24 Apr
2026
24 Apr
'26
1:54 p.m.
It is nice to get back to these old programs.
A few years ago I fixed a bug in an undergrad chess “knight’s tour” program I wrote when I
was about 18. It was written in PL/I.
Last edit: 1978; I happily added “bug fix, 2016”.
I knew of the bug, just never got around to fixing it. I added some printout improvements
too.
I had the Hercules S/360 emulator running. MVS 3.7j I recall. Memory lane trip for sure.
JCL? Had to find my “green book”!
Kevin
Sent from my iPhone
On Apr 24, 2026, at 12:34, Paul Koning via cctalk
<cctalk(a)classiccmp.org> wrote:
On Apr 24, 2026, at 3:26 PM, Brian L. Stuart via
cctalk <cctalk(a)classiccmp.org> wrote:
Very cool. A while back, I resurrected one of my senior
projects from 1984, a little Forth-based OS for the PDP-11.
It was originally implemented on an 11/34 with an RK05,
but now I've got it on a little LSI-11 in a BA11-VA box
with a little 6809 board I build and wrote a TU58 emulator
for.
I recently started playing a lot more with Forth. The main reason is that I ran into a
very nice extended Forth system for the Raspberry Pico, which makes for a much nicer
development environment than the vendor-supplied C API. It's a bare metal system,
implemented mostly in Forth with the low level bits in assembly language. No C or C++
anywhere.
https://github.com/tabemann/zeptoforth
It does networking, too. I've been using it to develop a nice NTP server (and
disciplined oscillator), very nice and small.
paul