I didn't think your question got properly answered, so I'm going to
add a few comments and a few off-topic links.
gforth, as I see it, would best be described as a hosted forth. So,
if you want to use it as an embedded system, you'll need to put at
least glib (thus, ulib, as Edward mentioned) underneath it.
Or, if you have a few megabytes of flash and RAM to keep a full host
OS, you might try a stripped-down Linux or BSD underneath gforth.
(netBSD and openBSD have small footprints, and then there are "Damn
Small Linux" and "Puppy Linux" and similar. If you check around those
communities, they can point you to even smaller unix-ish host OSses.
I'm not sure what Bernd and David are doing, didn't take the time to
check, but it would be theoretically possible to go the other
direction, and replace the parts of glib that gforth is dependent on
with your own code. I don't think gforth uses all that much of glib,
so it may just be a matter of a few primitive routines.
Other places you might want to look for more information on using
FORTH as the embedded OS -- forth.org is back up, and has a number of
very small models of the old fig-FORTHs:
http://forth.org
http://forth.org/fig-forth/contents.html
The fig-FORTH model listings are partial image-to-pdf conversions,
you'll need to be able to view large graphical PDF files. But, for
all that the pdfs are huge downloads (12M), the actual listings are
on the order of 40 ~ 80 pages of assembly language language, and not
very dense, at that. Definitely possible for a single person to read
and understand within a month or so.
Your question moved me to blog yesterday about my experience porting
a fig model to the 6809 many moons ago, see http://
reiisi.blogspot.com . If you're interested in the 6809 source and my
annotations, and can't (don't want to?) find the tools to get them
out of the .hqx, let me know off-list. (I think I'll eventually re-
organize my site and put those back up as tarballs, but I'm working
on something else today.)
OpenFirmware might be interesting, or might be confusing overkill.
You can search on, say, google, for "openfirmware arm".
Finally, have you seen comp.lang.forth, accessible at many newsgroup
portals, for instance, google's groups at http://groups.google.com ?
On 平成 20/07/26, at 0:04, Jelle de Jong wrote:
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Hello everybody,
My name is Jelle and I'm new to this mailinglist, so let me first
thank
~ you all for the development of gforth.
In all my years of collage I never heard of the forth language. So
when
I was reading through a "designing embedded hardware" book i came
across
a forth chapter and read it with some surprises.
gforth looks interesting and I would like to know if I can build an
embedded "system on chip system" with an ARM9 or ARM7 and create a
firmware programmed in gforth for the device? I need to be able to
control all the hardware, create interrupt routines and all the other
stuff normally possible in embedded systems.
Are there people here that have programmed arm systems with gforth? If
possible and the opportunity arises I could create a training
module for
gforth and ARM systems for some Dutch universities.
Best regards,
Jelle
The gnu gforth website does not work very well on my system:
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.1) Gecko/2008071618
Iceweasel/3.0.1 (Debian-3.0.1-1)
http://www.gnu.org/software/gforth/#introduction
http://www.gnu.org/software/gforth/#downloading
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Joel Rees
(waiting for a 3+GHz ARM processor to come out,
to test Steve's willingness to switch again.)
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