Both MSX and PCengine CD games do not work on retroarch, just results in a black screen, I do have the PCECD bios and I'm trying to run rondo of blood and I'm trying to run a PAL copy of Metal Gear but theres nothing though just the game
msx and pcecd work perfectly, you need the bios. The Rondo of Blood works fine, japanese patched to english.
I've had some trouble loading bin games on the recent nightlies if I'm not already running the right core. Try loading whatever PCE core first. And yeah I have Rondo working.