Re: DMA 4 meg v. 8 meg

[schmidtd <schmidtd@my-deja.com>]

On May 6, 11:05 am, KP <kjpm...@gmail.com> wrote:
> On May 6, 11:01 am, schmidtd <schmi...@my-deja.com> wrote:
> > On May 6, 10:49 am, KP <kjpm...@gmail.com> wrote:
>
> > > If you have a physical card in some of the slots, could you override
> > > recognition of that card and use the slot as a virtual slot for the
> > > CFFA3K?
>
> > The CFFA3k will insert virtual ROM in the slot you tell it to.  So, if
> > your card already has ROM in that space, they'll collide.
>
> > > For example, if I have a Z80 card in Slot 4 but I want (for some
> > > reason) to mount a disk image from the CFFA3K in Slot 4, do I have to
> > > physically remove the Z80 card, or can the Apple be told to ignore the
> > > physical card and recognize the virtual card?
>
> > In the GS through the control panel, you can configure a slot to
> > either behave with the internal definition or instead to obey what's
> > plugged into it.  In order to get the CFFA3k's virtual Disk II slot
> > working, you have to set that slot to "your card" so the ROM can be
> > inserted in that memory space.  If there's a physical card in that
> > slot already, it wouldn't work.  So I think the short answer to your
> > question is, "no."
>
> > But it's endlessly configurable... you can set the CFFA3k to emulate
> > the Disk II in the slot that the '3k is already occupying, too.  It'll
> > disable the SmartPort drive capability, but it's possible.
>
> So if I have empty slots 5 (except for the smartport 3.5" drive), 6
> (except for the smartport 5.25" drive), and the CFFA3K is in 7, then
> that should be more than adequate?

More than adequate.  Keep in mind there are four possible things at
work here, and three useable slots - you only get to use three.  You
lose one of the four.  You pick which one.
Slot 5: physical 3-1/2" disk drive or the phantom Disk II
Slot 6: physical 5-1/4" disk drive or the phantom Disk II
Slot 7: CFFA3k SmartPort or the phantom Disk II
In no case can you have both in a slot at once.