Re: DMA 4 meg v. 8 meg

[KP <kjpmail@gmail.com>]

On May 5, 9:52 am, Linards Ticmanis <ticma...@gmx.de> wrote:
> On 05/05/2011 01:52 PM, KP wrote:
>
> > I have an AE Z80+ card installed, and it works fine at the moment
> > (with 1 meg motherboard RAM and 4 meg expansion card RAM).  Should I
> > be at all concerned about what would/could happen (such as, could it
> > destroy the Z80+ card or cause it to not function?) if I installed an
> > 8 meg expansion RAM card?
>
> Of course I can't give any guarantees, but I wouldn't think so. Most Z80
> cards (in fact all that I know of) access only the motherboard RAM and
> maybe the //e compatible Aux RAM, which on the IIgs is also on the
> motherboard; remember CP/M is at heart an OS for machines up to 64KB, it
> can't make any really good use of anything much beyond that, except
> maybe as a RAM disk.
>
> Physical destruction of anything by a DMA failure is pretty unlikely
> IMHO. In the worst case it'll fail with flying colors (i.e. the failure
> will be totally obvious, such as failure to start up, or failure to boot
> CP/M), but most probably it'll just work.
>
> --
> Linards Ticmanis

Thank you.

Is the CFFA fully compatible with an 8 meg Sirius card?

Is there any reason to anticipate that the CFFA3000 might not (for any
reason) be fully compatible with an 8 meg Sirius card?