Re: [hatari-devel] floppy issue

[Thomas Huth <th.huth@xxxxxx>]

Am Thu, 13 Feb 2014 11:49:08 -0500
schrieb "Roger Burrows" <rfburrows@xxxxxxxxx>:

> A follow-up ...
> On 12 Feb 2014 at 22:10, Roger Burrows wrote:
> 
> > On 11 Feb 2014 at 22:21, Roger Burrows wrote:
> > > 
> > > That's all I can do on this until I get my questions above
> > > answered.
> > > 
> > OK, I lied ;-).  I did some more investigation, including a
> > disassembly of the TOS 3 & TOS 4 ROMs.  I assume TOS 2 is the same
> > in this area; I used TOS3/TOS4 because I had them handy.
> > 
> > I still believe there is a Hatari problem, but it is hidden with
> > the TOS ROMs because they do not check the DMA status register
> > after a floppy write. Hatari 
> > 1.7.x sets the DMA error bit (i.e. sets bit 0 to 0), which EmuTOS
> > reports as an 
> > error.  For *writes*, TOS doesn't check this bit, although it does
> > so for reads.
> > 
> Using the current EmuTOS CVS code, this problem does NOT occur with
> the latest official Hatari release (1.7.0); therefore it's a
> regression in the current Hatari development code.

The only related change to the DMA status that I can see is this patch
here:

 http://hg.tuxfamily.org/mercurialroot/hatari/hatari/rev/f84eb81fa309

Nicolas, any ideas what could be wrong here?

 Thomas