MYLEX CORPORATION MDE486 Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2 Processor Speed 20/25/33/50(internal)/50/66(internal)MHz Chip Set OPTI Max. Onboard 128MB DRAM Cache 64/128/256/512KB BIOS Mylex Dimensions 330mm x 218mm I/O Options 32-bit external memory card slot, floppy interface, IDE interface, parallel port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location 32-bit external CN1 Reset switch P2 memory card Serial port 1 CN2 Speaker P3 Serial port 2 CN3 Power LED & keylock P4 Parallel port CN4 Turbo LED P5 IDE interface CN5 IDE interface LED P6 Floppy drive CN6 interface USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter J11 Open » Factory configured - do not alter J12 Open » Factory configured - do not alter J20 pins 2 & 3 closed » Factory configured - do not alter J21 pins 1 & 2 closed » Monitor type select color P1 Closed Monitor type select monochrome P1 Open DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (4) 256K x NONE NONE NONE 36 8MB (4) 256K x (4) 256K x NONE NONE 36 36 12MB (4) 256K x (4) 256K x (4) 256K x NONE 36 36 36 16MB (4) 256K x (4) 256K x (4) 256K x (4) 256K x 36 36 36 36 16MB (4) 1M x 36 NONE NONE NONE 20MB (4) 1M x 36 (4) 256K x NONE NONE 36 24MB (4) 1M x 36 (4) 256K x (4) 256K x NONE 36 36 28MB (4) 1M x 36 (4) 256K x (4) 256K x (4) 256K x 36 36 36 32MB (4) 1M x 36 (4) 1M x 36 NONE NONE 36MB (4) 1M x 36 (4) 1M x 36 (4) 256K x NONE 36 40MB (4) 1M x 36 (4) 1M x 36 (4) 256K x (4) 256K x 36 36 48MB (4) 1M x 36 (4) 1M x 36 (4) 1M x 36 NONE 52MB (4) 1M x 36 (4) 1M x 36 (4) 1M x 36 (4) 256K x 36 64MB (4) 1M x 36 (4) 1M x 36 (4) 1M x 36 (4) 1M x 36 64MB (4) 4M x 36 NONE NONE NONE 128MB (4) 4M x 36 (4) 4M x 36 NONE NONE 192MB (4) 4M x 36 (4) 4M x 36 (4) 4M x 36 NONE 256MB (4) 4M x 36 (4) 4M x 36 (4) 4M x 36 (4) 4M x 36 Note:Banks 2 and 3 are used when a 32-bit external memory card is installed at CN1. CACHE CONFIGURATION Size Bank 0 Bank 1 TAG (U19) TAG (U20) 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 (1) 8K x 8 (1) 8K x 8 8 512KB (4) 128K x NONE (1) 32K x 8 NONE 8 CACHE JUMPER CONFIGURATION Size J1 J2 J3 J4 J5 J6 J8 64KB Open Open Open Open Open Open 2 & 3 128KB Open Open Closed Open Closed Open 1 & 2 256KB Open Closed Closed Closed Closed Open 2 & 3 512KB Closed Closed Closed Closed Closed Closed 1 & 2 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type J9 J10 80486SX Open pins 1 & 2, 3 & 4 closed ODP486SX pins 1 & 2 closed pins 2 & 3 closed 80487SX pins 1 & 2 closed pins 2 & 3 closed 80486DX pins 2 & 3 closed pins 1 & 2, 3 & 4 closed 80486DX2 pins 2 & 3 closed pins 1 & 2, 3 & 4 closed CPU SPEED CONFIGURATION Speed J7 J13 J14 J15 J16 J17 J18 J19 20MHz Closed Open Open Closed Open Open 1 & 1 & 2 2 25MHz Open Closed Closed Open Open Open 1 & 2 & 2 3 33MHz Open Open Closed Open Closed Open 1 & 2 & 2 3 50iMHz Open Closed Closed Open Open Open 1 & 2 & 2 3 50MHz Open Open Open Open Closed Closed 2 & 2 & 3 3 66iMHz Open Open Closed Open Closed Open 1 & 2 & 2 3 Note: Pins designated should be in the closed position.