Commentary by cpressey on Retrocomputing works
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### How to Build a Working Digital Computer

A classic about building a computer with paperclips.


### How to Design, Build, & Program Your Own Working Computer System

Describes the design of a computer called SCAMP:Y.  Introduces the concept
"CROM" (Changeable Read-Only Memory), which is a circuit board full of diodes
(which is changeable because you can desolder and resolder the diodes to change
the data that is "stored" in it.)


### Microprocessor Programming for Computer Hobbyists

Older computer science book, addressing machine-level programming with
a sort-of high level language called PL/M, which resembles PL/I.  Really
not bad.


### Did Forth\'s inventor Charles Moore really write a CAD program in only 5 lines of code?


### PCE - PC Emulator

While it is called just "PC Emulator", it actually emulates 4 computers: Atari ST,
IBM PC 5150/5160, Macintosh 128K/512k/512ke/Plus/SE/Classic, and Regnecentralen RC759 Piccoline.


### aappleby/metroboy: A repository of gate-level simulators and tools for the original Game Boy.