Kitten 1: Cpu

This is a 24/12 bit cpu in the style of the computers of 1980's. Still sourcing parts
but some day I will have a bunch playfull 2901's computing for me. A real PC clone
in speed and use of XT edge connectors on 8 x 10 PCB's. 256KB of 12 bit memory.

Front panel  memory address - 6 DIGITS
Front panel -data bus  4 DIGITS

Format
MODE:OP :AC : IX                   OPR/R+/SCC/PSH
MODE:OP :AC :}##                  QUICK
MODE:OP :AC :}##:###:###:###:###  BCC
MODE:OP :OP :IX :###:###:###:###   INDEXED

SCC/BCC AC=0 Invert logic sense.
Cycles
Quick/Operate  2      rfsh fetch)
Immedate,R+*   3/4  {store},rfsh mem mem fetch
Indexed              4/5  fetch rfsh mem {mem} fetch
Bcc                     3
Jump                  5
Jsr                      7   

Still Under Construction - June,2008.
News flash ... Real PCB/Schematic CAD program now on the computer.
More news ... using a 64 macro cell CPLD to generate the raw control logic
rather than 4 - 512 x 8 proms... Still lots of LS needed still.
On hold Oct 2008, now developing a 9/18 bit cpu.

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