6 Jul
2007
6 Jul
'07
12:12 p.m.
--- Jos Dreesen / Marian Capel <jos.mar at bluewin.ch>
wrote:
I made, in 1986, a 12 bit machine with raw TTL.
Switches as input, 4 nixies as output, ca. 120 IC's.
Parallel, with 3x181 as Alu, 3x194 as accu/shifter,
and a dedicated
hardware stack separate from the main 4Kx12 memory.
Actually building and debugging it was the hardest
part.
Go for parallel, it is easier and will not be that
more expensive in
partcount.
Let me know if you want my schematics
I'll love to see them. In general, if you are
building a rudimentary cpu, do particular part numbers
prevail? Particular families of TTL?
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