Re: How much of a ][ is needed to twitch?

["mdj" <mdj.mdj@gmail.com>]

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.

> >>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.

Matt