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Re: First disk image of PLATO courseware for Apple II now available
On 10 juil, 18:15, A2CPM <a...@wilserv.com> wrote:
> Hi!
>
> On Jul 10, 11:08 am, N.N. Thayer wrote:
> <--- snip --->> The disk uses a modified DOS 3.3 where:
> > - header markers were D5 AA 96 / FF FF instead of D5 AA 96 / DE AA
> > - data markers were D5 AA AD / FF FF instead of D5 AA AD / FF FF
> > - sync bits were changed from FF to AB
> > - nibble translation table was also changed: first entry value $96 was
> > changed to $AA
>
> <--- snip --->
>
> Do we have a typo here? The before and after data markers appear
> to be the same...
>
> Willi
Yes, we have, thanks for that.
Please read: "- data markers were D5 AA AD / FF FF instead of D5 AA
AD / DE AA"
av