Electronics > Projects, Designs, and Technical Stuff

Whats the smallest computer you could make?

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joeqsmith:
Without peripherals, an FPGA and PROM. 

eugenenine:
6502, rom, ram and a handful of support components.
http://www.sunrise-ev.com/6502.htm

RES:
1-bit cpu i.e. Motorola MC14500B DIP16.

https://en.wikipedia.org/wiki/1-bit_architecture
https://en.wikipedia.org/wiki/Motorola_MC14500B
https://m.eet.com/media/1122084/0112esdganssle01.png

ChristofferB:
One chip - Motorola 6801/6805.
Basically a 6800 with a sprinkle of ram (I think 128 bytes) and a mask rom in the same package. Still not a microcontroller! Still had Von Neumann-architecture.

I believe they made them with a piggyback eprom soctet on top for the romantic,  too.

TomS_:
You could build a minimal Z80 computer with "about 6" chips:

* CPU
* ROM
* RAM
* 1-2 glue logic
* PIO and/or SIO for some I/O

The address space would be very coarsely segmented, but that is a price you pay for minimalism. Add an oscillator, and a few resistors and capacitors here and there as required.

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