Re: [MiNT] Half-ugly fullscreen applications, how to recover when things go bump

["Jo Even Skarstein" <joska@online.no>]

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From: "Vincent Rivière" <vincent.riviere@freesbee.fr>
Sent: Friday, July 31, 2009 1:48 PM
To: "mint" <mint@fishpool.com>
Subject: Re: [MiNT] Half-ugly fullscreen applications, how to recover when 
things go bump

> Peter Persson wrote:
> > The biggest problem with this is that when something goes wrong, i.e. if 
> > the app crashes, I need to restore the desktop screen and 
> > keyboard/mouse/joystick vectors.
>
> The solution to make such cleanup may be GEMDOS vector VEC_CRITICALERR as 
> described here:
> http://cd.textfiles.com/ataricompendium/BOOK/HTML/CHAP2.HTM#gdvectors
>
> Another solution could be to hook the 68000 exceptions vectors directly 
> (bus error, adress error...). The MiNT function Psignal() with SIGBUS, 
> etc. may work, or even the signal() function in the MiNTLib.
>
> OS experts should tell us wich method is the good one.

I'm no OS expert, but I think Psigaction() is the way to go. Install a 
handler for SIGBUS which restores vectors and screen.

Jo Even