On Jan 14, 2012, at 3:56 AM, Wouter de Waal wrote: True, and people certainly do that with Defender boards a lot. At least in the case of Defender, it does require an adaptor, though. In an Apple II, you could at least make an adaptor to use all of the chip (if you wanted, it's probably more trouble than it's worth), but in Defender, it actually reads out of all three banks simultaneously for the video shift register load, so there'd definitely be a waste of RAM. A 41464, though, could cut down significantly on the number of chips. Anyway, there's lots of options, but it's kinda nice to have an original-looking board (well, as original as it came, anyway; someone modified the battery holder on one of them to be a CR2032 holder, which is pragmatic if nothing else). - Dave