DELL COMPUTER CORPORATION DIMENSION XPS XXX MDT II Device Type Mainboard Processor 80486SX/80486DX/80486DX2/80486DX4/P24T Processor 25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz Speed Chip Set Unidentified Maximum 64MB Onboard Memory Cache 256KB BIOS Unidentified Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2) [Image] CONNECTIONS Purpose Location Purpose Location Turbo LED C1 Serial port 1 CN2 Turbo switch C2 IDE interface 2 CN3 Speaker C3 IDE interface 1 CN4 Reset switch C4 Floppy drive CN5 interface Power LED & keylock C5 PS/2 mouse port J13 IDE interface LED C6 Parallel port J16 Serial port 2 CN1 32-bit VESA local bus SL1 & SL2 slots USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not alter W1 Closed » Monitor type select color W2 Closed Monitor type select monochrome W2 Open » PS/2 mouse IRQ12 enabled W3 Closed PS/2 mouse IRQ12 disabled W3 Open » CMOS memory normal operation W5 Open CMOS memory clear W5 Closed » Factory configured - do not alter W8 Pins 1 & 2 closed » Factory configured - do not alter W10 Pins 1 & 2 closed » Factory configured - do not alter W11 Pins 1 & 2 closed » Factory configured - do not alter W13 Open » Factory configured - do not alter W16 Pins 1 & 2 closed » Factory configured - do not alter W17 Pins 1 & 2 closed » Factory configured - do not alter W18 Open » Factory configured - do not alter W19 Closed » Factory configured - do not alter W22 Pins 1 & 2 closed » Factory configured - do not alter W23 Pins 1 & 2 closed » Factory configured - do not alter W24 Pins 1 & 2 closed » Factory configured - do not alter W25 Open » IDE interface 1 enabled W34 Pins 2 & 3 closed IDE interface 1 disabled W34 Pins 1 & 2 closed » Factory configured - do not alter W35 Open » Parallel port IRQ select IRQ7 W36 Pins 2 & 3 closed Parallel port IRQ select IRQ5 W36 Pins 1 & 2 closed » Factory configured - do not alter W39 Open » Factory configured - do not alter W40 Open » Factory configured - do not alter SW1/2 On » Factory configured - do not alter SW1/3 Off » Factory configured - do not alter SW1/4 Off Note: The location of the factory configured jumpers are unidentified. SIMM 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 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 16MB (1) 4M x 36 None None None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 20MB (1) 4M x 36 (1) 1M x 36 None None 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 4M x 36 None None 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 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 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 256KB (8) 32K x 8 CPU SPEED SELECTION Speed SW1/1 25MHz Off 33MHz On 50iMHz Off 66iMHz On 75iMHz Off 100iMHz On CPU TYPE SELECTION Type W12 80486SX Pins 2 & 3 closed 80486DX Pins 1 & 2 closed 80486DX2 Pins 1 & 2 closed 80486DX4 Pins 1 & 2 closed P24T Pins 1 & 2 closed DMA CHANNEL SELECTION Channel W37 W38 1 Pins 2 & 3 Pins 2 & 3 closed closed » 3 Pins 1 & 2 Pins 1 & 2 closed closed