Imlac PDS-1 success!

[Tom Jennings]

On Thu, 6 Jan 2005, Bob Shannon wrote:

> After some power supply work, and several weeks of evenings of soldering 
> small caps to the boards
> to tame the logic supplies the machine was able to run hand-toggled programs 
> on the main CPU.

Now that's debugging!

> I discovered that the bootstrap 
> loader was having
> problems with the 4K address boundry, and indirect address transfers were not 
> correctly setting
> the high order memory address bit.

Indirect addressing -- when instruction sets were interesting!

Congratulations!