[Coco] MAME FDC Issue that can cause corruption

[Barry Nelson]

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