Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!ames!uhccux!munnari.oz.au!kaukau.comp.vuw.ac.nz!comp.vuw.ac.nz!dsiramd!marcamd!aucsv!robert-s
From: robert-s@aucsv.aukuni.ac.nz (Robert Sheehan )
Newsgroups: comp.sys.apple2
Subject: Re: Multi-tasking on the IIe
Summary: How about a Switcher for the IIe/IIc?
Message-ID: <27@aucsv.aukuni.ac.nz>
Date: 15 Mar 90 22:55:41 GMT
References: <6992@hydra.gatech.EDU>
Organization: Computer Science Dept. University of Auckland, New Zealand
Lines: 14


Rather than provide true multi-tasking which could be very slow I would like
to see someone write a Switcher type program for the IIe/IIc with VBL 
interrupts.

I know that Beagle Bros had a program which allowed two 64K programs to be held
in memory simultaneously and switched between.  With my aux memory card and 1
Meg I would like to hold several 128K programs in memory and switch between 
them retaining all position info, rather than keeping them in a Ramdisk and
reloading them when I wanted to run.

I realise there are problems: It would require moving large amounts of memory
around, but the different aux mem banks can be switched between quite easily,
the text and graphics pages would have to be specially taken care of.