Re: Multi-Tasking on Apple IIgs?

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

The Wizard of Oz wrote:
> On Thu, 10 Mar 2005 18:57:51 +0000, Bryan Parkoff wrote:
>
>
> >    Is there a way to write assembly language that can run two applications 
> > at same time as multi-tasking?  It has to run first application and then 
> > switch to run second application at the same time.  It may be the Program 
> > Counter register that it can be modified.  I don't know how like Intel did.
> >
> > Bryan Parkoff
>
>
> 	I was going to ignore this thread until I thought about the possibility
> of co-processor cards. If a co-processor card could be active the same
> time as the GS processor then you could get true multi-tasking as opposed
> to the time slice mechanism everyone else is suggesting.

And, again, the software conventions assumed by most coprocessor cards
and the hardware assumptions for sharing memory (like nearly stopping
the main processor) make it very unlikely for any general multi-
processor scheme to be implemented--unless you do it all yourself,
that is.

-michael

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