HP 21mx/whatever processor works with doublesided key... i forgot model#
COURYHOUSE at aol.com
COURYHOUSE at aol.com
Fri Oct 20 22:23:33 CDT 2017
NOPE NOT A BIG RTE PERSON - BUT YES THERE WOULD BE MULTI SERIAL
BOARDS IN SOME INCOMING PROCESSORS
RAN IT ONCE AND PLAYED WITH IT...
BROKE 1000 SYSTEMS DOWN AND SOLD THE PIECES. THE ONLY SYSTEMS THAT WE
SUPPORTED SOFTWARE WISE WERE F AND THEN ACCESS
THIS 21 WHATEVER IS THE SKINNY ONE! DOUBLE SIDED KEY - AND IF I
REMEMBER WILL YANK IT UP OFF THE FLOOR IN MY OFFICE TOMORROW AND SEE THE #
BUT SUSPECT 2108 AS
ABOUT ALL I REMEMBER LIKING ABOUT IT WAS IT HAD THE BOOT BUILT IN
WHAT I DID NOT LIKE WAS IT WAS NOT CORE MEMORY.
SURE WERE FUN TIMES...
ALTHOUGH THERE WAS ALWAYS A FOND SPOT FOR THE 21XX STUFF... I GOT
REALLY OCCUPIED WITH THE 3000 AS A COMPUTER THAT I WOULD REALLY USE. IN THE
EARLY DAYS OF RUNNING THE ACCESS THOUGH WHAT GREAT FUN AND THE
100 BOARD BBS/MULTI USER CHAT/VOTE AND POL/EMAIL AND MOST GAMES WE DID
GOT MOVED TO THE 3000.
ED - WHOSE KEYBOARD THINKS IT IS AN ASR 35 TELETYPE SO THAT IS HOW THE
REST OF THE MESSAGE GOT FININSHED
In a message dated 10/20/2017 7:37:48 A.M. US Mountain Standard Time,
jwest at classiccmp.org writes:
HP 21mx/whatever processor works with double sided key... (I forgot
Given the way you phrased it, the correct replacement for 'whatever' is M
series. E and F never used the double sided key.
However, even that is not entirely correct. Older M's used the double sided
key. Later M's used the single sided key that is the same as the E and F.
It has ... of all things 3 tty boards in it? what is with that? Multi
user without a mux?
Didn't you sell and support these things in a prior life? It was always far
more common to see the 21MX machines with 'discrete' tty boards rather than
muxes. There were only two mux boards, the one in 2000/Access which was
uncommon as far as 21mx's go... and the one that RTE commonly used which
also not super common to find in the wild. If you had a mux board, then I
would have been a bit surprised. Multiple tty boards? Not surprised, that
was the far more common thing.... more often than not, the 21mx's weren't
really used/targeted for multiuser (except 2000 TSB of course). RTE did
multiuser well, but... still was probably most often used in situations
really didn't require it. Mux's weren't super common.
Has 2 memory boards think I remember 64k total.
64kb or 64kw? Remember, the M.E.M. option is required to support more than
32kw. On the M, MEM was optional. I believe it was standard on E & F.
need to find a paper tape basic to play with.
There are plenty of those floating around. Google is your friend... I think
MU-BASIC may have been the one I heard people using? See below for a better
Any other advice?
You should probably start by reading an introduction to the 21MX to get
basic background on the machines...
Go to: http://www.hpmuseum.net/exhibit.php?hwdoc=108
You should start with 02108-90004 followed by 02108-90002
Finally - for you (and anyone else) that has just a cpu or a cpu and
peripherals, the best thing you can use to play with the machine is Terry
See http://www.infionline.net/~wtnewton/oldcomp/hp2100/ and
Yes, you can run BASIC like you mention above. But it is a very well done
"Forth-like" system that is well developed/flushedout. So in addition to
BASIC, you get oh-so-many-wonderful-things. I very highly recommend that
anyone messing with 21mx/1000 systems take a good look at HP-IPL/OS.
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