DELL COMPUTER CORPORATION SYSTEM 486P Processor 80486DX Processor Speed 16/20/25/33MHz Chip Set VLSI Max. Onboard DRAM 64MB Cache None BIOS Phoenix Dimensions 349mm x 185mm I/O Options Bus mouse port, floppy interface, IDE interface, parallel port, riser card slot, serial ports (2), video upgrade socket, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location 16-bit riser card EXP1 Auxiliary ground GND points IDE interface LED JHDLED IDE interface JIDE External battery JBAT Power LED & turbo JLED LED Serial port 1 JCOM1 Parallel port JLPT1 Serial port 2 JCOM2 Bus mouse port JMOUSE Cooling fan power JFAN VGA memory JVDB upgrade socket VGA pass-through JFEAT Front panel JVIEW status LCD Floppy drive JFLOP VGA port JVGA interface USER CONFIGURABLE SETTINGS Function Jumper Position » VGA interrupt request select JP5 pins 1 & Closed none 2 VGA interrupt request select JP5 pins 1 & Open IRQ9 2 » Monitor type select color JP5 pins 3 & Closed 4 Monitor type select monochrome JP5 pins 3 & Open 4 » Factory configured - do not JP5 pins 5 & Open alter 6 » Factory configured - do not JP5 pins 7 & Open alter 8 » Password check enabled JP5 pins 9 & Closed 10 Password check disabled JP5 pins 9 & Open 10 » Mouse port enabled (uses IRQ12) JP5 pins 11 & Closed 12 Mouse port disabled (IRQ12 not JP5 pins 11 & Open used) 12 » IOCHRDY signal disabled to IDE JP5 pins 13 & Closed drive(s) 14 Open JP5 pins 15 & 16 IOCHRDY signal enabled to IDE JP5 pins 13 & Open drive(s) 14 Closed JP5 pins 15 & 16 » Bus wait states select none JP5 pins 17 & Closed 18 Bus wait state select one JP5 pins 17 & Open 18 » Factory configured - do not JP5 pins 19 & Open alter 20 » Factory configured - do not CLRB Open alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 1M x 36 (1) 256K x NONE NONE 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x NONE 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x NONE 36 10MB (1) 1M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 13MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 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) 1M x 36 NONE NONE 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x NONE 36 22MB (1) 4M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 25MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 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 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x NONE 36 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 NONE 37MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 256K x 36 40MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 49MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CPU SPEED CONFIGURATION Speed JP1 JP2 JP3 JP4 16MHz Closed Open Open Open 20MHz Open Closed Open Open 25MHz Open Open Closed Open 33MHz Open Open Open Closed