zxmmcfid
A ZXMMC mass storage device FID driver for CP/M
...Although ZXMMC device is available on the market for years and it works well with +3e firmware, partitions created on MMC cards could not be accessed from CP/M world. At some point it became so frustrating, I decided to write FID driver for it. It's not perfect, but it works surprisingly well.
For list of limitations, build instructions and more details see the source code file.