Re: [hatari-devel] ikbd overrun when using midi (Bad Mood for Falcon)

[Laurent Sallafranque <laurent.sallafranque@xxxxxxx>]

Hi atarians,


I may enconter the same problem in my current dev.

I use the mouse and the keyboard.

Everything works as a charm since month without the music.


I added DMA music last week (two 8192 bytes buffer that I switch with a 
mfp7 interrupt at the end of the DMA play), and I get "random" ESC key 
press. When I don't use the music, I don't get these key pressed artifacts.


I haven't tested on real hardware, I'll do it today and tell you if I 
encounter the same behaviour.


That's just in case there's a patch, I can help testing.

Regards,


Le 10/11/2022 à 22:22, Nicolas Pomarède a écrit :
> Hi
>
> as discussed on atari-forum.com, the game Bad Mood by DML shows some 
> error in the sequence of received ikbd bytes, resulting in loss of 
> synchronisation when processing multi-bytes packets (when moving mouse 
> for example)
>
> problem is not reproducible on real Falcon ; under Hatari it happens 
> when midi runs at the same time.
>
> Looking at the code for both ikbd and midi IRQ, I might have an idea 
> of what is causing this.
>
> Eero, as you managed to reproduce the bug on Hatari, can you try the 
> following patch with Bad Mood latest binary and see if any hang in Bad 
> Mood happens after printing those debug lines ""error clearing mfp irq" ?
>
> It's possible some lines are printed and bad mood doesn't hang, but I 
> think than when bad mood hangs this error line should be printed just 
> before.
>
>
> Nicolas