I was surprised that I couldn't seem to find this information anywhere on the Wiki, so I've created a stub article trying to summarize the things I know about how open bus behavior works:
http://wiki.nesdev.com/w/index.php/Open_bus_behavior
This is kind of an obscure area for me, so I'm asking for some proof-reading here. If anybody has corrections/revisions to make, or good references to add, etc. please do so. (If you have something to add but no wiki editing access, you can make your statement here and I'll try to incorporate it.)
http://wiki.nesdev.com/w/index.php/Open_bus_behavior
This is kind of an obscure area for me, so I'm asking for some proof-reading here. If anybody has corrections/revisions to make, or good references to add, etc. please do so. (If you have something to add but no wiki editing access, you can make your statement here and I'll try to incorporate it.)