[A83] Re: 83p os


[Prev][Next][Index][Thread]

[A83] Re: 83p os



> >When saying "features", I was actually referring to the interrupt part:
> >how would you prevent any program from setting IM 2?
> If you already change the jumps you can also check that no program has an 
> IM2 instruction in it. But when you have self modifying code it's very 
> difficult to check.
I would say it's impossible to check without actually running the
program, unless you attach some hardware to the bus that can intercept
the instruction during the fetch cycle. I don't think there is an
algorithm that solves this problem.

-- 
http://www.fastmail.fm - Choose from over 50 domains or use your own



References: