MYLEX CORPORATION MPXS486 Processor 80486SX/ODP486/CX486DX/(SL)AM486DX/SL80486DX/CX486DX2/ CX486DX2V/UMC U5S/AM486DX2/(SL)AM486DX2/SL80486DX2/ AM486DX4/80486DX4/P24D/P24T Processor 25/33/40/50(internal)/50/63(internal)/66(internal)/75(internal)/ Speed 80(internal)/83(internal)/100(internal)MHz Chip Set Unidentified Video Chip None Set Maximum 128MB Onboard Memory Maximum None Video Memory Cache 128/256/512/1024KB BIOS Award Dimensions 250mm x 220mm I/O 32-bit PCI slots (3), floppy drive interface, game interface, Options green PC connector, IDE interfaces (2), parallel port, serial ports (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location Floppy drive interface CN1 IDE interface LED 2 JP15 Serial port 1 CN2 Green PC connector JP29 Serial port 2 CN3 Green PC LED JP27 Game interface CN4 Turbo switch JP35 Parallel port CN5 Turbo LED JP36 IDE interface 2 CN6 Speaker JP37 IDE interface 1 CN7 Reset switch JP44 External battery JP12 Power LED & keylock JP45 IDE interface LED 1 JP14 32-bit PCI slots PC1 – PC3 USER CONFIGURABLE SETTINGS Function Label Position » CMOS memory normal operation JP13 Pins 1 & 2 closed CMOS memory clear JP13 Pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x None None None 36 2MB (1) 512K x None None None 36 2MB (1) 256K x (1) 256K x None None 36 36 3MB (1) 512K x (1) 256K x None None 36 36 3MB (1) 256K x (1) 256K x (1) 256K x None 36 36 36 4MB (1) 1M x 36 None None None 4MB (1) 512K x (1) 512K x None None 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 5MB (1) 1M x 36 (1) 256K x None None 36 5MB (1) 512K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x None 36 36 6MB (1) 1M x 36 (1) 512K x None None 36 6MB (1) 512K x (1) 512K x (1) 512K x None 36 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 2M x 36 None None None 8MB (1) 1M x 36 (1) 512K x (1) 512K x None 36 36 8MB (1) 1M x 36 (1) 1M x 36 None None 8MB (1) 512K x (1) 512K x (1) 512K x (1) 512K x 36 36 36 36 9MB (1) 2M x 36 (1) 256K x None None 36 10MB (1) 2M x 36 (1) 256K x (1) 256K x None 36 36 10MB (1) 2M x 36 (1) 512K x None None 36 10MB (1) 1M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 11MB (1) 2M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 12MB (1) 2M x 36 (1) 512K x (1) 512K x None 36 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 12MB (1) 2M x 36 (1) 1M x 36 None None 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 14MB (1) 2M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 16MB (1) 4M x 36 None None None 16MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 None 16MB (1) 2M x 36 (1) 2M x 36 None None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 17MB (1) 4M x 36 (1) 256K x None None 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x None 36 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 20MB (1) 4M x 36 (1) 512K x (1) 512K x None 36 36 20MB (1) 4M x 36 (1) 1M x 36 None None 20MB (1) 2M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 20MB (1) 1M x 36 (1) 4M x 36 None None 22MB (1) 4M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 24MB (1) 4M x 36 (1) 2M x 36 None None 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 None 24MB (1) 2M x 36 (1) 4M x 36 None None 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 8M x 36 None None None 32MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 None 32MB (1) 4M x 36 (1) 4M x 36 None None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 33MB (1) 8M x 36 (1) 256K x None None 36 34MB (1) 8M x 36 (1) 512K x None None 36 35MB (1) 8M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 36MB (1) 8M x 36 (1) 512K x (1) 512K x None 36 36 36MB (1) 8M x 36 (1) 1M x 36 None None 38MB (1) 8M x 36 (1) 512K x (1) 512K x (1) 512K x 36 36 36 40MB (1) 8M x 36 (1) 1M x 36 (1) 1M x 36 None 40MB (1) 8M x 36 (1) 2M x 36 None None 40MB (1) 4M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 44MB (1) 8M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 48MB (1) 8M x 36 (1) 2M x 36 (1) 2M x 36 None 48MB (1) 8M x 36 (1) 4M x 36 None None 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 52MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 56MB (1) 8M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 56MB (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 4M x 36 (1) 4M x 36 None DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 64MB (1) 8M x 36 (1) 8M x 36 None None 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 80MB (1) 8M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 80MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 None 96MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 None 100MB (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 104MB (1) 2M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 112MB (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 128MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 128KB (4) 32K x 8 None (1) 8K x 8 256KB (A) (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 256KB (B) (4) 64K x 8 None (1) 32K x 8 512KB (A) (4) 64K x 8 (4) 64K x 8 (1) 32K x 8 512KB (B) (4) 128K x 8 None (1) 32K x 8 1MB (4) 128K x 8 (4) 128K x 8 (1) 64K x 8 CACHE JUMPER CONFIGURATION Size JP17 JP18 JP19 JP20 JP25 JP26 128KB 1 & 2 2 & 3 2 & 3 1 & 2 1 & 2 1 & 2 256KB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 1 & 2 (A) 256KB 1 & 2 2 & 3 1 & 2 1 & 2 2 & 3 1 & 2 (B) 512KB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 (A) 512KB 1 & 2 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 (B) 1MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note: Pins designated should be in the closed position. CPU SPEED SELECTION Speed JP22 JP23 25MHz Pins 2 & 3 closed Pins 2 & 3 closed 33MHz Pins 1 & 2 closed Pins 1 & 2 closed 40MHz Pins 1 & 2 closed Pins 2 & 3 closed 50iMHz Pins 2 & 3 closed Pins 2 & 3 closed 50MHz Pins 2 & 3 closed Pins 1 & 2 closed 63iMHz Pins 2 & 3 closed Pins 2 & 3 closed 66iMHz Pins 1 & 2 closed Pins 1 & 2 closed 75iMHz Pins 2 & 3 closed Pins 2 & 3 closed 80iMHz Pins 1 & 2 closed Pins 2 & 3 closed 83iMHz Pins 1 & 2 closed Pins 1 & 2 closed 100iMHz Pins 1 & 2 closed Pins 1 & 2 closed CPU TYPE SELECTION Type J2 J3 J4 J5 J6 J7 80486SX Closed Open Open Open Closed Open ODP486 Open Closed Open Open Closed Open CX486DX Open Closed Open Closed Open Open (SL) Open Closed Open Open Closed Open AM486DX SL80486DX Open Closed Open Open Closed Open CX486DX2 Open Closed Open Closed Open Open CX486DX2V Open Closed Open Closed Open Open UMC U5S Closed Open Open Open Closed Open AM486DX2 Open Closed Open Open Closed Open (SL) Open Closed Open Open Closed Open AM486DX2 SL80486DX2 Open Closed Open Open Closed Open AM486DX4 Open Closed Open Open Closed Open 80486DX4 Open Closed Open Open Closed Open P24D Open Open Closed Open Open Closed P24T Open Open Closed Open Open Closed CPU TYPE SELECTION (CON’T) Type JP31 JP39 JP40 JP42 JP43 80486SX 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 ODP486 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 CX486DX 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 (SL) AM486DX 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 SL80486DX 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 CX486DX2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 CX486DX2V 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 UMC U5S 2 & 3 2 & 3 2 & 3 1 & 2 1 & 2 AM486DX2 1 & 2 1 & 2 1 & 2 2 & 3 1 & 2 (SL) AM486DX2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 SL80486DX2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 AM486DX4 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 80486DX4 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 P24D 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 P24T 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 Note: Pins designated should be in the closed position. CPU MULTIPLIER SELECTION (80486DX4 ONLY) Multiplier JP41 2x Pins 2 & 3 closed 3x Open CPU VOLTAGE SELECTION Voltage JP32A JP32B JP32C JP38 3.3v Open Open Open Pins 1 & 2 closed 4v Open Open Open Pins 2 & 3 closed » 5v Closed Closed Closed Pins 2 & 3 closed PCI BUS SPEED SELECTION Speed JP21 <= 33MHz Pins 1 & 2 closed >33 MHz Pins 2 & 3 closed DMA CHANNEL SELECTION Channel JP1 JP2 1 Pins 1 & 2 closed Pins 1 & 2 closed 3 Pins 2 & 3 closed Pins 2 & 3 closed