Hoping someone has some spare rackmount parts.
For my 8/E, it was pulled out of a rack, so it just needs the
parts that are inside the rack -- approximately 1+3/4" high
sliders; my /E has the part that goes *into* the sliders.
For my 8/M, it needs the complete rack kit, as does my 11/20.
Anyone able to help out?
Thanks in advance,
-RK
--
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Consulting and Training at www.parse.com
Looking for Digital Equipment Corp. PDP-1 through PDP-15 minicomputers!
Everything works but the floppy drive.
Don't know if it is the controller or the floppy drive.
Anyway it is in my closet taking up space.
______________________________
Respectfully and with my best regards,
Sidney B. Nice
sidneyb(a)vonl.com
Hello:
Let me chime in on the number of Mark-8 computers, etc. Several years ago I
went through some old records that showed the royalties paid to me by both
Radio-Electronics magazine and Techniques. R-E paid a small royalty for
each of the instruction booklets they sold. You may recall the original
magazine article could not hold all the information and construction
details. Techniques paid a royalty on the sets of printed-circuit boards
(PCBs) they sold. Based on the information I still have, I figure R-E sold
about 7500 copies of the booklet, and Techniques sold about 400 sets of
PCBs.
Unfortunately, the original R-E article and the booklet failed to publish a
key piece of information: the wiring diagram for the board-to-board
connections. So, I heard from many people who needed this information, but
these communications took place before email and low-cost fax, so I have no
record nor recollection of how many people I spoke with.
As you can probably guess, I also have no idea how many people actually
built a Mark-8, nor do I know how many of those built systems still exist.
My original Mark-8 is in the Smithsonian, and it was in working condition
when it left here, so that counts as one system. The prototype memory board
for the original point-to-point wired Mark-8 prototype went to the American
Computer Museum in Bozeman, MT in October. The ACM also got mimeographed
copies of the original "Mark-8 Newsletter" and its successor, the "Micro-8
Newsletter."
If anyone has questions about the Mark-8, refer to the Web site:
http://www.his.com/~jlewczyk/adavie/mark8b.html
which contains information I wrote back in 1999. (I need to go back and
clean it up a bit.)
Please note, the email addresses in that posting are incorrect. People can
reach me at the permanent email addresses:
KZ1G(a)ARRL.NET
or
jontitus(a)hendrielane.com
For a while longer, the jontitus(a)attbi.com email still works. We expect a
shift to comcast.net sometime soon, though.
Cheers,
Jon
Jon Titus
36 Sunset Drive
Milford, MA 01757-1362 USA
Phone: +1-508-478-8040
E-mail: jontitus(a)attbi.com
Member, National Association of Science Writers
Hi
I guess the next question is, does anyone have the
dumps of these chips or what the new mapping is??
I suspect that there is some remapping of the memory
and some for the I/O. I don't know why it would take
3 chips though. I'll have to dig through my stuff to
find a schematic. I may be able to figure it out from there.
Dwight
>From: "Patrick Rigney" <patrick(a)evocative.com>
>
>> > > Tony, out of curiousity, what are your versions of the
>> various PROMs and
>> > > EPROMs at U516, 517, 518, and 520 on your Z90?
>> >
>> > That would involve getting to the Z90, which is not going to be
>> > trivial....
>
>FYI, I found this while trolling through some links on retroarchive.org.
>Excerpt (edited) from an Arpanet message dated 17-feb-1984:
>
>"When I ordered CP/M the first time and it didn't work, I called
>Heath and they said "Oh, yeah, you need a hardware upgrade!"
>So I did the following:
>
>1) Replaced the 444-42 in U517 with a 444-66
>2) Connect a jumper from the middle pin of U503 to pin 17 of P509
>They assured me this would work. However, to make the full upgrade,
>I could also do:
>3) Replace the 444-40 in U518 with a 444-62
>4) Replace the 444-43 in U550 with a 444-61
>If I did this, I would lose cassette capability. Since this wasn't
>necessary (they said) I decided to just do 1 & 2.
>
>When I did this and it still didn't work, I called Heath again. They
>said it should have worked and my disk must be bad. So they sent me
>a new disk..guess what, still didn't work. Then they say hardware
>problem with the disk drive. That's when I put my problem on the net.
>Mr. D. C. Finch of Phoenix was kind enough to write me a letter
>(they have R/O access to the net) which told me that indeed 3 & 4
>were necessary (at least for CP/M 2.2.03 and later). So this morning
>I called Heath again and they said, "That's right, you have to replace
>all three chips!" Just wish they had said that back in November!!
>I'll be happy to give anyone the details of Mr. Finch's letter if
>asked, I don't think most people are that interested.
Mike Davis,
You probably already have an answer on your question about a ribbon for the
Juki, but on the rare chance you haven't:
Ribbons for the IBM Selectric II work on the Juki. Some of the newer ribbons
tend to snag about half way thru and I have to remove the old ribbon half and
attach the new to make the ribbon work.
I'm trying to find a driver for the Juki to install on newer word processors.
Bill Lllewellyn
God bless you John!
Mine has just started having paper getting stuck on the "teeth roller"
underneath the larger one next to the green felt "hot" area. It needs a new
smaller roller cause worn out. There are a number of rollers that look like
this, how do I tell which one it is in order to order the right one?
Thanks very much.
Somewhere down the line I'll return the favor.
Regards,
June
Dear Andreas,
I found your message;
http://www.classiccmp.org/pipermail/cctech/2002-December/005834.html
I wondered whether you would be willing to give me a copy of your 'V-Tel'
client? I've been looking for something to Telnet into a mail server using
the PsiMail Internet TCP/IP stack, but all I've found so far is
alpha-quality Telnet clients. I would be very grateful if you could help.
Regards,
Alex
Alex Cruickshank
12 Barton Way, Croxley Green, Herts., WD3 3QA, UK
+44 (0)1923 773112
acruicks(a)cix.co.uk
Does anyone have a favorite Windows based terminal emulator?
I've been evaluating several but I haven't come across any with every
terminal I'd like to emulate and every feature I've been looking for.
Tiger Term - http://www.tigerterm.co.uk <http://www.tigerterm.co.uk/>
is my current favorite but it's missing a few terminal emulations that
I'd prefer (VT100 being the most important).
Any package I consider would support most vintage terminal types and
ascii file transfers as well as a few more common protocols (XModem,
Kermit, etc.)
So, does anyone have a favorite for when they aren't firing up there
ADM3A or VT52?
Erik
