might be able to get hold of the bios, but I'm
worried about the 3rd
Remember the BIOS might have been specifically modified for that
machine. Things like internal/external video selection are not going
to be in a generic desktop mchine BIOS
EPROM. It sits in the middle of a bunch of Yamaha
branded chips. The BIOS
That may well be the display character generator. In which case if it contains
_something_ you will get a display.
-tony