RE: LMC1992/Microwire test WAS: [hatari-devel] No sound in the Pacemaker Demo

[David Savinkoff <dsavnkff@xxxxxxxxx>]

Hi, Cyprian

Could you try this modified code to see if you get YM sound.
I'm expecting no sound because I don't expect $C1FF/$8000 to work.

Thanks
----- Cyprian Konador wrote:
> > From: David Savinkoff 
> > Sent: Wednesday, June 04, 2014 8:00 PM
> > ----- Cyprian Konador wrote:
> > > Hi All,
> > > 
> > > I've just checked that case on real MSTE and combination $ C1FF/$8000 gives the same result as $401/$7ff
> >
> > Can you explain what is happening ?
> >
> > Why would one use $C1FF/$8000 when one could use $401/$7FF ?
> >
> > (I've never programmed a STe)
> 
> Actually, I have no idea why one could use it, but Nicolas found out that Pacemaker Demo use that strange combination. Therefore IMO would be nice to implement that behavior in Hatari.
> 
> Interesting question is why it works. We know that LMC192 should receive 11 bit frame from Microwire. Maybe Shifter/Microwire in case of needs complements the frame to eleven with '1'?
> 
> -----Original Message-----
> >From: Nicolas Pomarède 
> >Sent: Thursday, May 29, 2014 8:53 PM
> >
> > >Am 29.05.2014 20:00, schrieb Jerome Vernet:
> > >
> > > Still no sound in the Pacemaker Demo.
> > >
> >
> >It seems  there's a problem when microwire mixer is set.
> >
> >Demo set mask to 0xc1ff and data to 0x8000, which should decode as 
> >command 10 000 000000 and set mixer=0.

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