A BIOS and build scripts for installing CP/M 2.2 on an SD card for the Z80 Retro! board.
Since incorporating the use of submodules, the process of 'getting everything' requires a command that will recursively download all of the parts like this:
git clone --recurse-submodules https://github.com/Z80-Retro/2063-Z80-cpm.git
or, if you use ssh (useful if you want to push changes to a repo to make a pull request):
git clone --recurse-submodules git@github.com:Z80-Retro/2063-Z80-cpm.git
A discussion of how to partition an SD card for the Retro! board can be found in ./README-SD.md
Be sure to also read the details on how to install filesystems onto your SD card.
See the code in ./hello to create a program that will load and run from the SD card.
After the clarification of the Digital Research Inc. license in 2022 on the use and distribution of CP/M, all of the files needed to build and run CP/M on the Retro have been made available on github in the Z80-Retro/cpm-2.2 repo.
The CP/M source, utilities, and manuals were collected from the The Unofficial CP/M Web site in 2023:
- source code of various CP/M releases:
- I used the link that says: CP/M 2,2 ASM SOURCE code
- Application program binaries that can run on the Retro!
- I used the link that says: CP/M 2.2 BINARY distribution disk for the Xerox 1800 system
See ./retro for details on assembling and installing CP/M onto an SD card.
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Individual manual booklets (for the purists):
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The PC parallel printer interface port pinout and signal meanings
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The Humongous CP/M Software Archives
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Good stuff from someone writing a BIOS for a retro project with a nice story about what can happen if you don't carefully read the Alteration Guide first!
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A discussion of CP/M internal basics
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A simulator that looks impressive: