Re: How many K does a ProDOS Apple IIe of IIc floppy hold?

[tws <adoyson@nccn.net>]

Beneath Apple DOS (book) will tell you the sections of code that need to be
modified.

It sounds like only a few bytes need to be changed.

Try Ground, and Asimov for Texts about DOS 3.3

slick_RCBD@hotmail.com wrote:

> Stainless Steel Rat wrote:
> >
> > -----BEGIN PGP SIGNED MESSAGE-----
> >
> > Nathan Mates writes:
> >
> > >    Maximal capacity is 140K (35 tracks * 4K/track).
> >
> > There are several instances of a hack that will push that up to 160K.
> > Early 5.25" disk mechanisms (Shugart?) could not reliably handle more than
> > 35 tracks.  But the next generation, starting with the second or third
> > manufacturing run of the Disk ][ drives (IIRC) could handle 40.
> >
> > DOS 3.3 is hard-coded with a 35-track limit in three places; the
> > aforementioned "hacks" are nothing more than changing the value in those
> > three locations from 34 (first track is 0) to 39.
> >
> > ProDOS can handle much larger volumes, but I do not know of any similar
> > hacks for it.
> >
> > -----BEGIN PGP SIGNATURE-----
> > Version: 2.6.3a
> > Charset: noconv
> >
> > iQCVAwUBNXyPrp6VRH7BJMxHAQGl9AP/T9IrHdUKkYBIlGLzneFCXN2rJOL/mUJy
> > YwXklxM6fNcoQVQArkBHz9xv5s6FO4mWvDxNv3hlyu5hDsLrMCz+UJOASA7KG69i
> > ohttr9F7cHXKk3SR9rPVPt3e8cnBWufEa4HZQ0aMkbECGBB/TpnDlncfb0p4VMAd
> > YOJwHXoEk6w=
> > =eaC6
> > -----END PGP SIGNATURE-----
> >
> > --
> > Rat <ratinox@peorth.gweep.net>    \ Happy Fun Ball may stick to certain types
> > PGP Key: at a key server near you! \ of skin.
> >                                     \
>
> Is there some place where I could find information on this 'hack'. Perhaps I
> can use it to make a larger disk for saving games. That is all I use DOS 3.3
> for. Any practical work gets done in ProDOS or GS/OS.
>
> -----== Posted via Deja News, The Leader in Internet Discussion ==-----
> http://www.dejanews.com/   Now offering spam-free web-based newsreading