Nov 1977 Byte Mag, has "Build a computer from scratch".
It is a 8 bitter, 4 instructions In,Add,Store(negitive),Jump if Postitive.
Ben.

https://archive.org/details/byte-magazine-1977-11/page/n78/mode/1up

It is a very minimal instruction set, but neatly tackles the bootstrap problem with its WIO instruction.

Although entering a program by this method would be a little tedious, it seems good enough for entering a small secondary bootstrap.

It is very similar to the method used in the CARDIAC paper computer.
https://www.cs.drexel.edu/~bls96/museum/cardiac.html

I've a feeling the 1802 similarly supports a front panel bootstrap

Nice to see a bit of home-built TTL computing history.

However it had a chip-count of 35 ICs, of which 8 were the RAM.

The instruction set was very minimal - leaving a lot of scope for future improvements.

I would have thought that using a pair of 74181s as the ALU would have encouraged a more diverse instruction set.

In the author's defense - it was his first electronic project, and he learnt a lot about TTL design from the exercise - and he got an article published in BYTE !

Dr Jefyll’s MISC gets another mention on Hackaday.
https://hackaday.com/2021/03/31/one-bit-cpu-runs-at-a-blistering-60hz/

Turing Machine's while not practical, could also be considered one, depending on you view the state table
and tape memory. They also look nice in mechanical form.
Wooden
https://hackaday.com/2018/03/08/mechani ... g-machine/
https://www.youtube.com/watch?v=vo8izCKHiF0
Taditional
https://www.youtube.com/watch?v=E3keLeMwfHY

Thanks for that, B.Bibby. Sorry I've been slow to notice your post. I need to visit Anycpu.org more often!

Also belonging on the MISC list are three offerings from Myron Plichota:

Bugs18 Forth CPU
A 12-bit lab computer for the Lattice iCEstick
Enhanced Tiger Single Board Computer

-- Jeff