Links

This is just a collection of links to pages that I've found useful in this project so far

YouTube:

Obviously, Ben Eater's 8-bit computer series, the original inspiration for this project.
James Sharman's Pipelined 8-bit computer series. Lots of interesting info on how he's gone about building a much more complicated computer, including pipelining. Currently a mix of PCBs and breadboards.
Robert Baruch's Let's make a RISC-V processor series, an ongoing(?) series in which he builds a full RISC-V implementation on PCBs (no FPGAs involved).

Reddit:

Other links:

Magic-1. This was the first homebrew CPU I've seen that had gone as far as being able to run Minix
Dieter Muller's set of articles on building an ALU from multiplexers. This is the approach I took for my breadboard ALU.
Kicad Replicate layout plugin. Very useful when you have repetitive layouts (register board, I'm looking at you)
A useful page on add-with-carry and sub-with-borrow implementations of ALUs

Assembly, microcode etc:

CustomASM, an assembler that lets you specify your own instruction set. Missing a few features that would be useful in larger projects, but excellent for tinkering with small programs
A very helpful post on porting LCC to a 16-bit MIPS-like architecture
An example of a machine description file for the LCC compiler

LLVM:

CPU0 LLVM backend, a very detailed walkthrough of building a custom LLVM backend for a 32-bit MIPS-like system