Re: Ultima Apple Emulation

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

On Jan 19, 10:30 am, Andy McFadden <fad...@fadden.com> wrote:
> In comp.sys.apple2 e...@neilsonhart.com wrote:
> > I believe a straight Nibble copy will get you pristine backups of
> > Ultima I-IV.
>
> IIRC, Ultima I just used altered address / data fields, but Ultima II
> added some sort of secondary check (nibble count?) which .nib won't handle.
>
> > As far as I know, no other emulator supports the .v2d format which is
> > a shame because it's an open standard.
>
> Where is this open standard published?  Google didn't turn up much, but
> perhaps I was searching for the wrong things.  I'm curious to see how
> different sync-byte widths are represented.  (I'd also like to see an
> uncracked "spiradisc" Frogger image boot.)
The client end is part of ADT at berlios, implemented by Eric:
http://svn.berlios.de/wsvn/adt/adt/trunk/target/sscgs/src/adt.s
It does nibble and half-track sends.  The A2V2 server (part of Gerard
Putter's Virtual ][ emulator) is the only code that will interpret the
stream so far.  I have nascent support in the ADTPro server, but
couldn't get things to work well enough to keep me motivated to get it
ready to release.  In my limited testing, I had a hard time getting
nibble copies of unprotected disks to work with any regularity; and
some nibble copies of protected disks would work in Virtual ][, but
not in AppleWin.