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Re: Multithreading OS for the C64

Subject: Re: Multithreading OS for the C64
From: msokos1@umbc.edu (sokos mark)
Date: 1996/07/03
Newsgroups: comp.sys.cbm, comp.emulators.cbm, comp.sys.apple2, comp.sys.atari.8bit, alt.comp.hardware.homebuilt
Organization: University of Maryland, Baltimore County
References: <4q3u1i$rd7@sun0.urz.uni-heidelberg.de> <Dtvnp8.9p3@inter.NL.net>

In article <Dtvnp8.9p3@inter.NL.net>,
Maarten Ruigrok <M.Ruigrok@inter.nl.net> wrote:
>how did you make it pre-emptive when the 6502 processor itself has no way to
>check for boundaries or anything (so called trap errors coming from the
>processor itself (in pc systems btw)). In what way can the operating system 
>take
>back and control software running under it?. 

I'm guessing he uses the timer interrupt. Am I close?

------------------------------------------------------------------------
Mark Sokos (msokos1@gl.umbc.edu) http://www.gl.umbc.edu/~msokos1
- Electrical Engineer, Programmer, Musician, and Perpetual Student
- Keeper of the FAQ, alt.comp.hardware.homebuilt

Follow-Ups:
- Re: Multithreading OS for the C64
  - From: martijnb@stack.urc.tue.nl (Martijn van Buul)

References:
- Multithreading OS for the C64
  - From: fs1@aixterm2.urz.uni-heidelberg.de (Andre Fachat)
- Re: Multithreading OS for the C64
  - From: M.Ruigrok@inter.nl.net (Maarten Ruigrok)

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