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Re: double tasking with two interpreters

From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.lang.forth
Subject Re: double tasking with two interpreters
References <7xmx4tckcg.fsf@ruckus.brouhaha.com> <m4sbr2.dy0@spenarnc.xs4all.nl>
Date 2012-05-29 11:39 -0700
Message-ID <7xlika6dca.fsf@ruckus.brouhaha.com> (permalink)
Organization Nightsong/Fort GNOX

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Albert van der Horst <albert@spenarnc.xs4all.nl> writes:
> With all due respect yes. The greatest problem with 128 bytes of
> RAM is to fit 2 stacks and a user area. With 2 tasks those areas
> have to be duplicated.

I think it's not too bad.  A GA144 node has 10 data stack and 8 return
stack slots or so, which don't seem to be its biggest constraint, and
this processor is sort of comparable.  In the two-task setup if the code
follows reasonable practices, it should be possible to statically figure
out the max stack depths for each task, and allocate memory accordingly.
3-5 words (2 bytes/word) for each stack (especially with a bit of
compiler inlining to save return slots) is likely to be enough for the
sort of thing I have in mind, plus there might be a few static
variables.  Programming in assembler it's probably feasible for some
sensible programs to use no ram at all, other than the registers.

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Thread

double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-27 15:47 -0700
  Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-27 13:58 -1000
    Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-27 18:35 -0700
      Re: double tasking with two interpreters BruceMcF <agila61@netscape.net> - 2012-05-27 20:14 -0700
      Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-27 18:38 -1000
  Re: double tasking with two interpreters "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-05-28 12:08 -0400
    Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-28 09:21 -0700
      Re: double tasking with two interpreters BruceMcF <agila61@netscape.net> - 2012-05-28 10:11 -0700
      Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-28 07:24 -1000
        Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-28 11:11 -0700
          Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-28 11:23 -1000
            Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-28 14:36 -0700
              Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-28 12:52 -1000
                Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-28 17:14 -0700
                Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-28 15:33 -1000
                Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-28 18:53 -0700
                Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-28 22:34 -1000
                Re: double tasking with two interpreters Dirk Bruehl <dirk.bruehl@usa.net> - 2012-05-29 14:57 -0700
          Re: double tasking with two interpreters Bernd Paysan <bernd.paysan@gmx.de> - 2012-05-29 22:16 +0200
            Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-29 10:57 -1000
              Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-29 14:23 -0700
        Re: double tasking with two interpreters Rugxulo <rugxulo@gmail.com> - 2012-05-29 00:22 -0700
    Re: double tasking with two interpreters "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-05-28 12:42 -0400
      Re: double tasking with two interpreters "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-05-28 13:07 -0400
        Re: double tasking with two interpreters Coos Haak <chforth@hccnet.nl> - 2012-05-28 21:39 +0200
      Re: double tasking with two interpreters Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-05-29 12:56 +0000
    Re: double tasking with two interpreters Bernd Paysan <bernd.paysan@gmx.de> - 2012-05-29 22:12 +0200
  Re: double tasking with two interpreters anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-05-29 08:19 +0000
  Re: double tasking with two interpreters stephenXXX@mpeforth.com (Stephen Pelc) - 2012-05-29 11:52 +0000
    Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-29 11:17 -0700
      Re: double tasking with two interpreters stephenXXX@mpeforth.com (Stephen Pelc) - 2012-05-29 20:15 +0000
        Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-30 09:12 -0700
          Re: double tasking with two interpreters Dirk Bruehl <dirk.bruehl@usa.net> - 2012-05-30 20:20 -0700
    Re: double tasking with two interpreters Dirk Bruehl <dirk.bruehl@usa.net> - 2012-05-29 11:25 -0700
  Re: double tasking with two interpreters Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-05-29 12:52 +0000
    Re: double tasking with two interpreters stephenXXX@mpeforth.com (Stephen Pelc) - 2012-05-29 13:29 +0000
      Re: double tasking with two interpreters BruceMcF <agila61@netscape.net> - 2012-05-29 08:29 -0700
      Re: double tasking with two interpreters John Passaniti <john.passaniti@gmail.com> - 2012-05-29 14:24 -0700
        Re: double tasking with two interpreters Mark Wills <markrobertwills@yahoo.co.uk> - 2012-05-30 01:59 -0700
          Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-30 03:05 -0700
            Re: double tasking with two interpreters Mark Wills <markrobertwills@yahoo.co.uk> - 2012-05-30 03:19 -0700
              Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-30 08:24 -0700
          Re: double tasking with two interpreters John Passaniti <john.passaniti@gmail.com> - 2012-05-30 07:20 -0700
            Re: double tasking with two interpreters Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-05-31 11:32 +0000
              Re: double tasking with two interpreters John Passaniti <john.passaniti@gmail.com> - 2012-06-01 07:07 -0700
    Re: double tasking with two interpreters "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-05-29 11:55 -0400
      Re: double tasking with two interpreters "Elizabeth D. Rather" <erather@forth.com> - 2012-05-29 08:23 -1000
    Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-29 11:39 -0700
      Re: double tasking with two interpreters BruceMcF <agila61@netscape.net> - 2012-05-29 12:26 -0700
      Re: double tasking with two interpreters Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-05-30 09:34 +0000
        Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-30 03:02 -0700
          Re: double tasking with two interpreters Arnold Doray <invalid@invalid.com> - 2012-05-30 14:10 +0000
            Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-30 08:34 -0700
              Re: double tasking with two interpreters Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-05-31 11:44 +0000
                Re: double tasking with two interpreters Alex McDonald <blog@rivadpm.com> - 2012-05-31 07:02 -0700
          Re: double tasking with two interpreters BruceMcF <agila61@netscape.net> - 2012-05-31 07:17 -0700
    Re: double tasking with two interpreters David Kuehling <dvdkhlng@gmx.de> - 2012-05-31 10:09 +0200
      Re: double tasking with two interpreters Paul Rubin <no.email@nospam.invalid> - 2012-05-31 02:07 -0700

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