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 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
16-bit riser card |
EXP1 |
Auxiliary ground points |
GND |
|
IDE interface LED |
JHDLED |
IDE interface |
JIDE |
|
External battery |
JBAT |
Power LED & turbo LED |
JLED |
|
Serial port 1 |
JCOM1 |
Parallel port |
JLPT1 |
|
Serial port 2 |
JCOM2 |
Bus mouse port |
JMOUSE |
|
Cooling fan power |
JFAN |
VGA memory upgrade socket |
JVDB |
|
VGA pass-through |
JFEAT |
Front panel status LCD |
JVIEW |
|
Floppy drive interface |
JFLOP |
VGA port |
JVGA |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
VGA interrupt request select none |
JP5 pins 1 & 2 |
Closed |
|
VGA interrupt request select IRQ9 |
JP5 pins 1 & 2 |
Open | |
| » |
Monitor type select color |
JP5 pins 3 & 4 |
Closed |
|
Monitor type select monochrome |
JP5 pins 3 & 4 |
Open | |
| » |
Factory configured - do not alter |
JP5 pins 5 & 6 |
Open |
| » |
Factory configured - do not alter |
JP5 pins 7 & 8 |
Open |
| » |
Password check enabled |
JP5 pins 9 & 10 |
Closed |
|
Password check disabled |
JP5 pins 9 & 10 |
Open | |
| » |
Mouse port enabled (uses IRQ12) |
JP5 pins 11 & 12 |
Closed |
|
Mouse port disabled (IRQ12 not used) |
JP5 pins 11 & 12 |
Open | |
| » |
IOCHRDY signal disabled to IDE drive(s) |
JP5 pins 13 & 14 JP5 pins 15 & 16 |
Closed Open |
|
IOCHRDY signal enabled to IDE drive(s) |
JP5 pins 13 & 14 JP5 pins 15 & 16 |
Open Closed | |
| » |
Bus wait states select none |
JP5 pins 17 & 18 |
Closed |
|
Bus wait state select one |
JP5 pins 17 & 18 |
Open | |
| » |
Factory configured - do not alter |
JP5 pins 19 & 20 |
Open |
| » |
Factory configured - do not alter |
CLRB |
Open |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
5MB |
(1) 1M x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
6MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
7MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
9MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
NONE |
|
10MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 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 36 |
NONE |
NONE |
|
18MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
19MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
20MB |
(1) 4M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
21MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
NONE |
|
22MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 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 36 |
NONE |
|
34MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 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 |