TTL homebrew CPUs

[Jos Dreesen / Marian Capel]

> Questions: have any others on here done stuff like this, or have any 
> pointers to good resources? I'm learning as I go along here, flicking 
> through technical manuals for 8-bit CPUs etc. and gleaning what I can 
> from the web.


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

					Jos