Part 1. This is Compaq's first desktop computer released in June 1984, two years after their highly successful and 100% IBM PC compatible Compaq Portable. It borrowed the trick dual mode monitor and graphics card from the Portable and offer a lot more expandability. In this video, we'll start the process of diagnosing and testing the computer. Let's install a XTIDE card in the machine and see what it can do. I also figure out how to control the CPU speed and keyclick function from DOS.

Toggle CPU speed: CTRLALT\ (power LED changes color)
Control key click: CTRLALT+ and CTRLALTMINUS (use the numeric keypad)
Change between high and low red video mode: CTRLALT'LESSTHAN' and CTRLALT'GREATERTHAN'

Part 2:    • Compaq Deskpro Part 2: More explorati...  
Part 3:    • Compaq Deskpro Part 3: Fixing that 40...  
Part 4:    • Compaq Deskpro Part 4: The home stret...  

Apple IIc repair video:    • What's keeping this Apple IIc from wo...  

Links:
Commodore Computer Club
https://www.commodorecomputerclub.com/

Free VI For DOS:
https://vetusware.com/download/Free%2...

Compaq Speed Control Scripts and tools:
https://vetusware.com/download/Compaq...

CGA Compatibility Tester:
https://github.com/MobyGamer/CGACompa...

Speed Test v0.99:
https://vetusware.com/download/Landma...

Checkit v3:
https://winworldpc.com/product/checki...

IMD:
http://www.classiccmp.org/dunfield/im...

Free VI For DOS:
https://vetusware.com/download/Free%2...