Re: [hatari-devel] Fixed Stocasto and H2O music

[Laurent Sallafranque <laurent.sallafranque@xxxxxxx>]

OK, I think I see the problem with host interrupts.

I coded this a few years ago, but it semms to be bugged (the interrupt 
test ocures too late).

I'll try to fix it.

I've written a little program to test it. If you have one too, this 
would make 2 programs to test the fix, and I'd be interrested.

Regards

Laurent



Le 02/12/2020 à 21:15, Laurent Sallafranque a écrit :
> I'll look at the timer, this sounds interresting ;)
>
>
> Le 02/12/2020 à 21:08, Laurent Sallafranque a écrit :
> > From what I can read in the DSP code, Host port interrupts are taken 
> > into account.
> >
> > Maybe you could send me a little program (DSP part + 68030 part) that 
> > does exactly what you described (like this, I'll have the DSP inits 
> > for the registers, ... and I'll be able to see what the problem is).
> >
> >
> > Thanks in advance.
> >
> > Regards
> >
> > Laurent
> >
> >
> >
> > Le 02/12/2020 à 19:46, Mariusz Buras a écrit :
> > > Hello
> > >
> > > Port C (section 11 of the DSP56000/1 User's Manual) contains a UART
> > > circuitry which isn't wired anywhere on Falcon (In fact the chip
> > > package doesn't have the pins as it's much smaller than the regular
> > > chip). However, you can still use the bad rate generator as a timer to
> > > trigger DSP interrupts (org p:$1C). I use it in my demo Lockup to
> > > drive my music playback routine.
> > >
> > > As for the host port interrupts you can do:
> > >                      org     p:$22
> > >                      movep   x:(r5)+,x:<<M_HTX
> > >                      nop
> > >
> > >                      ...
> > >                      move   #some_data,r5
> > >                      bset    #1,x:<<M_HCR    ; enable transmit 
> > > interrupt
> > >
> > >
> > > And then you can go and do whatever with the DSP while $22 interrupt
> > > will be fired every time 030 empties the M_HTX register. This is
> > > almost like a DMA ;) I believe this doesn't work in Hatari.
> > >
> > > Let me know if you need more info.
> > >
> > > Regards
> > > Mariusz
> > >
> > >
> > >
> > >
> > > On Wed, 2 Dec 2020 at 18:00, Laurent Sallafranque
> > > <laurent.sallafranque@xxxxxxx> wrote:
> > > > Hi,
> > > >
> > > >
> > > > Can you give me some examples ?
> > > >
> > > > Or documentation source ?
> > > >
> > > > I thought everything was implemented into the DSP.
> > > >
> > > > Regards
> > > >
> > > > Laurent
> > > >
> > > >
> > > > Le 02/12/2020 à 16:33, Mariusz Buras a écrit :
> > > > > On Wed, 2 Dec 2020 at 15:26, Nicolas Pomarède 
> > > > > <npomarede@xxxxxxxxxxxx> wrote:
> > > > >
> > > > > > thanks, now you can work on the Videl stuffs ;-)
> > > > > While you're there, it would be nice to get DSP timer implemented and
> > > > > host port interrupts to drive the transfer on the DSP side :P
> > > > >
> > > > > Regards
> > > > > Mariusz