I have a fix idea to build myself an 8080 CPU. Preferably only by using discrete components.

Picture below shows the ALU (some assembly required) in the front pile of circuit boards. The smaller pile of boards in the upper right are parts for the REGISTERS  (you know:  BC, DE, HL, PC, SP and WZ and so on).

Homebuilt CPUs WebRing

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To join the Homebuilt CPUs ring, drop Warren a line, mentioning your page's URL. He'll then add it to the list.
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Note: The ring is chartered for projects that include a home-built CPU. It can emulate a commercial part, that′s OK.
But actually using that commercial CPU doesn′t rate. Likewise, the project must have been at least partially built: pure paper designs don′t rate either.
It can be built using any technology you like, from relays to FPGAs.