I need to bring up a 11/20 shall I use a variac!?
added core.... where can I find if I decide to add to it?
ed sharpe _www.smecc.org_ (http://www.smecc.org)
I'm looking for any of these, starting with most essentially the backplane.
power supply next, then frame if anyone has one that is empty looking
for some filling.
Thanks
Jim
CBM15 V012 has been released to CSDB, and is currently available for
download.
http://csdb.dk/release/?id=143468
CBM15 is a telecommunications software, that facilitates direct two-way
communications between a Commodore 64 computer and a Teletype Corp. M15KSR
(or any other compatible machine).
Note that CBM15 follows the 5/N/2 serial protocol, at a fixed line speed of
45.45 baud (22mS signalling period). As with any of these PC-to-TTY setups,
an external RS-232 to Current Loop converter is required. This is an
initial release, and upcoming releases will add new features and correct a
bug or two.
So.. am I the only one on the list(s) with a C-64 and an M15 on hand? If
you have the required hardware, please give it a try - so far, I've had no
feedback from any other 'real' M15 owner..
Thanks!
I used my PDP-8/e at home to test the RX8E controller and the RX01 floppies
that came with the PDP-12. Both worked OK.
We found a bad SP380 on a M7102 board in the DW8E the Omnibus expansion
chassis. This would not let the SKIP instructions work with the RX8E, RK05,
or PC8E. Once we replaced the SP380 we were able to boot OS/8 from an RX01
floppy. This may be the only PDP-12 to ever do that.
--
Michael Thompson
This is a funny cartoon and subsequent discussion thread from the
Multics discussion group about emacs.
Names and personal info edited out due to archival by unknown parties of
the list and that these folks might not want names and certainly not
email addresses archived. Mentioning that not as a criticism, just to
explain the format. I also edited the thread back to bottom posting.
Original XKCD cartoon link.
https://xkcd.com/378/
>> From: Multicians <snip>
>> Subject: Re: [multicians] Emacs humor
>>
>>>
>>>
>>> Thanks, Gary. As an emacs diehart, I fully appreciate that. In
fact, there is a silly phrase that many emacs users use, when referring
to all the obscure key bindings that you get by default with emacs, or
can create. It.s called:
>>>
>>> Control-Meta-Shift-Cokebottle
>>>
>>> I believe the history (someone can correct me if I.m wrong) is that
Emacs was developed at the MIT AI Lab (by Richard Stallman) and
initially written in Teco. It was developed on Lisp machines, which
sported lots of modification keys on its keyboard. These included
Control, Shift, Hyper, Meta, Super (and perhaps more). Naturally, emacs
took advantage of some of these . at least those that were available on
multiple terminals or could be emulated on lesser terminals. I remember
when I worked at MIT LCS (down the hall from MIT AI), we had a key
binding on our Lisp Machines that called the elevator to the 8th floor.
I don.t remember the key binding, but I.m sure it used a few of these
modification keys (and probably .e. for .elevator. as the modified key).
In any case, the class of these funky key bindings was referred to as
Control-Meta-Shift-Cokebottle.
>>>
>>> I.m sure I.ve gotten some of the facts wrong, but I.m also sure
that at least someone on this list will correct me!
>>>
>>> . Eric
>>
>
>
>> On Dec 1, 2015, at 11:30 AM, Ken <snip>> wrote:
>>
>>
>> I seem to recall that one of the Lisp machine keyboard modifiers was
"Top", and that the phrase was therefore
>>
>>> Control-Shift-Meta-Top-Cokebottle
>>>
>> Where, of course, you were typing the "Cokebottle" key with the
Control, Shift, Meta, and Top modifier keys depressed.
>>
>> I think the elevator hack involved the AI Lab PDP-6 (or maybe,
later, PDP-10), but I wouldn't be surprised if it migrated to the Lisp
machines, too The old -6, especially, had added hardware to enable it
to control the various robot devices the AI lab played with. Some AI
Lab hardware guys gained access to the machinery room on the 10th floor
and added some extra relay circuitry to one of the elevator controllers,
and it wasn't much of a stretch to run the control wires down to the 9th
floor machine room. IIRC it took a few years for whatever company was
responsible for maintaining the elevators to discover the unauthorized
modification and remove it.
>>
>> How long it stayed removed is an entirely different question, of course.
>>
>> Ken
>> MIT-LCS '72-'80
>> Multics ARPANET software
>>
On 12/1/2015 11:42 AM, Eric <snip> [multicians] wrote:
>
>
> I just knew I had that facts wrong! Yes, you.re right. I remember the
Top key now.
>
> I do know that the elevator hack worked on Lisp machines, but I think
you.re right that it also worked on some other interfaces. I remember
getting frustrated when I.d be .ready to leave. (at 2am, or so), and
would call the elevator, and then I.d have to fix .one more bug., and by
the time I got to the elevator, I actually had to push the boring old
button to get the elevator doors to open! :-)
>
> . Eric
A colleague and I are working on getting our respective Fabritek MP-12s
working. The MP-12 is an industrial-looking computer with a very limited
front panel (deposit doesn't increment PC...gah!) but does emulate most
respects of a PDP-8. So far, we've been able to find the device codes for
updating the 7-segment LED displays on the front, turning on and off
relays, and setting some arbitrary open-collector outputs. It appears as
though there is no serial port option on ours, which is unfortunate.
There are three 512-by-4 bipolar (configured as 512-by-12) PROMs that seem
to override the core memory at the top of the 4k field. If the PROM's value
is 7777 octal, the core memory is accessible. Otherwise, you're stuck with
ROM, best I can tell.
We've dumped the ROMs to verify, but here's the code I've backed out of
them, disassembled and labeled where appropriate:
*7756
TEMP, 7755 /NOT IN ROM
CLA HLT /7602
ADDR, 7755 /7755 STARTING ADDRESS?
START, TAD ADDR /1360 GET STARTING ADDRESS?
DCA TEMP /3356 SAVE TEMPORARILY
LOOP, RRB /6012 GET CHAR
CLL RTL /7106
RTL /7006
RTL /7006 ROTATE SO BIT 0 IS IN BIT 7, BIT 4 IN BIT 11, ETC.
6015 /6015 SKIP ON FLAG?
JMP .-1 /5367
SNL /7420 SKIP IF LINK IS SET (BIT 6 OF PAPER TAPE IS SET)
JMP LOOP /5363
DCA I TEMP /3756
ISZ TEMP /2356
JMP 7755 /5355
7776 /NOT IN ROM
JMP START /5361
$
The "NOT IN ROM" indicates that the ROM's value is unprogrammed, so that
you can in fact access those core locations. The values I've provided just
happen to be what's in my machine's memory at this time.
It looks a lot like a RIM loader, except I can't figure out for the life of
me what the format should look like. Best I can tell, if RRB ORs the read
buffer with the accumulator, you'll never be able to send anything but
patterns matching (data & 7737). At least, that's what I've simulated. Due
to the fact that they're clearing the link after the second go around,
you'd be losing one bit of data.
So, maybe this isn't really a program loading routine, but rather just
something to store 8-bit values in core? Any other ideas?
Thanks,
Kyle
Dear List
While the silk screeners process the panels I have a
couple of days for a little project
I have a TU-58 and yes it had gooey drive wheels.
Now it no longer has that problem but I have black and gooey fingers.!!!
I know this issue has been addressed before.
So I think somebody must know where I can get the right tubing to
replace the degraded stuff.
The drive hub is 0.42" and the rubber bit was 0.62" o/d
A UK source would be nice,
Rod
The chances are slim, but someone may know someone... feel free to
contact me off-list.
I have a CM-200A; the smallest 'classic' CM machine. I've started a
project, with some ex-TMC people (notably the designer of the
beautiful chassis the CM machines came in, Tamiko Thiel) to get my
machine operational next year, for the 30th anniversary of the launch
of the CM.
Unfortunately we've hit a complete show-stopper right off the bat. My
machine has a complete set of compute node and I/O boards, but is
missing the crucial 'NX' board; the board in the CM that interfaces to
the front-end.
See: http://www.corestore.org/cm2a.htm
I need to locate one, or we're dead in the water. I *know* there are
people out there who keep a very low profile and have CM hardware
squirreled away in their basements. Another possibility, perhaps the
best, is to *borrow* an NX board from a non-functional machine in a
museum collection, something that will never be more than a static
exhibit.
Anyone in a position to help or advise, please get in touch. I'm
reaching out to former TMC staff and customers by various other
routes, but someone here may know something.
Thanks
Mike
http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'
Great!
We take it off list from here.
Very nice work on the HP by the way!
/Anders
> Date: Wed, 2 Dec 2015 21:04:55 +0100
> From: Rik Bos <hp-fix at xs4all.nl>
> To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org>
> Subject: RE: TU-58
> Message-ID: <dc985939bd791910a6b715f873573a15 at smtp-cloud3.xs4all.net>
> Content-Type: text/plain; charset="utf-8"
>
> Anders,
>
> I can fix them, if you look at my Flickr page you can see some examples of
> new capstans I made.about halfway the site.
> www.flickr.com/hp-fix
> And of the HP3000 ;)
>
> -Rik
