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From: jesup@mizar.steinmetz (Randell Jesup)
Newsgroups: comp.sys.amiga
Subject: Re: DELTA RESEARCH?
Message-ID: <7407@steinmetz.steinmetz.UUCP>
Date: Fri, 18-Sep-87 19:05:14 EDT
Article-I.D.: steinmet.7407
Posted: Fri Sep 18 19:05:14 1987
Date-Received: Sun, 20-Sep-87 04:47:55 EDT
References: <1126@vu-vlsi.UUCP> <2355@cbmvax.UUCP>
Sender: root@steinmetz.steinmetz.UUCP
Reply-To: jesup@mizar.UUCP (Randell Jesup)
Distribution: na
Organization: General Electric CRD, Schenectady, NY
Lines: 35
Keywords: In Business?

In article <2355@cbmvax.UUCP> mikec@cbmvax.UUCP (Mike Colligon QA) writes:
>In article <1126@vu-vlsi.UUCP> cheung@vu-vlsi.UUCP (Wilson Cheung) writes:
>>I've had J-FORTH back ordered from Go Amigo for over a week.  They
>>claim that they have been trying to get into contact with the
>>manufacturer Delta Research for over a week with no success.  Anyone
>>know if the company still exists? 

	If my info is correct, it's a small operation (garage), so they
may not be there during the day.

>about, and this is why I have Multi-FORTH.  J-FORTH is JSR threaded, whereas
>Multi-FORTH is tokenized.  J-FORTH produces larger code, but is slightly
>faster.  The J-FORTH documentation is reported to be not very useful; I read
>the Multi-FORTH manual and then started writing little programs.  YES, I read
>the documentation FIRST. :-)  J-FORTH has not been set up for Amiga specific
>activities (opening windows, menus, etc.).  Multi-FORTH has routines to open
...
>send in for my upgrade to 1.21.)  From what I have been told, J-FORTH does not
>support any of these things, but you can do them if you want to hack at it.

	First, JSR-threading vs. tokenized:  JSR-threading (esp. with
an optimizer) is considerably faster, not just a little.  With the JSR-threaded
forth I hacked up for the Amiga at one point, I got 9 sec for 10 iterations
of the sieve, vs 7 for the then-current Lattice.  The best I heard of for
a 'regular' forth was in the 30-100 sec range (note 10 iterations, not 1).
Tokenized is the slowest type of threading, (after indirect-threaded), JSR
is the fastest.
	Second, my information is that J-Forth does have access to all the
Amiga library functions.  Please do not make authoritative statements on
things you do not know.  (Sorry if that's a bit nasty, but if you were the
author of a package, and people who hadn't seen it said things like that,
you'd be pretty upset, I suspect).
	Randell Jesup  (Please use one of these paths for mail)
	sungod!jesup@steinmetz.UUCP (uunet!steinmetz!{sungod|crd}!jesup)
	jesup@ge-crd.ARPA