COMPAQ COMPUTER CORPORATION
DESKPRO EN
Device Type | Mainboard |
Processor | Pentium II |
Processor Speed | 266/300/333/350/400/450/500/550MHz |
Chip Set | Intel |
Video Chip Set | None |
Maximum Onboard Memory | 384MB (SDRAM supported) |
Maximum Video Memory | None |
Cache | 512KB (located on Pentium II CPU) |
BIOS | Unidentified |
Dimensions | 254mm x 218mm |
I/O Options | 32-bit PCI slots (4), riser slot, AGP slot, serial ports (2), parallel port, PS/2 mouse port, line in, line out, microphone in, headphone in, USB connectors (2), IDE interfaces (2), floppy drive interface, audio in – CD-ROM |
NPU Options | None |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
AGP slot | AGP | Microphone in | CN7 |
Serial port | CN1 | Headphone in | CN8 |
Serial port | CN2 | USB connector | CN9 |
Parallel port | CN3 | USB connector | CN10 |
PS/2 mouse port | CN4 | Chassis fan power | P15 |
Line in | CN5 | Riser slot | SL1 |
Line out | CN6 | ||
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | CMOS memory normal operation | E50 | Pins 1 & 2 closed |
CMOS memory clear | E50 | Pins 2 & 3 closed | |
» | Password enabled | SW1/1 | Off |
Password disabled | SW1/1 | On | |
Auxiliary power supply enabled, main power supply disabled | SW1/6 | Off | |
Auxiliary & main power supply enabled | SW1/6 | On | |
DIMM CONFIGURATION | |||
Size | Bank 0 | Bank 1 | Bank 2 |
8MB | (1) 1M x 64 | None | None |
16MB | (1) 2M x 64 | None | None |
16MB | (1) 1M x 64 | (1) 1M x 64 | None |
24MB | (1) 2M x 64 | (1) 1M x 64 | None |
24MB | (1) 1M x 64 | (1) 1M x 64 | (1) 1M x 64 |
32MB | (1) 4M x 64 | None | None |
32MB | (1) 2M x 64 | (1) 1M x 64 | (1) 1M x 64 |
32MB | (1) 2M x 64 | (1) 2M x 64 | None |
40MB | (1) 4M x 64 | (1) 1M x 64 | None |
40MB | (1) 2M x 64 | (1) 2M x 64 | (1) 1M x 64 |
48MB | (1) 4M x 64 | (1) 1M x 64 | (1) 1M x 64 |
48MB | (1) 4M x 64 | (1) 2M x 64 | None |
48MB | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 |
56MB | (1) 4M x 64 | (1) 2M x 64 | (1) 1M x 64 |
64MB | (1) 8M x 64 | None | None |
64MB | (1) 4M x 64 | (1) 2M x 64 | (1) 2M x 64 |
64MB | (1) 4M x 64 | (1) 4M x 64 | None |
DIMM CONFIGURATION (CON’T) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
72MB | (1) 8M x 64 | (1) 1M x 64 | None |
72MB | (1) 4M x 64 | (1) 4M x 64 | (1) 1M x 64 |
80MB | (1) 8M x 64 | (1) 1M x 64 | (1) 1M x 64 |
80MB | (1) 8M x 64 | (1) 2M x 64 | None |
80MB | (1) 4M x 64 | (1) 4M x 64 | (1) 2M x 64 |
88MB | (1) 8M x 64 | (1) 2M x 64 | (1) 1M x 64 |
96MB | (1) 8M x 64 | (1) 2M x 64 | (1) 2M x 64 |
96MB | (1) 8M x 64 | (1) 4M x 64 | None |
96MB | (1) 4M x 64 | (1) 4M x 64 | (1) 4M x 64 |
104MB | (1) 8M x 64 | (1) 4M x 64 | (1) 1M x 64 |
112MB | (1) 8M x 64 | (1) 4M x 64 | (1) 2M x 64 |
128MB | (1) 16M x 64 | None | None |
128MB | (1) 8M x 64 | (1) 4M x 64 | (1) 4M x 64 |
128MB | (1) 8M x 64 | (1) 8M x 64 | None |
136MB | (1) 16M x 64 | (1) 1M x 64 | None |
136MB | (1) 8M x 64 | (1) 8M x 64 | (1) 1M x 64 |
144MB | (1) 16M x 64 | (1) 1M x 64 | (1) 1M x 64 |
144MB | (1) 16M x 64 | (1) 2M x 64 | None |
144MB | (1) 8M x 64 | (1) 8M x 64 | (1) 2M x 64 |
152MB | (1) 16M x 64 | (1) 2M x 64 | (1) 1M x 64 |
160MB | (1) 16M x 64 | (1) 2M x 64 | (1) 2M x 64 |
160MB | (1) 16M x 64 | (1) 4M x 64 | None |
160MB | (1) 8M x 64 | (1) 8M x 64 | (1) 4M x 64 |
168MB | (1) 16M x 64 | (1) 4M x 64 | (1) 1M x 64 |
176MB | (1) 16M x 64 | (1) 4M x 64 | (1) 2M x 64 |
192MB | (1) 16M x 64 | (1) 4M x 64 | (1) 4M x 64 |
192MB | (1) 16M x 64 | (1) 8M x 64 | None |
192MB | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 |
200MB | (1) 16M x 64 | (1) 8M x 64 | (1) 1M x 64 |
208MB | (1) 16M x 64 | (1) 8M x 64 | (1) 2M x 64 |
224MB | (1) 16M x 64 | (1) 8M x 64 | (1) 4M x 64 |
256MB | (1) 16M x 64 | (1) 8M x 64 | (1) 8M x 64 |
384MB | (1) 16M x 64 | (1) 16M x 64 | (1) 16M x 64 |
CACHE CONFIGURATION |
Note: 512KB cache is located on the Pentium II CPU. |
CPU SPEED SELECTION | ||||||
CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
266MHz | 66MHz | 4x | On | On | Off | On |
300MHz | 66MHz | 4.5x | On | Off | Off | On |
333MHz | 66MHz | 5x | Off | On | Off | On |
350MHz | 100MHz | 3.5x | Off | Off | On | On |
400MHz | 100MHz | 4x | On | On | Off | On |
450MHz | 100MHz | 4.5x | On | Off | Off | On |
500MHz | 100MHz | 5x | Off | On | Off | On |
550MHz | 100MHz | 5.5x | Off | Off | Off | Off |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | P6 | SCSI interface LED | P29 |
Chassis fan power | P8 | 32-bit PCI slots | PC1 – PC4 |
Wake on LAN connector | P9 | ||

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
ATX power connector | ATX | Floppy drive interface | P10 |
Front panel connector | P5 | IDE interface 1 | P20 |
Audio in – CD-ROM | P7 | IDE interface 2 | P21 |