On Mon, 22 Mar 1999, Marco Antonio Simon dal Poz wrote:
> On Mon, 22 Mar 1999, shevek wrote:
>
> > On Mon, 22 Mar 1999, Marco Antonio Simon dal Poz wrote:
> >
> > > For the most part of diskroms, DMA can be in page 1, because they have
> > > access to FDC through addresses 7FF8h-7FFCh and also BFF8h-BFFCh, and they
> > > transfer a small routine to F1BFh (or something like that) that allows a
> > > disk transfer to happen in page 1.
> >
> > Is that MSX-standard or just the case on many MSXs?
>
> The standard doesn't say anything about the method that the diskrom should
> use. So, it's just the case on many MSXs. The standard only says that the
> interface should use memory addresses to transfer data between CPU and
> FDC.
Ok, but this means that using DMA in page 1 is against MSX standard, or
not?
Bye,
shevek
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