if you can operate fmsx-dos, I don't see why you'd have problems with meisei's .cas emulation...
But it would be better to use a modified the Meisei is permission to re-save the BASIC / BLOAD the file TAP , is saved on several occasions but not overwrite another file that lies ahead in the file. TAP emulator.
Bye bye
For security, you can only save files to free blocks. If you want to overwrite an old block: insert a free block, save the file there, and remove the old block.
This emulator meisei is not valid to make work only the programs for BASIC and BLOADable.
Is resolved the problem with BLueMSX, olther emulator.
The meisei is not secury the 100% on BASIC to save TO TAPE.
bye bye
A good feature for developers (at least for me) would be to have a viewer/editor of RAM/VRAM
nanochess: for that, use blueMSX and openMSX (with openMSX debugger).