Someone is interested to support the cassette (tape recorder function) for the Hitachi Basic Master series (bmjr/bml3)?
If yes, I will upload some stuff.

PS: At moment, a not working cassette slot (MESS) is available.

I translated (Japanese to English) the GUI of the eMB-688X + eMB-689X emulators which are no more available on internet.
Also I translated the GUI of the L3 (Level3) emulator which was a commercial (?) product (registration needed).
Special thanks goes to:
the developer of the L3 emulator for the L3/S1 registration code for free.
the developer of the BM2 emulator for the new German keyboard/Amber monitor mode support.
the developer of the Hitachi Basic Master Level3 Mark5 (bml3mk5) emulator for some help.