On Apr 27, 2:31 am, vladitx <vlad...@nucleusys.com> wrote: > I remember the II/II+ and //e video timing was different in some small > details. It's also probable the emulator is giving the problem. The floating bus code is based on Sather's logic equations. I'm pretty sure it's correct, but do have a look if you're interested. ;-) Cheers, Nick.