Re: made it to page 4 of gforth tutorial

From	foxchip <fox@ultratechnology.com>
Newsgroups	comp.lang.forth
Subject	Re: made it to page 4 of gforth tutorial
Date	2011-04-24 20:27 -0700
Organization	http://groups.google.com
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I have seen this before. It has some very serious problems.

: pick   ?dup if  swap >r 1- recurse r> swap  else dup  then ;

In the context I had showed being able to do this all might
first require slowing all stack access in Forth by a hundred
times. Calling five words recursively might make PICK a few
hundred thousands times slower again than other stack
operations.  It is a huge penalty whether one thinks PICK
is a good word or not.

It also has serious bugs.

On the processors I have worked on for a decade there are only
ten data stack cells and only nine cells on the return stack.
Also many ANS Forth compliant systems have fewer cells on their
return stack than on their data stack.

0 PICK is DUP and 1 PICK is OVER.  So on a ten deep data stack
one would only need to PICK at stack cells 2-9.

The standard only says, "An ambiguous condition exists if there are
less than u+2 items on the stack before PICK is executed."  It does
not warn of stack overflow but with u items on the stack you cannot
pick item u or it will cause a data stack overflow error or
data stack overwrite.  It is simply impossible.

With a 10 deep data stack and 9 deep return stack;

9 PICK \ maybe use a return stack cell for the return from PICK

on the first pass the ?DUP would cause data stack
cell 9 to be corrupted and case failure as
that was the one you wanted to pick.

Other systems might fail with a stack overflow exception.

That's not the only way it can fail.

N PICK \ where N is larger than cells on the return stack.

Use one return stack cell for PICK.
>R in the loop uses one stack cell and is repeated
counting down the counter.

N...,9,8,7,6,5,4,3,2,1,0

Resulting in failure before it gets to zero.
It thus has an environmental dependency
that the return stack be bigger than the data stack.

Without this explicit environmental dependency
statement it is not portable working code
as many compliant systems indeed have smaller
return stacks than data stacks. It also requires
that ?DUP SWAP etc. will not need to use the
return stack to return unless the return stack
is bigger still.

An early ANS draft required a minimum of 32 data
stack cells and 28 return stack cells.  That
requirement went away but showed the thinking
that a return stack smaller than the data stack
was ok.  Many ANS compliant implementations still
have fewer cells in their return stack than in
their data stack.

Besides just declaring various environmental
dependencies and accepting that it won't work
on many ANS Forth systems the only other halfway
practical option is to dump N words from the
data stack to memory, then index into this
dump, then load it back onto the data stack
with a copy of the Nth item on the top and
it would also be a requirement that the code
that does this must not add anything more than
one cell to the data stack in the code that does
that when the stack is nearly full when the
PICK is invoked.

And dumping the whole stack to memory
without using the stack could be very
very ugly or simply impossible without
a stack pointer somewhere and/or a stack
in memory.

I always said, "It is impolite to PICK
your nose or your stack in public."

It is primitive and repulsive code.
It is also considered impolite in many
cultures to expectorate, micturate, fart,
or evacuate your waste in public.

Best Wishes

Thread

made it to page 4 of gforth tutorial gavino <gavcomedy@gmail.com> - 2011-04-17 00:34 -0700
  Re: made it to page 4 of gforth tutorial "The Beez'" <hansoft@bigfoot.com> - 2011-04-17 02:29 -0700
  Re: made it to page 4 of gforth tutorial alberto pasquale <alberto@hal-pc.org> - 2011-04-18 12:55 -0700
    Re: made it to page 4 of gforth tutorial "The Beez'" <hansoft@bigfoot.com> - 2011-04-18 14:45 -0700
      Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-19 09:06 +0000
    Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-18 20:30 -0700
    Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-18 20:33 -0700
    Re: made it to page 4 of gforth tutorial David Kuehling <dvdkhlng@gmx.de> - 2011-04-19 13:04 +0200
      Re: made it to page 4 of gforth tutorial mhx@iae.nl (Marcel Hendrix) - 2011-04-19 22:09 +0200
        Re: made it to page 4 of gforth tutorial "The Beez'" <hansoft@bigfoot.com> - 2011-04-19 23:40 -0700
          Re: made it to page 4 of gforth tutorial mhx@iae.nl (Marcel Hendrix) - 2011-04-20 21:27 +0200
            Re: made it to page 4 of gforth tutorial alberto pasquale <alberto@hal-pc.org> - 2011-04-20 14:56 -0700
              Re: made it to page 4 of gforth tutorial stephenXXX@mpeforth.com (Stephen Pelc) - 2011-04-20 22:42 +0000
              Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-20 22:26 -0700
              Re: made it to page 4 of gforth tutorial mhx@iae.nl (Marcel Hendrix) - 2011-04-21 20:51 +0200
              Re: made it to page 4 of gforth tutorial Marc Olschok <nobody@nowhere.invalid> - 2011-04-26 16:40 +0000
                Re: made it to page 4 of gforth tutorial Bernd Paysan <bernd.paysan@gmx.de> - 2011-04-26 22:23 +0200
                Re: made it to page 4 of gforth tutorial Alex McDonald <blog@rivadpm.com> - 2011-04-26 13:34 -0700
                Re: made it to page 4 of gforth tutorial anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-04-27 14:48 +0000
            Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-21 04:07 -0500
              Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-21 07:38 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-21 08:10 -0700
                Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-22 12:35 +0000
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-22 08:51 -0700
                Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-23 10:17 +0000
                Re: made it to page 4 of gforth tutorial gavino <gavcomedy@gmail.com> - 2011-04-23 18:05 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-21 11:16 -0500
                Re: made it to page 4 of gforth tutorial anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-04-23 11:26 +0000
                Re: made it to page 4 of gforth tutorial gavino <gavcomedy@gmail.com> - 2011-04-23 18:07 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-24 00:10 -0700
              Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-21 11:38 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-21 15:13 -0500
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-21 14:07 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-21 15:05 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-21 15:24 -0700
                Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-22 12:48 +0000
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-22 10:51 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-21 17:41 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-21 18:16 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-21 18:58 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-21 19:49 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-22 00:02 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-22 06:59 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-23 01:20 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-21 21:11 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-22 00:16 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-22 10:12 -0700
                Re: made it to page 4 of gforth tutorial Jan Coombs <jan_2011-02@murray-microft.co.uk> - 2011-04-23 07:38 +0100
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-25 00:05 -0700
                Re: made it to page 4 of gforth tutorial Jan Coombs <jan_2011-02@murray-microft.co.uk> - 2011-04-25 13:34 +0100
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-25 08:50 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-25 23:11 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-22 00:18 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-22 10:19 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-25 10:43 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-25 13:17 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-25 16:32 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-25 18:21 -0700
                Re: made it to page 4 of gforth tutorial Charles G Montgomery <cgm@physics.utoledo.edu> - 2011-04-26 19:36 -0400
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-26 21:05 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-26 23:36 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-27 08:57 -0700
                Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-28 11:53 +0000
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-29 22:21 -0700
                Re: made it to page 4 of gforth tutorial Jan Coombs <jan_2011-02@murray-microft.co.uk> - 2011-04-27 17:41 +0100
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-27 09:53 -0700
                Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-26 11:39 +0000
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-25 23:22 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-26 17:51 -0700
                Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-23 10:33 +0000
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-25 00:48 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-29 22:24 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-22 09:44 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-22 11:36 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-22 17:08 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-23 18:11 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-23 00:49 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-23 03:55 -0500
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-23 14:47 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-23 11:12 -0700
                Re: made it to page 4 of gforth tutorial Jan Coombs <jan_2011-02@murray-microft.co.uk> - 2011-04-30 16:33 +0100
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-05-01 23:03 -0700
                Re: made it to page 4 of gforth tutorial Bernd Paysan <bernd.paysan@gmx.de> - 2011-05-02 22:15 +0200
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-05-02 19:15 -0700
                Re: made it to page 4 of gforth tutorial Jan Coombs <jan_2011-02@murray-microft.co.uk> - 2011-05-04 08:14 +0100
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-05-04 00:51 -0700
                Re: made it to page 4 of gforth tutorial Jan Coombs <jan_2011-02@murray-microft.co.uk> - 2011-05-04 22:03 +0100
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-30 03:15 -0500
                Re: made it to page 4 of gforth tutorial Elizabeth D Rather <erather@forth.com> - 2011-05-01 19:04 -1000
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-27 22:58 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-28 03:37 -0500
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-28 08:54 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-28 12:12 -0500
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-28 21:34 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-29 02:27 -0500
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-29 15:09 -0700
                Re: made it to page 4 of gforth tutorial Hugh Aguilar <hughaguilar96@yahoo.com> - 2011-05-02 21:47 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-28 10:49 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-28 21:57 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-05-03 13:28 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-28 11:01 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-23 14:02 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-25 07:08 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-26 10:47 -0700
                Re: made it to page 4 of gforth tutorial Alex McDonald <blog@rivadpm.com> - 2011-04-26 10:58 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-04-27 22:39 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-28 10:43 -0700
                Re: made it to page 4 of gforth tutorial David Thompson <dave.thompson2@verizon.net> - 2011-05-05 04:39 -0400
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-05-05 04:10 -0500
                Re: made it to page 4 of gforth tutorial stephenXXX@mpeforth.com (Stephen Pelc) - 2011-04-23 09:53 +0000
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-04-23 14:59 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-23 16:10 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-05-01 23:47 -0700
                Re: made it to page 4 of gforth tutorial John Passaniti <john.passaniti@gmail.com> - 2011-05-03 14:23 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-05-04 01:48 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-05-04 05:23 -0500
                Re: made it to page 4 of gforth tutorial John Passaniti <jpassaniti@ashly.com> - 2011-05-04 11:17 -0700
                Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-05-04 12:03 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-23 23:59 -0700
                Re: made it to page 4 of gforth tutorial Paul Rubin <no.email@nospam.invalid> - 2011-05-01 23:48 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-22 03:22 -0500
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-22 10:28 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-22 12:37 -0500
                Re: made it to page 4 of gforth tutorial David Kuehling <dvdkhlng@gmx.de> - 2011-04-22 20:07 +0200
                Re: made it to page 4 of gforth tutorial anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-04-22 18:55 +0000
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-23 23:25 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-24 03:27 -0500
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-24 20:20 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-25 03:24 -0500
                Re: made it to page 4 of gforth tutorial Elizabeth D Rather <erather@forth.com> - 2011-04-25 11:55 -1000
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-25 23:45 -0700
                Re: made it to page 4 of gforth tutorial Elizabeth D Rather <erather@forth.com> - 2011-04-25 21:49 -1000
                Re: made it to page 4 of gforth tutorial Alex McDonald <blog@rivadpm.com> - 2011-04-26 02:39 -0700
                Re: made it to page 4 of gforth tutorial Hugh Aguilar <hughaguilar96@yahoo.com> - 2011-04-26 03:19 -0700
                Re: made it to page 4 of gforth tutorial anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-04-26 10:01 +0000
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-23 03:43 -0500
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-23 23:53 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-24 20:27 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-25 03:35 -0500
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-26 00:20 -0700
                Re: made it to page 4 of gforth tutorial Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-04-26 04:02 -0500
                Re: made it to page 4 of gforth tutorial Bernd Paysan <bernd.paysan@gmx.de> - 2011-04-26 22:40 +0200
                Re: made it to page 4 of gforth tutorial Alex McDonald <blog@rivadpm.com> - 2011-04-25 14:16 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-25 23:25 -0700
                Re: made it to page 4 of gforth tutorial Alex McDonald <blog@rivadpm.com> - 2011-04-26 02:47 -0700
                Re: made it to page 4 of gforth tutorial anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-04-26 10:22 +0000
                Re: made it to page 4 of gforth tutorial Alex McDonald <blog@rivadpm.com> - 2011-04-26 10:45 -0700
                Re: made it to page 4 of gforth tutorial mhx@iae.nl (Marcel Hendrix) - 2011-04-26 22:19 +0200
                Re: made it to page 4 of gforth tutorial mhx@iae.nl (Marcel Hendrix) - 2011-04-27 21:05 +0200
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-22 11:44 -0700
                Re: made it to page 4 of gforth tutorial Elizabeth D Rather <erather@forth.com> - 2011-04-22 11:46 -1000
                Re: made it to page 4 of gforth tutorial Jan Coombs <jan_2011-02@murray-microft.co.uk> - 2011-04-23 08:02 +0100
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-23 23:46 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-24 01:32 -0700
                Re: made it to page 4 of gforth tutorial Elizabeth D Rather <erather@forth.com> - 2011-04-24 08:36 -1000
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-24 19:43 -0700
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-24 21:07 -0700
                Re: made it to page 4 of gforth tutorial Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-04-25 11:04 +0000
                Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-25 23:02 -0700
          Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-20 18:17 -0700
        Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-21 15:19 -0700
          Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-21 15:27 -0700
  Re: made it to page 4 of gforth tutorial gavino <gavcomedy@gmail.com> - 2011-04-21 16:54 -0700
    Re: made it to page 4 of gforth tutorial gavino <gavcomedy@gmail.com> - 2011-04-21 17:09 -0700
    Re: made it to page 4 of gforth tutorial foxchip <fox@ultratechnology.com> - 2011-04-21 17:57 -0700
    Re: made it to page 4 of gforth tutorial BruceMcF <agila61@netscape.net> - 2011-04-21 18:33 -0700

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