Re: A new boot code for Alex Freed's Pseudodisk ][...

["Michael J. Mahon" <mjmahon@aol.com>]

Alex Freed wrote:
> Deckard wrote:
> > On Feb 1, 12:33 am, Alex Freed <alex_n...@mirrow.com> wrote:
> > > It doesn't have much space for extra code
> >
> > Enough for me ;-)
>
> Great job but I was talking about the DOS3.3 page - identical to the ROM 
> on the real floppy controller cards.
>
> > I've optimized the code and added a test to check if the open apple is
> > pressed and if so change the origin.
> > And the free bytes are always = 11.
> >
> > My proposal:
> > http://boutillon.free.fr/Underground/Outils/Beautiful_Boot_PD8/Txt/ALT_BOOT_MMC.txt 
> >
> >
> > I can't test it. Do you think it could work?
>
> I think it should, but one issue is that a different page of the ROM is 
> mapped in nibble mode. There should be a provision added to switch the 
> address line so as to map in the "ProDOS" page that you have optimized.
> In my design hitting reset on the Apple doesn't reset the AVR.

Does that take a wire or a diode to change?  ;-)

-michael

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