I'd like to be use the Tasword 2 text editor for the ZX Spectrum to load and save text files on an SD card. Gary Lancaster provides a version of Tasword that uses Residos system calls, but as far as I know it's hard to get residos to work with FAT32 formatted partitions. Also, I only have a DivMMC device that has Esxdos on it.
The Tasword user manual has a section on how to customise the program to use it with microdrives and mentions it can also be customised for other disk interfaces, but I don't know how to start with this process to make it work with Esxdos.
Maybe someone has done this customisation already and could share their code?