mdj wrote:
On Feb 13, 4:46 am, "Michael J. Mahon" <mjma...@aol.com> wrote:I tested my "secret" project today. It didn't work. When I start seeing results / make it look less pathetic / pose less danger to people's precious hardware I'll reveal more. Or I guess if I'm asked nicely.Pretty please...with chocolate fudge and sprinkles on top... ;-)You might have more luck with a beer, or a lamington.
Yep, I figured my request could use "localization". ;-)
I really should have said "main board ROM", since that's the address space that a RAM card maps to. It is possible for a slot card to disable all main board address decoding, and so take over for main board ROM *and* RAM, but I'm not aware of any manufactured cards that do so. This would be the only way to get page zero, etc., mapped to a slot card.Shame. Such a card would be very useful.I misspoke. ;-( A slot card can take over ROM space ($D000..$FFFF), but it cannot take over RAM space using slot signals.This is true of the original II only - on the IIe and IIgs /INH overrides the entire address space.
Which is what I was thinking about--but his is a ][. -michael NadaNet networking for Apple II computers! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."