Commentary by Chris Pressey =========================== This work is distributed under a CC-BY-ND-4.0 license, with the following explicit exception: the ratings may be freely used for any purpose with no limitations. Retrocomputing -------------- ### How to Build a Working Digital Computer * rating: classic A classic about building a computer with paperclips. ### How to Design, Build, & Program Your Own Working Computer System * rating: 1 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 * rating: 3 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. ### history - Did Forth\'s inventor Charles Moore really write a CAD program in only 5 lines of code? - Retrocomputing Stack Exchange * rating: 1 . ### PCE - PC Emulator * rating: 1 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. * rating: 1 .