Yesterday I found a scan of the PDP-11/40 Processor Handbook, and printed it out. It is amazing how close my ideas are compared to the 1972 real PDP-11 machine. Now I'm really tempted to try and make a PDP-11, but I have to tell myself to learn to walk first. Remember that DEC started with the PDP-1 first before they got to the PDP-11!
Two things jump out; the PDP-11 had memory mapped registers, and any memory location could be used as an accumulator (albeit indirectly). I'm going to go through the manual, and pick out the cool bits. I guess create the PPDP-1 (Paul's PDP-1).
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