Imlac PDS-1 success!

From: Tom Jennings <tomj_at_wps.com>
Date: Thu Jan 6 14:15:32 2005

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!
Received on Thu Jan 06 2005 - 14:15:32 GMT

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