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Re: dot-quote implementation question

Date 2011-12-19 08:49 -1000
From "Elizabeth D. Rather" <erather@forth.com>
Organization FORTH, Inc.
Newsgroups comp.lang.forth
Subject Re: dot-quote implementation question
References (7 earlier) <36148df9-ee6c-43b3-bf46-d0123bd1f593@d17g2000yql.googlegroups.com> <jcknkl$3s3$1@speranza.aioe.org> <1970f26a-92f9-48b8-b4f6-9267c0e780eb@n39g2000yqh.googlegroups.com> <jcn3cl$3c4$1@speranza.aioe.org> <d90ad0d0-c722-44ea-b71b-90bb9ed13139@32g2000yqp.googlegroups.com>
Message-ID <C4SdnbePg62yGnLTnZ2dnUVZ_v2dnZ2d@supernews.com> (permalink)

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On 12/19/11 7:38 AM, BruceMcF wrote:
> On Dec 19, 5:26 am, "Rod Pemberton"<do_not_h...@noavailemail.cmm>
> wrote:
>
>>>> The sequence "LAST @ CFA !" stores DODOES into the CFA
>>>> overwriting a DOVAR put there via CREATE. The sequence "R>  ,"
>>>> stores the address of the after-DOES>  code in the PFA.
>
> Its been over a quarter century since I last used these archaic terms.
> Remind me what PFA is an abbreviation for? That's where the xt's go in
> the compiled Forth definitions, right?
>
> CFA:
>     Address-of-routine-to-perform-following
> PFA:
>     Address-of-word1
>     Address-of-word2
>     ...

Well, to be absolutely correct, PFA="Parameter Field *Address*" which 
means the address *of* the parameter field of the word being referenced. 
That is what you store in the parameter field of a word being compiled 
in an ITC implementation, for example. The *parameter field* is where 
the payload of a definition goes.

Similarly, CFA="Code Field Address" and is the address *of* the part of 
a definition that contains a pointer to the code to be executed, that 
is, the *code field*.

But lots of people get this wrong :-)

Cheers,
Elizabeth

-- 
==================================================
Elizabeth D. Rather   (US & Canada)   800-55-FORTH
FORTH Inc.                         +1 310.999.6784
5959 West Century Blvd. Suite 700
Los Angeles, CA 90045
http://www.forth.com

"Forth-based products and Services for real-time
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dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-10 05:28 -0500
  Re: dot-quote implementation question anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-12-10 12:00 +0000
    Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-10 06:52 -0800
    Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-10 21:10 -0500
      Re: dot-quote implementation question "A. K." <akk@nospam.org> - 2011-12-11 08:59 +0100
      Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-11 03:40 -0600
        Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-12 05:04 -0500
          Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-12 04:56 -0600
            Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-13 10:08 -0500
          Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-12 07:42 -0800
            Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-13 09:47 -0500
              Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-17 04:57 -0500
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-17 04:20 -0600
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-18 07:18 -0500
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-18 06:30 -0600
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-20 03:04 -0600
              Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-17 08:15 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-18 07:53 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-18 09:14 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-19 05:24 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 09:11 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 10:53 -0800
                Re: dot-quote implementation question "Elizabeth D. Rather" <erather@forth.com> - 2011-12-19 08:38 -1000
                Re: dot-quote implementation question "A. K." <akk@nospam.org> - 2011-12-19 21:34 +0100
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 12:51 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-18 10:16 -0800
                Re: dot-quote implementation question "Elizabeth D. Rather" <erather@forth.com> - 2011-12-18 08:18 -1000
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-19 05:25 -0500
                Re: dot-quote implementation question Coos Haak <chforth@hccnet.nl> - 2011-12-19 22:23 +0100
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:53 -0500
                Re: dot-quote implementation question Coos Haak <chforth@hccnet.nl> - 2011-12-20 19:58 +0100
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 11:44 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 16:16 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 11:50 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 14:56 -0500
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 21:49 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-18 14:33 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-19 05:26 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 09:38 -0800
                Re: dot-quote implementation question "Elizabeth D. Rather" <erather@forth.com> - 2011-12-19 08:49 -1000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 13:04 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:57 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 12:23 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 14:27 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 16:14 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 14:53 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 21:48 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 22:02 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-29 03:39 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-29 12:37 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-30 13:31 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-30 11:12 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-31 05:52 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-31 11:33 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-31 20:10 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-31 19:12 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2012-01-04 05:13 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2012-01-04 12:49 -0800
                Re: dot-quote implementation question Coos Haak <chforth@hccnet.nl> - 2011-12-22 00:55 +0100
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-20 21:43 +0000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 13:25 -0800
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-20 03:00 -0600
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 04:40 -0800
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-20 21:55 +0000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 14:33 -0800
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-22 20:33 +0000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-22 13:32 -0800
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-21 03:01 -0600
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-22 20:38 +0000
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:53 -0500
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:49 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 08:20 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 04:49 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:58 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 08:41 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 16:14 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 15:14 -0800
      Strings (was: dot-quote implementation question) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-12-11 10:33 +0000
        Re: Strings (was: dot-quote implementation question) kenney@cix.compulink.co.uk - 2011-12-12 02:53 -0600

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