15 May
2014
15 May
'14
5:19 p.m.
Just a little bit of cursory looking turned up nothing. Has someone written
a Forth interpreter for PDP-8? Preferably using 24-bit integers, but I'll
take what I can get. OS/8 support would be nice.
I see that a Lisp interpreter exists, so that's somewhat promising, I
suppose.
Thanks,
Kyle
15 May
15 May
6:06 p.m.
On Thu, May 15, 2014 at 10:19:31PM +0100, Kyle Owen wrote:
Just a little bit of cursory looking turned up
nothing. Has someone written
a Forth interpreter for PDP-8? Preferably using 24-bit integers, but I'll
take what I can get. OS/8 support would be nice.
Wasn't there a FIG FORTH for the '8? I could have sworn there was.
I started my own version for TSS/8, ~30 years ago, but never finished
it because my RS08 crapped out. Would have been nice to finish that.
12-bit only, though.
http://www.dbit.com/pub/pdp8/tss8/forth.pal
It's barely a start and it's a mess (I was just a kid). Definitely look
for FIG.
John Wilson
D Bit
6:45 p.m.
On Thu, May 15, 2014 at 11:06 PM, John Wilson <wilson at dbit.com> wrote:
Wasn't there a FIG FORTH for the '8? I could have sworn there was.
I've seen it for the -11 (and NOVA), but nothing yet for the -8.
I started my own version for TSS/8, ~30 years ago, but never finished
it because my RS08 crapped out. Would have been nice
to finish that.
12-bit only, though.
http://www.dbit.com/pub/pdp8/tss8/forth.pal
It's barely a start and it's a mess (I was just a kid). Definitely look
for FIG.
Cool! It sounds like a good inspiration for me to get started on a 24-bit
version.
Kyle
6:25 p.m.
From: Kyle Owen: Thursday, May 15, 2014 2:19 PM
Subject: Forth for PDP-8?
Just a little bit of cursory looking turned up
nothing. Has someone written
a Forth interpreter for PDP-8? Preferably using 24-bit integers, but I'll
take what I can get. OS/8 support would be nice.
I found this...:
http://www.dbit.com/pub/pdp8/tss8/forth.pal
and several other folks looking over the years. This also looked promising:
http://computer-programming-forum.com/22-forth/a8df1b276ff88c06.htm
Vince
7:09 p.m.
On May 15, 2014, at 17:19, Kyle Owen <kylevowen at gmail.com> wrote:
Just a little bit of cursory looking turned up nothing. Has someone written
a Forth interpreter for PDP-8? Preferably using 24-bit integers, but I'll
take what I can get. OS/8 support would be nice.
I don't know of any off hand, but I will say that building your
own Forth kernel from scratch is actually a lot of fun.
If you ever have the time, try it!
- Dave
8:58 p.m.
On May 15, 2014, at 7:09 PM, David Riley <fraveydank at gmail.com> wrote:
On May 15, 2014, at 17:19, Kyle Owen <kylevowen at
gmail.com> wrote:
Indeed. I?d suggest starting with the PDP-11 Fig-Forth implementation. Very little of that
is machine code, so if you rewrite those little bits in your favorite assembler, the rest
should just run without change.
paul
Just a little bit of cursory looking turned up nothing. Has someone written
a Forth interpreter for PDP-8? Preferably using 24-bit integers, but I'll
take what I can get. OS/8 support would be nice.
I don't know of any off hand, but I will say that building your
own Forth kernel from scratch is actually a lot of fun.
If you ever have the time, try it! 
16 May
16 May
4:18 p.m.
Indeed. I?d suggest starting with the PDP-11 Fig-Forth implementation.
Very little of that is machine code, so if you rewrite those little bits
in your favorite assembler, the rest should just run without change.
Are hte old FIG Forth listings available on-line anywhere? From what I
remember they were public domain so there shouldn't be any problems in
making them avaialble, but I couldn't obivously find them.
-tony
10:43 p.m.
On Fri, May 16, 2014 at 2:18 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
Are hte old FIG Forth listings available on-line
anywhere? From what I
remember they were public domain so there shouldn't be any problems in
making them avaialble, but I couldn't obivously find them.
Alas, FIG is no more, though SVFIG and UK FIG are still around. SVFIG runs
the forth.org site, and has scans of the FIG-Forth implementations there:
http://www.forth.org/fig-forth/contents.html
They have various other useful stuff also, including scans of Forth
Dimensions:
http://www.forth.org/fig-forth/contents.html
17 May
17 May
2:39 p.m.
Alas, FIG is no more, though SVFIG and UK FIG are
still around. SVFIG runs
the forth.org site, and has scans of the FIG-Forth implementations there:
http://www.forth.org/fig-forth/contents.html
They have various other useful stuff also, including scans of Forth
Dimensions:
http://www.forth.org/fig-forth/contents.html
Thanks, that looks very interesting. I think i'll spend many happy hours
reading those lisitngs.
-tony
16 May
16 May
2:10 a.m.
Kyle Owen writes:
Has someone written a Forth interpreter for PDP-8?
Not yet. I was kinda planning to support all the PDP families, but
haven't got very far.
http://github.com/larsbrinkhoff/lbForth/blob/master/targets/pdp8/nucleus.fth
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