Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site well.UUCP
Path: utzoo!decvax!decwrl!amdcad!lll-crg!lll-lcc!well!tenney
From: tenney@well.UUCP (Glenn S. Tenney)
Newsgroups: net.micro.amiga,net.lang.forth
Subject: Re: Need help with MVP-Forth
Message-ID: <734@well.UUCP>
Date: Thu, 6-Mar-86 16:45:40 EST
Article-I.D.: well.734
Posted: Thu Mar  6 16:45:40 1986
Date-Received: Sat, 8-Mar-86 12:19:13 EST
References: <1360@tekgvs.UUCP> <1016@cadovax.UUCP>
Reply-To: tenney@well.UUCP (Glenn S. Tenney)
Distribution: na
Organization: Whole Earth Lectronic Link, Sausalito CA
Lines: 57
Xref: decwrl net.micro.amiga:2288 net.lang.forth:991

In article <1016@cadovax.UUCP> keithd@cadovax.UUCP (Keith Doyle) writes:
>In article <1360@tekgvs.UUCP> keithe@tekgvs.UUCP (Keith Ericson) writes:
>>How does one specify the screen-file for MVP-FORTH to use?
>>keith
>
>Rather than manually decompile MVP-Forth, check the screen file
>mvpamiga.scr.  This is apparently the entire source for MVP-Forth,
>in a cross compiler format that looks an awful lot like the 'Nautilus'
>cross compiler.  This is how I found out how that stuff works, the
>words FROM and INCLUDE are commented on their source screens.
> 
The complete source IS on the disk and it cross compiles with a
modified version of the Nautilus cross compiler.  Once other obligations
are out of the way, I hope to provide a better (more complete?)
FORTH developer's environment (The check isn't even "in the mail",
so don't ask me when it'll be available.)  There is a packet of
Amiga specific documentation available that I hope describes all
of these new MVP-FORTH words.  Give Mountain View Press a call to see
how to get the doc.

>
>Also note, that if you do a VLIST to list the dictionary, it seems as if
>you can't interrupt it.  Actually, you can.  You have to hit the space bar
> ...
MVP-FORTH is virtually the same across all the machines supporting it (this
includes CP/M, Apple II, IBM PC etc.) and that's the way Glen Haydon did it.
In doing the Amiga version I couldn't really change things too much without
causing raised fur.  Believe me, there were MANY things I wanted to change
(improve).  The plus side is that all of the books and programs being sold
for MVP-FORTH are compatible.  (I haven't tried, but the Expert system should
slide right in.)
>
>Anyone notice how SLOW it is when you do VLIST?   Yet the screen editor
>'laxen.ed' is pretty fast.     ...
This is a combination problem:  The text output is currently being done
using AmigaDOS.  EMIT (a single character) or TYPE (a string) are each done
with a single call to AmigaDOS.  VLIST can't just TYPE each word name because
the number of characters in the name might be more than the number of
characters actually stored (WIDTH is set to 3 for example).  VLIST then 
EMITs a character at a time therefore it is SLOW. 
>
>There dosen't seem to be an interrupt out of an endless loop that I've
>been able to discover.  If anyone knows of one (and/or perhaps good reasons
>why it was difficult) please post.
You're right, it should be in a *real* FORTH system, but I wanted to get
MVP-FORTH out asap and as a public domain implementation.
>
>Keith Doyle
>#  {ucbvax,ihnp4,decvax}!trwrb!cadovax!keithd
>#  cadovax!keithd@ucla-locus.arpa

(The author of MVP-FORTH for the Amiga)
-- Glenn Tenney 
UUCP: {hplabs,glacier,lll-crg,ihnp4!ptsfa}!well!tenney
ARPA: well!tenney@LLL-CRG.ARPA        Delphi and MCI Mail: TENNEY
As Alphonso Bodoya would say... (tnx boulton)
Disclaimers? DISCLAIMERS!? I don' gotta show you no stinking DISCLAIMERS!