Also how come MAME doesn't support Nec Pc-8001MkII Cassette Tape?
I used PC-8001 base to rewrite selected parts of PC-8801 emulation that lead to the promotion of latter one year ago. For doing that I ignored the cassette device part because it's not my area of expertise plus by now I even forgot how to load one with that BASIC flavour:
I think?
It otherwise
can load floppy images thru PC-8001mkII.
I also eventually have to look at its CP/M flavour because I necessarily need that for PC-8401 Telnet serial comms.
It's all
horribly linked in one way or another, particularly with NEC designs.