What's New:
32x: handle sh2 illegalSlot instructions
fm2612: revive old-fast-buggy implementation, use it for mcd32x
helios: mcd32x support for DoomFusion
helios: support ExtInterrupt enable, refactor vdp interrupts
helios: fix saving state to file
helios: show fps icon, resize icons
helios: Nuked-OPN2 as an external lib
mcd: sub68k has a working TAS instruction
mcd32x: fix bug in 32x homebrew bios
md: vdp h40 switching, undocumented
z80: change pc range for md