Re: More orca/m - flicker free animation

[toddpw@cco.caltech.edu (Todd P. Whitesel)]

andrep@balboa.eng.uci.edu (Andre Prellwitz) writes:

>  The solution?  Writing a "better" interrupt manager that made sure
>the stack was pointing at the proper place before passing control to the
>old vector routine.  Simple, yet a pain in the butt.

This iss still not totally safe, unlesss he makes sure that the 4 by
interrupt stack frame will not trash anything important (like data that
has yet to be scrolled). Code that does this must be careful or else it
will be subject to strange, inexplicable bugs when the phase of the moon
is incorrect.

Todd Whitesel
toddpw @ cco.caltech.edu