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Old 10-18-2007, 08:29 PM
Geoff Harrison Geoff Harrison is offline
Senior Member
Join Date: Feb 2007
Posts: 104

Looking at those pictures of Erik's, it seems that machine has had several mods made at some time in its history, all of them were backed out except the one involving IC99. Someone has cut (and restored) traces and connected wires to IC pins that involve states that seek instructions and update the P register, plus some others that involve the K (data lamp) register. It's all quite tantalizing.

Fortunately, unless there are some other cut traces that I missed, all those mods have been restored.
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