DELL COMPUTER CORPORATION System 4XXDE Processor 80486SX/80487SX/80486DX Processor Speed 20/25/33/50MHz Chip Set VLSI Max. Onboard DRAM 48MB (96MB on revision 1.1 or higher) Cache None (128KB on 450DE and 433DE) BIOS AMI Dimensions 329mm x 334mm I/O Options 32-bit external CPU card slot, bus mouse, floppy drive interface, IDE interface, status LCD, parallel port, serial ports (2), VGA port NPU Options None (4167 on 433DE) [Image] CONNECTIONS Purpose Location Purpose Location VGA port CN1 External battery JBAT Parallel port CN2 Cooling fan JFAN Serial port 2 CN3 VGA pass-through JFEAT Serial port 1 CN4 Primary floppy drive JFLOP interface Bus mouse port CN5 IDE interface JIDE Board ground GND Front panel status JVIEW points LCD IDE interface LED JLED Reset switch RSET USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Boot EEPROM write/clear BOOT Closed enabled Boot EEPROM write/clear BOOT Open disabled » Factory test disabled MNT Open Factory test enabled MNT Closed » VGA interface enabled SW1/1 Off VGA interface disabled SW1/1 On » Monitor type select fixed SW1/2 Off frequency Monitor type select multi SW1/2 On frequency » Password check enabled SW1/3 On Password check disabled SW1/3 Off » BIOS chip select flash SW1/4 Off EEPROM BIOS chip select auxiliary SW1/4 On ROM DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 Bank 4 Bank 5 4MB (1)512K (1)512K NONE NONE NONE NONE x 36 x 36 6MB (1)512K (1)512K (1)256K (1)256K NONE NONE x 36 x 36 x 36 x 36 6MB (1)256K (1)256K (1)256K (1)256K (1)256K (1)256K x x 36 x 36 x 36 x 36 x 36 36 8MB (1)512K (1)512K (1)256K (1)256K (1)256K (1)256K x x 36 x 36 x 36 x 36 x 36 36 8MB (1)512K (1)512K (1)512K (1)512K NONE NONE x 36 x 36 x 36 x 36 8MB (1) 1M x (1) 1M x NONE NONE NONE NONE 36 36 10MB (1)512K (1)512K (1)512K (1)512K (1)256K (1)256K x x 36 x 36 x 36 x 36 x 36 36 10MB (1) 1M x (1) 1M x (1)256K (1)256K NONE NONE 36 36 x 36 x 36 12MB (1) 1M x (1) 1M x (1)256K (1)256K (1)256K (1)256K x 36 36 x 36 x 36 x 36 36 12MB (1) 1M x (1) 1M x (1)512K (1)512K NONE NONE 36 36 x 36 x 36 12MB (1)512K (1)512K (1)512K (1)512K (1)512K (1)512K x x 36 x 36 x 36 x 36 x 36 36 14MB (1) 1M x (1) 1M x (1)512K (1)512K (1)256K (1)256K x 36 36 x 36 x 36 x 36 36 16MB (1) 1M x (1) 1M x (1)512K (1)512K (1)512K (1)512K x 36 36 x 36 x 36 x 36 36 16MB (1) 1M x (1) 1M x (1) 1M x (1) 1M x NONE NONE 36 36 36 36 16MB (1) 2M x (1) 2M x NONE NONE NONE NONE 36 36 18MB (1) 1M x (1) 1M x (1) 1M x (1) 1M x (1)256K (1)256K x 36 36 36 36 x 36 36 18MB (1) 2M x (1) 2M x (1)256K (1)256K NONE NONE 36 36 x 36 x 36 20MB (1) 2M x (1) 2M x (1)256K (1)256K (1)256K (1)256K x 36 36 x 36 x 36 x 36 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 Bank 4 Bank 5 20MB (1) 1M (1) 1M (1) 1M x (1) 1M x (1)512K x (1)512K x x 36 x 36 36 36 36 36 20MB (1) 2M (1) 2M (1)512K x (1)512K x NONE NONE x 36 x 36 36 36 22MB (1) 2M (1) 2M (1)512K x (1)512K x (1)256K x (1)256K x x 36 x 36 36 36 36 36 24MB (1) 2M (1) 2M (1) 1M x (1) 1M x NONE NONE x 36 x 36 36 36 24MB (1) 2M (1) 2M (1)512K x (1)512K x (1)512K x (1)512K x x 36 x 36 36 36 36 36 26MB (1) 2M (1) 2M (1) 1M x (1) 1M x (1)256K x (1)256K x x 36 x 36 36 36 36 36 28MB (1) 2M (1) 2M (1) 1M x (1) 1M x (1)512K x (1)512K x x 36 x 36 36 36 36 36 32MB (1) 2M (1) 2M (1) 2M x (1) 2M x NONE NONE x 36 x 36 36 36 32MB (1) 2M (1) 2M (1) 1M x (1) 1M x (1) 1M x (1) 1M x x 36 x 36 36 36 36 36 32MB (1) 4M (1) 4M NONE NONE NONE NONE x 36 x 36 34MB (1) 2M (1) 2M (1) 2M x (1) 2M x (1)256K x (1)256K x x 36 x 36 36 36 36 36 34MB (1) 4M (1) 4M (1)256K x (1)256K x NONE NONE x 36 x 36 36 36 36MB (1) 2M (1) 2M (1) 2M x (1) 2M x (1)512K x (1)512K x x 36 x 36 36 36 36 36 38MB (1) 4M (1) 4M (1)512K x (1)512K x (1)256K x (1)256K x x 36 x 36 36 36 36 36 40MB (1) 2M (1) 2M (1) 2M x (1) 2M x (1) 1M x (1) 1M x x 36 x 36 36 36 36 36 40MB (1) 4M (1) 4M (1) 1M x (1) 1M x NONE NONE x 36 x 36 36 36 42MB (1) 4M (1) 4M (1) 1M x (1) 1M x (1)256K x (1)256K x x 36 x 36 36 36 36 36 48MB (1) 2M (1) 2M (1) 2M x (1) 2M x (1) 2M x (1) 2M x x 36 x 36 36 36 36 36 48MB (1) 4M (1) 4M (1) 2M x (1) 2M x NONE NONE x 36 x 36 36 36 50MB (1) 4M (1) 4M (1) 2M x (1) 2M x (1)256K x (1)256K x x 36 x 36 36 36 36 36 52MB (1) 4M (1) 4M (1) 2M x (1) 2M x (1)512K x (1)512K x x 36 x 36 36 36 36 36 56MB (1) 4M (1) 4M (1) 2M x (1) 2M x (1) 1M x (1) 1M x x 36 x 36 36 36 36 36 64MB (1) 4M (1) 4M (1) 2M x (1) 2M x (1) 2M x (1) 2M x x 36 x 36 36 36 36 36 64MB (1) 4M (1) 4M (1) 4M x (1) 4M x NONE NONE x 36 x 36 36 36 66MB (1) 4M (1) 4M (1) 4M x (1) 4M x (1)256K x (1)256K x x 36 x 36 36 36 36 36 68MB (1) 4M (1) 4M (1) 4M x (1) 4M x (1)512K x (1)512K x x 36 x 36 36 36 36 36 72MB (1) 4M (1) 4M (1) 4M x (1) 4M x (1) 1M x (1) 1M x x 36 x 36 36 36 36 36 80MB (1) 4M (1) 4M (1) 4M x (1) 4M x (1) 2M x (1) 2M x x 36 x 36 36 36 36 36 96MB (1) 4M (1) 4M (1) 4M x (1) 4M x (1) 4M x (1) 4M x x 36 x 36 36 36 36 36