Current driver has black screen, but it isn't an error, it's just the way it is (i.e. doesn't show jack if everything is ok).
Matsushita MyBrain 3000 (the last one at this run)
Annoying video system, it has 8xn charset maps directly hooked in VRAM framebuffer and some logic vregs. I really would like to see a proper floppy image that runs on this one ...