|RE: LMC1992/Microwire test WAS: [hatari-devel] No sound in the Pacemaker Demo|
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> 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'?
>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.