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Compaq Deskpro 386
Description
The Compaq Deskpro 386 was a intel 80386 based desktop computer released by Compaq in 1986 and introduced in 3 clock speeds in this original version. Most seem to be released under the model number 2571 despite the clock-speed, in which it came in 3 different clock speeds. This model was later replaced by the Deskpro 386s/20, 386/20e, and similar models.
Technical Details
This was the last Compaq model to make use of the original Deskpro style chassis and general form factor. Back was the single ribbon cable power supply, 4-power ports on the motherboard, shock-absorbing drive cage, and front-mounted AT keyboard jack of the original.
Specifications
- Intel 80386 DX CPU in 16Mhz, 20MHz, or 25MHz configurations
- Support for an 80387 Math Co-Processor (optional) Standard
- Proprietary Memory board for up to 16MB of RAM using DIP Memory and Daughtercard Expansion Cards
- Available with 360K, 1.2M, 720K, 1.44M floppy drives (up to two)
- Available with HDD in capacities ranging from 40MB to 310MB in size
- Tape Backup Drive available as an option
- Quadram QuadEGA Graphics, also availible later with VGA
- Other option boards for Serial/Parallel/Networking also available
- Originally shipped with Compaq Branded DOS up to version 5.00
The original releases had the smaller silver label that just said "Compaq Deskpro 386" on it. When 20MHz Models became available, a larger logo saying "Compaq Deskpro 386/20" started to appear. Very late builds of the 20 and 25MHz Models have a gray bezel inset instead of a dark blackish-brown one (the gray is not that common), which was around the time Compaq was re-styling the computer for the later s/e/i series models.
Jumper Settings (Type 'A')
Processor |
80386DX |
Processor Speed |
16MHz |
Chip Set |
ETEQ |
Max. Onboard DRAM |
2MB (on system memory card) |
Cache |
None |
BIOS |
Compaq |
Dimensions |
330mm x 218mm |
I/O Options |
Proprietary system memory card slot, proprietary external memory card slot (on system memory card) |
NPU Options |
80287 |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
Fixed drive power |
J109 |
Proprietary keyboard plug |
J116 |
Tape backup power |
J110 |
Main power |
J117 |
Floppy drive power |
J111 |
External battery |
J118 |
Floppy drive power |
J112 |
Keylock |
J119 |
Monitor power |
J113 |
Proprietary system memory card |
S1 |
Speaker |
J115 |
USER CONFIGURABLE SETTINGS | |||
Function |
Switch |
Position | |
» |
Fail-safe timer enabled |
SW1/1 |
On |
Fail-safe timer disabled |
SW1/1 |
Off | |
» |
NPU enabled |
SW1/2 |
On |
NPU disabled |
SW1/2 |
Off | |
» |
NPU type select 4MHz |
SW1/3 |
On |
NPU type select 8MHz |
SW1/3 |
Off | |
» |
CPU speed at boot automatic |
SW1/4 |
On |
» |
CPU speed at boot high |
SW1/4 |
Off |
» |
Factory configured - do not alter |
SW1/5 |
Off |
» |
Monitor type select dual-mode/color |
SW1/6 |
On |
Monitor type select monochrome other than Compaq |
SW1/6 |
Off | |
» |
Factory configured - do not alter |
SW1/7 |
On |
» |
Factory configured - do not alter |
SW1/8 |
On |
CONNECTIONS | |
Purpose |
Location |
Proprietary external memory card |
S1 & S2 |
DRAM CONFIGURATION | ||
Size |
Bank 0 |
Bank 1 |
1MB |
(36) 41256 |
NONE |
2MB |
(36) 41256 |
(36) 41256 |
DRAM CONFIGURATION | ||||
Size |
Base Memory |
Ext. Memory |
1MBExp. Memory |
J1 |
1MB |
256KB |
768KB |
disabled |
pins 1 & 2, 4 & 5, 7 & 8 closed |
1MB |
512KB |
512KB |
disabled |
pins 2 & 3, 4 & 5, 7 & 8 closed |
1MB |
640KB |
384KB |
disabled |
pins 2 & 3, 5 & 6, 7 & 8 closed |
2MB |
256KB |
768KB |
enabled |
pins 1 & 2, 4 & 5, 8 & 9 closed |
2MB |
512KB |
512KB |
enabled |
pins 2 & 3, 4 & 5, 8 & 9 closed |
2MB |
640KB |
384KB |
enabled |
pins 2 & 3, 5 & 6, 8 & 9 closed |
Note:Jumpers 3 & 4 and 6 & 7 should never be closed as serious damage to the system may result. |
Jumper Settings (Type 'B')
Processor |
80386DX |
Processor Speed |
16MHz |
Chip Set |
ETEQ |
Max. Onboard DRAM |
2MB (on system memory card) |
Cache |
None |
BIOS |
Compaq |
Dimensions |
330mm x 218mm |
I/O Options |
Proprietary system memory card slot, proprietary external memory card slot (on system memory card) |
NPU Options |
80287/80387 |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
Fixed drive power |
J109 |
Proprietary keyboard plug |
J116 |
Tape backup power |
J110 |
Main power |
J117 |
Floppy drive power |
J111 |
External battery |
J118 |
Floppy drive power |
J112 |
Keylock |
J119 |
Monitor power |
J113 |
Proprietary system memory card |
S1 |
Speaker |
J115 |
USER CONFIGURABLE SETTINGS | |||
Function |
Switch |
Position | |
» |
Fail-safe timer enabled |
SW1/1 |
On |
Fail-safe timer disabled |
SW1/1 |
Off | |
» |
NPU enabled |
SW1/2 |
On |
NPU disabled |
SW1/2 |
Off | |
» |
80287 type select 4MHz |
SW1/3 |
On |
80287 type select 8MHz |
SW1/3 |
Off | |
» |
CPU speed at boot automatic |
SW1/4 |
On |
» |
CPU speed at boot high |
SW1/4 |
Off |
» |
Factory configured - do not alter |
SW1/5 |
Off |
» |
Monitor type select dual-mode/color |
SW1/6 |
On |
Monitor type select monochrome other than Compaq |
SW1/6 |
Off | |
» |
NPU type select 80287 |
SW1/7 |
On |
NPU type select 80387 |
SW1/7 |
Off | |
» |
Factory configured - do not alter |
SW1/8 |
On |
Note:SW1/3 has no effect if SW1/7 is configured for an 80387 NPU. |
CONNECTIONS | |
Purpose |
Location |
Proprietary external memory card |
S1 & S2 |
DRAM CONFIGURATION | ||
Size |
Bank 0 |
Bank 1 |
1MB |
(36) 41256 |
NONE |
2MB |
(36) 41256 |
(36) 41256 |
DRAM JUMPER CONFIGURATION | ||||
Size |
Base Memory |
Exp. Memory |
1MBExt. Memory |
J1 |
1MB |
256KB |
768KB |
disabled |
pins 1 & 2, 4 & 5, 7 & 8 closed |
1MB |
512KB |
512KB |
disabled |
pins 2 & 3, 4 & 5, 7 & 8 closed |
1MB |
640KB |
384KB |
disabled |
pins 2 & 3, 5 & 6, 7 & 8 closed |
2MB |
256KB |
768KB |
enabled |
pins 1 & 2, 4 & 5, 8 & 9 closed |
2MB |
512KB |
512KB |
enabled |
pins 2 & 3, 4 & 5, 8 & 9 closed |
2MB |
640KB |
384KB |
enabled |
pins 2 & 3, 5 & 6, 8 & 9 closed |
Note:Jumpers 3 & 4 and 6 & 7 should never be closed as serious damage to the system may result. |