This talk of timing belts has prompted me to post about the one in the
HP9845 internal thermal printer (one of those machines is in many bits on
my bench at the moment...), Fortunately I am not looking for a
replacement belt -- I say 'fortunately' because I've enver seen anything
like it.
There are 3 sporckets. One on the stepper motor spindle at the back. One
on the platten spindle. One on the feed roller spindle. The first 2 are
conventioally driven by teeth on the inside of the belt. The last goes
against the outside of the belt and engages with teeth there (of the same
pitch as the intenral ones). Of course that means it turns the opposite way.
I've never seen a betl with external teeth in anything else (although I
have seen a chain drive with sprockets engaging on both sides).
I think I mentioned that the printhead in this printer can be taken
apart. It consists of a coonventioal PCB to link to the cable harness, 7
ceramic hybrid circuits that contain the printhead drivers (and
serial-parallel shift registers), the printhead hybrid iteslf and a load
of zebra-strip like connectors to link everything together...
-tony
I got this via email late yesterday:
"Would you know of anyone that would be interested in a DEC PDP11-34? We
just got one in stock and I can provide you with pix and a list of the
boards inside if you need."
So, if you might be interested in the 11/34 please let me know and I'll
put you in touch with the seller.
Email me webmasterNOSPAM(a)vintage-computer.com
Happy Holidays!
Erik Klein
www.vintage-computer.com <http://www.vintage-computer.com/>
www.vintage-computer.com/vcforum
The Vintage Computer Forum
Does anyone have any info/documentation on the XXDP diagnostics for older PDP-11 systems and peripherals? I'm looking in particular for the 11/40 (11/35), RK05, DZ11, RL02, MM11 core memory, RX01, RL01 diagnostics. I have found some info on Henk's site, but would like to know if anyone has a comprehensive list and hints on how to run these, what the output means, how to answer the prompts, etc.
I have created RL02 packs with XXDP 2.5 and XXDP 2.2 and I can boot and run stuff from these packs. It appears that the 11/40 diagnostics are on XXDP 2.2, but not on XXDP 2.5. I have an old 1976 DEC field rep troubleshooting guide that refers to various MAINDECs, which seem to have been the diagnostics prior to XXDP. Is there a list somewhere showing what the XXDP equivalents of the old MAINDECs are?
Any help would be appreciated. I want to exercise my 11/40 and attached peripherals and see if any subtle gremlins are lurking anywhere within. Everything appears to be working perfectly with the exception of one of my three RK05 drives that I knew was problematic.
Ashley
4416-16
probably 16 sector. if they are 5440 (RL02-looking) probably
not that interesting, but if they are 2315 (RK05-looking) the pdp8
guys will want them.
>From: "Tom Jennings" <tomj(a)wps.com>
>
>Using minicom on linux. XMODEM protocol failed; not sure what
>the problem is. Possibly minicom's XMODEM doesn't do checksum
>xmodem, only crc, my program (telink) doesn't do crc. So I did
>everything as ASCII.
>
---snip---
Hi Tom
I recently used Xmodem from Windoz and found that
the binaries didn't work with the ascii handshake
turned on. It worked fine with the setting for no
handshake at all.
Dwight
> On Fri, 24 Dec 2004, Roger Merchberger wrote:
>
> > Rumor has it that Eric Smith may have mentioned these words:
> > > > How old is google anyway? Presumably it'll be on topic
> in a year
> > > > or two? ;)
> >
> > Doubtful, Yahoo's only 10 years old, according to one
> reference - and
> > it even includes what Yahoo originally stood for:
> >
> > http://www.webmasterworld.com/forum9/5082.htm
> >
> > When this list was started, AltaVista was king with Yahoo not far
> > behind, IIRC; Google didn't come around for a few years after that.
>
> Interestingly enough, we first learned about Google from
> someone posting a message to this list about a "new
> experimental search engine". I wish I could find that
> message to see who it was that posted it. It would have been
> back in 1997 or 1998.
>
> --
>
> Sellam Ismail
If you search it on the Wayback Machine the earliest date it gives is
11/11/98, which takes you here:
http://web.archive.org/web/19981111184551/http://google.com/ and gives
you two links to a search engine "prototype." Clicking on the first of
them takes you here:
http://web.archive.org/web/19981111183552/google.stanford.edu/
Note the stanford.edu address.
-W
If
A couple of good auction finds at the U of A. tuesday:
A DECWriter Correspondent which is a somewhat portable printer/terminal. This
one was the model B which doesn't have the acoustic coupler, but has the
internal modem and a 9600 baud EIA port. What was great about this find is
that it came with the origianl Digital brown canvas traveling case and all the
documentation (Operator's manual, reference cards and Programmer's manual)
plus a spare ribbon cartridge. It is really, REALLY, clean. with absolutely no
wear on the keypads and NO discoloration of the plastic, which make me believe
it wasn't used recently, or at all! I was amazed about the ink ribbon, when I
did run the print test the text was nice and crisp. Remember this is SE
arizona where it is drier than a celebrity at the Sierra Tucson detox clinic.
This is a circa 1982 machine too!
The other find was a Heathkit H-19 terminal which I promptly sold to another
fellow collector.
The last was a 10 year old, big, Emerson UPS, model AP115 (1.5 KVA, 1050
watt). It unfortunatly, did not have the batteries, but was in working
condition and for $2.50, I couldn't resist. I think it has a 96 volt capcity
and looks like it can hold quitea few of the small 12 volt VRLA batteries. It
had two heavy duty cables exiting the bottom of the case which leads me to
believe it might have had an external battery case. I'm trying to find some
documentation, any help would be appreciated.
Cheers
Tom
--
---
Please do not read this sig. If you have read this far, please unread back to
the beginning.
I could use some RL02 packs. Could pay, say $5 each? How many do you have.
Thank you,
Shannon Hoskins
-----Original Message-----
From: William Donzelli <aw288(a)osfn.org>
Sent: Dec 15, 2004 12:56 PM
To: cctalk(a)classiccmp.org
Subject: Stuff for sale, cheap
I picked up the pile of DECstuff located in White Plains, NY the other
night, and most I really don't want. I am keeping the rack, PDP-11/23,
RL02s and some packs, and maybe a VT100, but the rest I don't need. So
here it goes, cheap:
(many) RL02 disk packs (some I think have MUMPS stuff)
(2 or 3) LA50 printers (little desktop things)
(2 or 3) VT100oid keyboards (may have missing keycaps)
Make silly offers for this stuff - just give me something for my
time and gas fetching the stuff. Shipping is from 10512.
Come to think of it, someone local could probably easily talk me out of
the whole pile. I must say it is not too pretty.
Unrelated, I also have an ancient video game - one of those analog/digital
hybrids (ping/squash/practice/soccer - the ultra cheesy games from the
mid 1970s). It is a Bentley Compuvision. The paddles are included, but
one is missing the knob (the pot shaft is still there). I was told it
still works, but did not try it out. Also accepting silly offers for the
thing.).
Oh, and I also see I have a tube of Altera EP610SC-15 EPLD chips. These
are surface mount - I assume unblown, but can't be sure. 17 chips is
all. Same deal.
Please reply off list.
William Donzelli
aw288(a)osfn.org
