[Coco] MAME FDC Issue that can cause corruption

[David Ladd]

Barry,

The only bug report I have filed was in relation to OS-9 L2/NitrOS-9 L2 and
coco3/coco3h thus far:
http://mametesters.org/view.php?id=6639

I need to make videos and also show that I can also re-produce this in the
coco12.cpp branch as well.

I do not know how to use the Dragon part of the emulation so would be
interested to see if the Dragon uses the same FDC driver base and if so if
the problem is also re-producible there as well.

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On Tue, Aug 1, 2017 at 3:30 AM, Barry Nelson <barry.nelson at amobiledevice.com
> wrote:

> I have confirmed this issue on my Macintosh build of MAME as of version
> 0.186 and later. David, have you filed a bug report?
>
> > David Ladd davidwladd at gmail.com  <mailto:coco%40maltedmedia.com
> ?Subject=Re%3A%20%5BCoco%5D%20%5BCOCO%5D%20MAME%20FDC%
> 20Issue%20that%20can%20cause%20corruption&In-Reply-To=%
> 3CCAHW2jkD0ehDiQ7H--G5TxgskT4X3pWxnUuy-XEtkdOd56gMY1Q%40mail.gmail.com%3E>
> > Tue Aug 1 01:50:32 EDT 2017
> >
> > If you want to try it out the simplest way to show this off is to do
> this:
> > Startup CoCo 2 or CoCo3 emulation
> > Create a new disk image in drive 0
> > Create a new disk image in drive 1
> > DSKINI 0
> > DSKINI 1
> > Enter a quick basic program like this and save it to disk:
> > 10 PRINT "DIR 0"
> > 20 DIR 0
> > 30 PRINT "DIR 1"
> > 40 DIR 1
> > 50 GOTO 10
> > SAVE"TEST1.BAS"
> >
> > Then all you have to do to see the problem is to:
> > DIR 0:DIR 1
>
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