Lots of retro people like later versions of CP/M... but, for me, 2.2 is THE classic.... much hacking pleasure in the olden days.

When I was first fiddling around with alternative CCPs I wrote a couple of utilities GETCCP and PUTCCP which read/write the CCP to the boot tracks from a specified file. (I also wrote GET/PUT BDOS and BIOS as well to complete the set.)

Very helpful. I'd never heard of ZTRAN4

ztran sounds ACE... I always hated 8080 mnemonics. A nice Z80 assembler on CP/M sounds like a childhood dream come true.... do you have syntax highlighting on CP/M too????

Any chance you could make a video or provide resources for assembly programming with the Z80 playground? Additionally, info on usage of the I/O headers on the computer would be fantastic. Additionally, documentation of the CORE functions would be awesome. If you're willing, the source code would of course be the most helpful. I have managed to use CP/M to load a basic program I wrote in asm to blink the user LED, which is a good start, but of course I'd like to do much more. Having fun with it so far though. Thanks! EDIT: Just saw your comments on waiting to release the code; totally understandable, I can relate! :) Looking forward to all of this!

I've not played with the Z80 yet, but plan to as soon as I finish up my breadboard 6502 computer. I was wondering though, do you know if there' an OS for the 6502 equivalent to CP/M? It seems everyone has their own little monitor program, but no standard OS seems to be prevalent.

Upgrade the CCP??? 🤨

Any plan to go to CP/M 3.0?