On 26/06/2013 2:13 AM, Bill wrote: > or there is something wrong with the old, > modified Coco1 that I have. Well for starters this will only work on a Coco 3... it's switching the ROMs in and out with the $FFDE/$FFDF writes... Regards, -- | Mark McDougall | "Electrical Engineers do it | <http://members.iinet.net.au/~msmcdoug> | with less resistance!"