How scarce (valuable) is core for the PDP-8?

From: CLASSICCMP_at_trailing-edge.com <(CLASSICCMP_at_trailing-edge.com)>
Date: Thu Apr 22 08:07:06 1999

>> take about 90VDC to light up, but after they light up they'll stay on
>> until the voltage drops below 60VDC or so. Only problems are:
>>
>> 1. The thresholds can vary greatly from unit to unit.
>>
>> 2. The thresholds will vary depending on ambient light, as well.

>Use pulse coupleing so each runs at it's range. Also I do have a basic
>design for a TTT machine using neons and 2d21 thyratrons.
>I feel personally that would be good for demonstrating some for the other
>forms of logic used.

Absolutely - a lot about logic, especially pulse-coupled logic, is there
to be learned.

>Then again someone would want that interfaced to PCI too.

Hmm - there's enough loopholes in the PCI spec already, maybe we
can sneak 90V logic levels in? :-).

Tim.
Received on Thu Apr 22 1999 - 08:07:06 BST

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