Re: double tasking with two interpreters

Newsgroups	comp.lang.forth
From	Albert van der Horst <albert@spenarnc.xs4all.nl>
Subject	Re: double tasking with two interpreters
Date	2012-05-30 09:34 +0000
Message-ID	<m4txa4.c35@spenarnc.xs4all.nl> (permalink)
Organization	Dutch Forth Workshop
References	<7xmx4tckcg.fsf@ruckus.brouhaha.com> <m4sbr2.dy0@spenarnc.xs4all.nl> <7xlika6dca.fsf@ruckus.brouhaha.com>

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In article <7xlika6dca.fsf@ruckus.brouhaha.com>,
Paul Rubin  <no.email@nospam.invalid> wrote:
>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.

But the GA144 is not programmed in Forth! It is programmed in restricted
colorforth aka GA144 assembler.

Groetjes Albert

--
-- 
Albert van der Horst, UTRECHT,THE NETHERLANDS
Economic growth -- being exponential -- ultimately falters.
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst

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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