Re: What would you want in GS/OS 7.0?

["Michael J. Mahon" <mjmahon@aol.com>]

IUnknown wrote:
> > - Rewrite all the tool sets so that they are safe to use in a preemptive
> >   multitasking environment.
> > - Add preemptive multitasking capability.
>
>
> (disclaimer: didn't get much sleep last night- ramblings of a madman)
>
> Sadly, this is one of those things that will likely never be possible,
> at least not without requiring additional hardware.
>
> The IIgs GS/OS toolbox shared much of it's architecture with the early
> versions of macOS. Even with a proper MMU, apple was never able to get
> a reliable version of it working on a mac.
>
> The IIgs is complicated because there is no memory protection in
> place, which means that all toolbox calls need to ensure that the
> descriptor handles and memory they are working with isn't being used
> by someone else... which would require each toolbox call to be
> prefixed by some overriding process identifier handle....

This isn't really necessary, since the OS always knows which process
it last dispatched, and that's the only one that can be calling.

-michael

NadaNet and AppleCrate II: parallel computing for Apple II computers!
Home page: http://home.comcast.net/~mjmahon

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