Re: A85: Ram OS-new OS for 85

To: assembly-85@lists.ticalc.org
Subject: Re: A85: Ram OS-new OS for 85
From: Mike Baker <mbm00@hotmail.com>
Date: Sun, 10 Aug 1997 23:05:51 -0400
References: <19970810231626.29259.qmail@hotmail.com> <33EE51DE.2F4B@hotmail.com> <33EE9652.DAF92B45@geocities.com> <19970810.224549.11262.1.ariwsi@juno.com>
Reply-To: assembly-85@lists.ticalc.org

that's a great idea, but even if you could switch task what about
mirroring all the memory areas?

Mike Baker
mbm00@hotmail.com

__________________________________________________________________________
Get your free, Phat based OS at http://missoula.bigsky.net/oxymoron/phat


ariwsi@juno.com wrote:
> 
> On Sun, 10 Aug 1997 Jonathan Anderson <sarlok@geocities.com> writes:
> 
> >As far as multitasking, preemptive multitasking (where the shell
> >switches when it wants) would be impossible if you could not determine
> >the program counter,
> 
> You can!  Whenever an interrupt occurs (the only time you would get
> a chance to switch tasks preemptively), the program counder is stored
> on the stack!
> 
> However, the whole preemptive multitasking idea is wrecked whenever
> a program disables interrupts, sets the interrupt mode back to 1, or
> changes the I register to its own interrupt code...
> 
> --
> Patrick Davidson (ariwsi@juno.com)
> Visit my home page!  Stuff for Amiga, TI-85, TI-92, even DOS!
> http://www.calweb.com/~kwdavids/patrick/
> http://www.toptown.com/hp/ariwsi/

References:

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From: "Matt Butch" <mjb25@hotmail.com>

Re: A85: Ram OS-new OS for 85

From: Mike Baker <mbm00@hotmail.com>

Re: A85: Ram OS-new OS for 85

From: Jonathan Anderson <sarlok@geocities.com>

Re: A85: Ram OS-new OS for 85

From: ariwsi@juno.com