IZE80 is an ICE (https://en.wikipedia.org/wiki/In-circuit_emulation) for Z80 systems that can be used in virtually any Z80 machine that has an original 40 pin Z80 (or compatible clone). Part of my 40 ICE series along with MiCe6809 and potentially a 6502 as well.
The microSD card can hold any data you need (roms, vgms, samples) and the mini USB can be used for MIDI, firmware upgrades or other communications.
It has been tested so far in
MSX machines, ColecoVision, Sega Master System, Genesis, Pac-Man Arcade Board And various other things.