I remember reading (at the time when it was current) in a hobbyist magazine about a ZX Spectrum modification to map RAM into ROM (not unusual), and implementing CP/M for it. The author ended the article with the sentence (approximately) "And now you can use CP/M (the cassette tape version) and its rich amount of software, but of course, you will use it up to its full potential if you invest into a floppy drive".
The question is: was there a (home) CP/M variant using cassette tapes, was it in any way standardized (even if unofficially), and how widespread was it?
Unfortunately, I do not remember which computer was provided as an example of "widespread use of existing CP/M floppyless variant", perhaps Sharp MZ-700?.
PUN:
andRDR:
devices), and not the simple tape drive technologies home computers used.