'Interesting overview, but I have my doubts about its accuracy. Lisp
seems to have been too popular in the mid-1980s, and at the same time
he claims that Ada was the most popular language. Both seem highly
unlikely to me. '
fully agree. I never saw a lisp, ada job offer!
In the mid/late 1980s pascal and C were popular languages, whereas therestill were lots of cobol/fortran, mostly cobol, job offers.
Inventor of the Z3 (arguably the world's first programmable computer), we
lost it in the 1943 Berlin bombing; we lost the inventor himself in 1995
on this day.
How things could be different...
-- Dave
Ken Iverson was given unto us in 1920; a pioneer in computer science, he gave
us APL (actually not a bad language; it was, err, *concise* and grew on you
after a while[*]) which was used to develop the microcode for the /360 series.
[*]
My brother (a car freak) knew that I was into computers, and wanted me to work
out the final drive ratios of various gearbox and diff combinations etc. I
blew him away the next day with pages of output (he thought it would take me
ages) generated with a one-line APL\360 program :-)
-- Dave
Around 1997 I and others had a problem with SCO UNIX 3.2V.4.2 on
'faster' Pentium CPUs. Faster defined as probably 200MHz or more.
There were at least two patches as far as I remember and maybe SLS
uod464a.
I didn't look at that time but now I'm wondering if other Unixes had
similar problems. Either commercial versions or free ones.
Anyone here who encountered such problems on other Unixes?
One patch had
"This is due to executing an invalid instruction in kernel mode (trap
6 is for an invalid instruction; a user process which does this will
simply die with a core dump). If your particular problem is a double
panic and it doesn't leave a system memory dump in whatever device
you've chosen for dumps (usually /dev/swap), apply the following
patch.
This is due to a problem in the kernel's querytlb() routine, which may
allow the Pentium to execute a 386-specific instruction which is not
supported on the Pentium. The cure involves patching a kernel module
using _fst. (see part 1 on where to find /etc/_fst). Go into the
/etc/conf/pack.d/kernel directory. We're going to work on locore.o, so
make a backup and then run _fst -w locore.o - The conversation between
you and _fst goes like this (the * is a prompt from _fst; don't type
it or any of _fst's responses):"
https://scofaq.aplawrence.com/FAQ_scotec3ktrap6.html
A second one was
"> Follow the additional instructions below ONLY if you now get
> a k_trap type 0 panic after following the instructions in
> IT os/2366. To correct a k_trap 0, do the following:
>
> # cd /etc/conf/pack.d/pit
> # cp Driver.o Driver.orig
> # _fst -w Driver.o
> * spinwait+2D?w F989 FEE2
> * $q
> # cd /etc/conf/cf.d
> # ./link_unix -y
>
> Reboot your system. The above patch corrects a problem with
> a software delay loop that was optimized out by the compiler
> and which can cause panics on faster processors."
Cheers,
uncle rubl
We gained Rear Admiral Grace Hopper on this day in 1906; known as "Amazing
Grace", she was a remarkable woman, both in computers and the Navy. She coined
the term "debugging" when she extracted a moth from a set of relay contacts from
a computer (the Harvard Mk I) and wrote "computer debugged" in the log, taping
the deceased Lepidoptera in there as well. She was convinced that computers
could be programmed in an English-like language and developed Flow-Matic, which
in turn became, err, COBOL... She was posthumously awarded the Presidential
Medal of Freedom in 2016 by Barack Obama.
-- Dave
On Tue, 10 Dec 2019, G. Branden Robinson wrote:
>> Who'ld've thought that two computer greats would share the same
>> birthday?
>
> Anyone who thinks there are at least 23 greats would bet that way. ;-)
Yeah, I know; I'd temporarily forgotten the Birthday Paradox :-(
-- Dave
> On Dec 9, 2019, at 5:30 PM, Doug McIlroy <doug(a)cs.dartmouth.edu> wrote:
>
> Moo and hunt-the-wumpus got quite a lot of play
> both in the lab and at home. Wump was an instant
> hit with my son who was 4 or 5 years old at the
> time.
>
> Amusingly, I speculated on how to generate degree-3
> graphs for wump, but obviously not very deeply. It
> was only much later that I realized the graph
> always had the same topology--a dodecahedron.
You know, maybe we’ve been looking at this wrong the whole time (I blame Yob).
Maybe the caves aren’t the vertices of a dodecahedron. Maybe they’re the faces of an icosahedron.
Adam
Bit hard to classify this one; separate posts since COFF was created?
Augusta Ada King-Noel, Countess of Lovelace (and daughter of Lord Byron), was
born on this day in 1815; arguably the world's first computer programmer and a
highly independent woman, she saw the potential in Charles Babbage's
new-fangled invention.
J.F.Ossanna was given unto us on this day in 1928; a prolific programmer, he
not only had a hand in developing Unix but also gave us the ROFF series.
Who'ld've thought that two computer greats would share the same birthday?
-- Dave
> From: Lars Brinkhoff
>> PARC's MAXC appears in the mid-1970s.
> Maybe this is a good time to ask if anyone knows whether any of those
> diverse systems has software preserved? Specifically, the
> implementation of the NCP and 1822 Host-to-IMP protocols?
Both MAXC's were PDP-10 re-implementations, and ran TENEX. So the basic
system is still around, not sure if they had any interesting local hacks
(well, probably PUP support; MIT tried to put it in MIT-XX, so it may
still exist on thats backup tapes).
> From: Rob Gingell gingell at computer.org
> A collection of maps of the ARPAnet over time is available from the
> Computer History Museum
Interesting; I also have a large collection of maps:
http://mercury.lcs.mit.edu/~jnc/tech/arpanet.html#Maps
all with hi-res versions (click on the thumbnails). Some of the ones
at the CHM I don't have, but the coverage time-wise is similar.
I also have a modest collection of hosts.txt files, ranging from
Jul-77 to Apr-94.
> I've forgotten at this point whether the assignments were documented in
> RFCs or other assigned numbers documents from the Network Information Center
The first 'Assigned numbers' RFC was #739, from November 1977. It never
contained host addresses. There were a very few early RFC's which contained
host adresses (#226, #229, #236), but pretty quickly host addresses were done
via the hosts.txt file, distributed from the NIC. (Given the churn rate, using
RFC's didn't make sense.) Early RFCs about this are #606 and #627. There were
a bunch of RFC's that reported on 'host status' (e.g. how their software was
doing), but their goal was different.
PS: A number of people are leaving out the definite article before 'ARPANET';
this seems to be popular these days (especially in the UK it seems, not sure
why), but it is incorrect.
Also, the correct spelling is all capitals (check e.g. through old RFCs).
Until of course the AP gets their hands on it (I'm breathlessly awaiting
their announcement that the U.S. President's reference is to be referred
to as the 'white house').
Noel
