I would like to use this external device expansion BUS_PORT as it is called in the various manuals that I have for the MC68HC11. The problem is, I can't find any hard data on how to do so! My most pressing question is, do I need to set the direction of the data pins (D0-7) everytime before I write to my address block, and if so, how/where?
Do I need to use the R/W pin that's on that bus? (if so, how?) And, if I write all my addresses for my external device to the same CS' address block, is the CS' going to pulse every time I change address? Anybody found an AppNote on this, because I sure didn't and it wasn't for lack of trying.....TJ