Computer Sanctuary
Compaq Portable Computer
  System Configuration
Name - Compaq Portable PC
Model - 101709
CPU - Intel 8088 4.77Mhz
Memory - 640Kb
Hard Disk - 20mb Hard Disk on a card
Floppy Drive - Two 360k 5.25" full height drives
Display - Built in monochrome CRT (Green on Black)
OS - Compaq Personal Computer DOS Version 3.31
Born On - 1985
Cost New - Over $3000.00
My Cost - Free
  Compaq Portable PC Model 101709

   I acquired this computer several years ago before it made it to the dump. Not only was this the first computer manufactured by Compaq, it was also the first IBM PC clone that didn't infringe on any copyright laws. Clone meaning that this Compaq PC was 100% compatible with software written for the IBM PC. The only thing that was really unique about the IBM PC was it's BIOS (Basic Input/Output System). The BIOS is the underlying embedded software that controls how the components of the pc interact with each other. How did compaq build this computer and make it 100% compatible with IBM's machine without copying IBM's BIOS? They hired some programmers to reverse engineer IBM's BIOS and learn everything that it did. These programmers then went to another group of programmers that have never looked at the IBM BIOS. The other programmers were asked to write some software that is capable of performing all the functions of the IBM BIOS without knowing how IBM done it. The end result was a new BIOS that had the same functionality of the IBM BIOS written differently.

   Enough history, lets check out this machine. Below are some photos showing the external details of this unit. Click on an image to see a larger version.
  External Photos
   Designed like a suitcase this luggable computer weighs in according to my scale at 35.5 lbs. Sitting upright it stands 15.5" tall, 19.5" wide at the base, and 8.5" thick. Not quite a laptop but, impressive for it's time. I plugged it in a powered it up. Exactly 1 minute and 14 seconds later I was sitting at the command prompt. Unlike the IBM PC, the Compaq did not display the progress of POST memory test. Just a blank screen with a lonely cursor flashing in the top left corner. After nosing around the drive for a little while I found that a lot of the original software is still on the machine. I found the diagnostics software, a demo showing the features/capabilities, and a few games. According to the diagnostic software the Compaq is fully operational. COMPAQ Personal Computer DOS Version 3.31
  Running Diags
Compaq Portable Computer
Click To Enlarge
   Sifting through the DOS directory I found The Compaq Personal Diagnostics program. This program went through and checked the functionality of the computer's components. It checked the memory, system board, display, floppy drives, hard disk which took forever to complete, serial communications, and the printer port if you had a printer hooked to it. According to the test this computer is fully functional.

  System Information
Compaq Portable Computer
Click To Enlarge
   System Information... This program reveals how this computer is configured. It says this computer has 640Kb Ram, 2 floppy drives, 1 hard disk, 1 printer port, 1 serial port, and than no game adapter is present.

  Shall We Play A Game?
Compaq Portable Computer
Click To Enlarge

Compaq Portable Computer
Click To Enlarge

Compaq Portable Computer
Click To Enlarge
   A nifty little Compaq Portable game, "The Most Computers You Can Carry." The object of the game is to pick up as many Compaq Portable's that you can in 60 seconds. Compaq portables are located in each corner of the screen. To pick up a portable simply move the man over the computer using the cursor keys. I gave it a try to see just how many of these things I could carry around. The game was laid out like a grid in which you maneuver a character through to get to its destination... The Compaq Portable. To make the game more challenging the walls of the grid randomaly appeared and disappeared. Sometimes walls appeared which blocked your path requiring you to seek a different route. Other times walls disappeared allowing you pass. When the 60 seconds timed out I had managed to grab 4 Compaq Portables. Which according to the game, gave me a rating of AVERAGE and asked if I was too tired. At 35.5 pounds apiece I don't think I did too bad to carry 4 of them.

  A Demonstration of Capabilities
Compaq Portable Computer
Click To Enlarge

Compaq Portable Computer
Click To Enlarge
   A program using graphics to illustrate the capabilities of this Compaq Portable. For the time period this was build I found it to be quite impressive. The graphics ran quite smooth.

  Remember To Park Your Hard Disk
Compaq Portable Computer
Click To Enlarge
   Something that I had almost forgot... If it were not for the reminder someone taped at the bottom of the screen, I would not have remembered to park the hard disk. In the old days it was highly recommended that you park your hard disk before moving your computer. When old hard drives were powered down the heads remained wherever were. If the drive was bumped a bit hard the heads could bounce and make contact with the disk possibly destroying data. This was known as crashing your hard drive. The solution was to move the heads to the innermost track which was set aside as the parking zone. No data was ever written to the parking zone therefore no data could get damaged if the heads crashed into it. The parking of the heads was usually done by a utility program that you ran just before powering down the computer. In this case the utility was called shipdisk. Modern drives sense when the power is going down and automatically park the heads.
Removing the skin    Checking the luggage... Removal of the top cover was surprisingly simple. Just pry it off. The cover is held in place by some plastic tabs which are molded onto it. On the inside of the cover was a date stamp October 26, 1985. Under the cover I found more covers. Metal ones held in place by screws with... (Drum Roll) T-10 Torx heads! Not the combination slotted/Torx ones found in the numerous other Compaqs I've had apart. To gain access to the cards I only need to remove the back cover next to the box for storing the power cord. Note... The cover is slotted so that it will slide off with the screws loosened. Of course I figured this out after I had removed the screws.

   Inside I found this machine to have 5 ISA slots and 4 cards installed.

  Internal Cards
Slot 1 - Floppy controller card with parallel port.
Slot 2 - Mono video card (VDU Controller Board 1984) The built in monitor is plugged into a jack on the card. There is also a db9 connector on the cards plate for an external monitor and a RCA jack I assume to be a composite out for a television
Slot 3 - A Hard Drive on a Card. I haven't seen one of these in ages. It's a 20mb drive card made by Mountain. Model DCD-10/20. Original? Don't Know. It's dated 12-1985.
Slot 4 - No card, only dust bunnies.
Slot 5 - A DATEC PAL modem card with 25pin serial port.
Four 8bit ISA Cards
  Photos Of Cards


Return To The Computer Sanctuary


Photos, Descriptions, Website Design Copyright © 2005-2008
Your Friendly Neighborhood Junk Collector
Do not use without permission