Originally Posted By Kale
r6242 /src/mess/drivers/act.c: [Apricot Xi]: Emulated basic video HW

Now this is odd: MC6845 sets 640x375, tilemap size is 80x25 and charset is 10x16...obviously, 80x10=800, so right-most columns gets cutted and I don't have any hell of an idea about it.
And...before you ask, no, start address is equal to 0 smirk

Well, the size on a real Xi is 800x400 (80x10=800, 25x16=400) so I don't know where the 640x375 comes from. Is something assuming a character cell is 8 pixels wide and 15 high?