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Groups > comp.lang.forth > #38827

Re: FORTH - How Does It Work?

From "Rod Pemberton" <bork@lllljunkqwer.cpm>
Newsgroups comp.lang.forth
Subject Re: FORTH - How Does It Work?
Date 2015-05-04 20:01 -0400
Organization Aioe.org NNTP Server
Message-ID <op.xx4yb92nwa0t4m@localhost> (permalink)
References <058a96b0-8a32-476d-b062-a8db0be69130@googlegroups.com> <HJCdnZxcKOLXItrInZ2dnUU7-emdnZ2d@supernews.com> <5547c4e0$0$3072$e4fe514c@dreader35.news.xs4all.nl>

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On Mon, 04 May 2015 15:13:36 -0400, Albert van der Horst  
<albert@spenarnc.xs4all.nl> wrote:

> Well the OP suggest this to people who want to know how Forth
> works on the inside. An alternative is to randomly start SEE-ing
> some code in a Forth you use.
> For an extreme example take this:
>
> Gforth 0.7.0, Copyright (C) 1995-2008 Free Software Foundation, Inc.
> Gforth comes with ABSOLUTELY NO WARRANTY; for details type `license'
> Type `bye' to exit
> SEE TO
> noname :
>   ' dup >definer 140003129076120 >definer =
>   IF     16 + !
>   ELSE   -32 throw
>   THEN ;
> latestxt
>
> noname :
>   COMP' drop dup >definer 140003129076120 >definer over =
>   IF     drop 16 +  POSTPONE ALiteral 6396632 compile,
>   ELSE   140003129105440 >definer over =
>          IF     drop 6397824 compile, 16 + @ lp-offset, 6396656 compile,
>          ELSE   140003129105608 >definer over =
>                 IF     drop 6397824 compile, 16 + @ lp-offset, 6396632  
> compile,
>
>                 ELSE   140003129105496 >definer over =
>                        IF     drop 6397824 compile, 16 + @ lp-offset,  
> 6396664
>                               compile,
>                        ELSE   140003129105552 >definer over =
>                               IF     drop 6397824 compile, 16 + @  
> lp-offset,
>                                      6397288 compile,
>                               ELSE   -32 throw drop
>                               THEN
>                        THEN
>                 THEN
>          THEN
>   THEN ;
> latestxt
> interpret/compile: TO  ok
>
> Compared to Ting's books this is pretty intimidating.
> Of course you're right that Forth is not defined by an implementation,
> and this example serves to show how different implementations are,
> but traditionally (some) people *are* interested in how one manages to
> make a compiler/interpreter.
>

It seems that the constants beginning with digit '6' might be XTs
due to COMPILE, .  I could guess that >DEFINER takes the constants
which begin with '14', but what is >DEFINER ?

Are the large constants the XTs of primitive words?
Are they the XTs of NONAME words?

Can I execute '6397824'?  (Yes.)
Can I execute '140003129105440'?  ...
Can I display their name or SEE their code?


Rod Pemberton

-- 
Cars kill more people than guns in the U.S.
Yet, no one is trying to take away your car.

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Thread

FORTH - How Does It Work? Jason Damisch <jasondamisch@yahoo.com> - 2015-05-04 09:44 -0700
  FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-04 10:21 -0700
    Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-04 11:00 -0700
      Re: FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-05 03:03 -0700
      Re: FORTH - How Does It Work? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-05-05 11:31 +0000
    Re: FORTH - How Does It Work? lehs <skydda.barnen@gmail.com> - 2015-05-05 01:31 -0700
      Re: FORTH - How Does It Work? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-05-05 08:49 +0000
      Re: FORTH - How Does It Work? Lars Brinkhoff <lars.spam@nocrew.org> - 2015-05-05 11:16 +0200
      Re: FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-05 02:33 -0700
  Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-05-04 08:49 -1000
    Re: FORTH - How Does It Work? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-05-04 19:13 +0000
      Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-04 20:35 +0100
        Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-05-04 10:43 -1000
        Re: FORTH - How Does It Work? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-05-05 08:52 +0000
          Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-05 10:54 +0100
            Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-05 10:56 +0100
      Re: FORTH - How Does It Work? "Rod Pemberton" <bork@lllljunkqwer.cpm> - 2015-05-04 20:01 -0400
        Re: FORTH - How Does It Work? Jason Damisch <jasondamisch@yahoo.com> - 2015-05-04 17:23 -0700
        Re: FORTH - How Does It Work? Jason Damisch <jasondamisch@yahoo.com> - 2015-05-04 17:34 -0700
          Re: FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-05 00:25 -0700
            Re: FORTH - How Does It Work? Coos Haak <chforth@hccnet.nl> - 2015-05-05 12:41 +0200
          Re: FORTH - How Does It Work? "Rod Pemberton" <bork@lllljunkqwer.cpm> - 2015-05-05 03:31 -0400
            Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-05 08:41 +0100
        Re: FORTH - How Does It Work? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-05-05 11:36 +0000
    Re: FORTH - How Does It Work? "HAA" <someone@microsoft.com> - 2015-05-07 11:26 +1000
      Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-05-06 16:46 -1000
        Re: FORTH - How Does It Work? lehs <skydda.barnen@gmail.com> - 2015-05-07 00:06 -0700
        Re: FORTH - How Does It Work? "HAA" <someone@microsoft.com> - 2015-05-10 12:57 +1000
          Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-09 21:36 -0700
          Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-05-09 18:36 -1000
            Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-09 22:09 -0700
              Re: FORTH - How Does It Work? Walter Banks <walter@bytecraft.com> - 2015-05-10 13:38 -0400
                Re: FORTH - How Does It Work? Richard Owlett <rowlett@cloud85.net> - 2015-05-10 14:23 -0500
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-10 20:51 +0100
                Re: FORTH - How Does It Work? Coos Haak <chforth@hccnet.nl> - 2015-05-11 01:18 +0200
                Apology to Walter Banks - was [Re: FORTH - How Does It Work?] Richard Owlett <rowlett@cloud85.net> - 2015-05-10 23:09 -0500
                Re: Apology to Walter Banks - was [Re: FORTH - How Does It Work?] Walter Banks <walter@bytecraft.com> - 2015-05-11 07:24 -0400
                Re: Apology to Walter Banks - was [Re: FORTH - How Does It Work?] rickman <gnuarm@gmail.com> - 2015-05-11 11:34 -0400
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-10 19:18 -0700
                Re: FORTH - How Does It Work? Walter Banks <walter@bytecraft.com> - 2015-05-11 07:50 -0400
                Re: FORTH - How Does It Work? beeflo <beeflobill@gmail.com> - 2015-05-11 09:37 -0700
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 11:32 -0700
                Re: FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-12 05:21 -0700
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-12 14:08 +0100
                Re: FORTH - How Does It Work? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-05-12 14:52 +0000
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-12 17:18 +0100
                Re: FORTH - How Does It Work? Lars Brinkhoff <lars.spam@nocrew.org> - 2015-05-13 08:41 +0200
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-13 08:07 +0100
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-13 19:29 -0700
                Re: FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-12 08:10 -0700
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-12 17:13 +0100
                Re: FORTH - How Does It Work? Jason Damisch <jasondamisch@yahoo.com> - 2015-05-12 09:33 -0700
                Re: FORTH - How Does It Work? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-05-12 15:38 +0000
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-12 21:51 -0700
                Re: FORTH - How Does It Work? "WJ" <w_a_x_man@yahoo.com> - 2015-05-12 16:05 +0000
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-14 17:26 -0700
                Re: FORTH - How Does It Work? bettilyona@gmail.com - 2015-06-02 10:21 -0700
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-06-02 20:39 -0700
                Re: FORTH - How Does It Work? bettilyona@gmail.com - 2015-06-08 13:14 -0700
                Re: FORTH - How Does It Work? Hans Bezemer <the.beez.speaks@gmail.com> - 2015-06-20 13:15 +0200
                Re: FORTH - How Does It Work? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-06-20 14:37 +0000
                Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-06-20 08:23 -1000
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-06-20 19:24 -0700
                Re: FORTH - How Does It Work? Hans Bezemer <the.beez.speaks@gmail.com> - 2015-06-21 12:30 +0200
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-06-21 20:58 +0100
                Re: FORTH - How Does It Work? Bernd Paysan <bernd.paysan@gmx.de> - 2015-06-22 00:13 +0200
            Re: FORTH - How Does It Work? "HAA" <someone@microsoft.com> - 2015-05-11 12:10 +1000
              Re: FORTH - How Does It Work? rickman <gnuarm@gmail.com> - 2015-05-11 11:35 -0400
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-11 16:52 +0100
                Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-05-11 08:12 -1000
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 12:37 -0700
                Re: FORTH - How Does It Work? Walter Banks <walter@bytecraft.com> - 2015-05-11 15:59 -0400
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-11 21:34 +0100
                Re: FORTH - How Does It Work? rickman <gnuarm@gmail.com> - 2015-05-11 16:42 -0400
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-11 21:52 +0100
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 14:55 -0700
                Re: FORTH - How Does It Work? "WJ" <w_a_x_man@yahoo.com> - 2015-05-12 16:22 +0000
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-12 22:42 -0700
                Re: FORTH - How Does It Work? Jason Damisch <jasondamisch@yahoo.com> - 2015-05-13 11:18 -0700
                Re: FORTH - How Does It Work? "WJ" <w_a_x_man@yahoo.com> - 2015-05-25 15:04 +0000
                Re: FORTH - How Does It Work? rickman <gnuarm@gmail.com> - 2015-05-11 20:38 -0400
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 14:31 -0700
                Re: FORTH - How Does It Work? Walter Banks <walter@bytecraft.com> - 2015-05-12 07:06 -0400
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-11 21:30 +0100
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 14:52 -0700
                Re: FORTH - How Does It Work? rickman <gnuarm@gmail.com> - 2015-05-11 20:40 -0400
                Re: FORTH - How Does It Work? Bernd Paysan <bernd.paysan@gmx.de> - 2015-05-12 03:38 +0200
                Re: FORTH - How Does It Work? rickman <gnuarm@gmail.com> - 2015-05-11 22:10 -0400
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 20:25 -0700
                Re: FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-12 01:13 -0700
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-12 11:03 +0100
                Re: FORTH - How Does It Work? Bernd Paysan <bernd.paysan@gmx.de> - 2015-05-12 16:08 +0200
                Re: FORTH - How Does It Work? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-05-12 14:04 +0000
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 19:08 -0700
                Re: FORTH - How Does It Work? rickman <gnuarm@gmail.com> - 2015-05-11 22:46 -0400
                Re: FORTH - How Does It Work? "HAA" <someone@microsoft.com> - 2015-05-14 18:30 +1000
                Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-05-13 22:55 -1000
                Re: FORTH - How Does It Work? "HAA" <someone@microsoft.com> - 2015-05-16 05:08 +1000
                Re: FORTH - How Does It Work? "Elizabeth D. Rather" <erather@forth.com> - 2015-05-15 09:54 -1000
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-20 13:59 -0700
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-14 10:40 +0100
                Re: FORTH - How Does It Work? Mark Wills <markwills1970@gmail.com> - 2015-05-14 03:12 -0700
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-14 12:03 +0100
            Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-10 22:09 -0700
              Re: FORTH - How Does It Work? Jason Damisch <jasondamisch@yahoo.com> - 2015-05-11 10:12 -0700
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-11 18:57 +0100
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-11 11:48 -0700
                Re: FORTH - How Does It Work? "Alex McDonald" <blog@rivadpm.com> - 2015-05-11 20:28 +0100
                Re: FORTH - How Does It Work? hughaguilar96@gmail.com - 2015-05-12 21:28 -0700
        Re: FORTH - How Does It Work? rickman <gnuarm@gmail.com> - 2015-05-11 11:29 -0400
  Re: FORTH - How Does It Work? Ching-Tang Tseng <ilikeforth@gmail.com> - 2015-05-04 19:40 -0700
  Re: FORTH - How Does It Work? tthomas@duelcraft2.com - 2015-05-08 16:22 -0700

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