage J4 JP8 3.45v Pins 4 & 10, 5 & 11, 6 Open & 12 closed 4v Pins 4 & 10, 5 & 11, 6 Closed & 12 closed » 5v Pins 1 & 7, 2 & 8, 3 & Open 9 closed DMA CONFIGURATION DMA JP17 JP18 JP23 JP24 DMA 1 Closed Closed Open Open DMA 3 Open Open Closed Closed