sounds like a good reason to have a rom cloning party too! Ed#
_www.smecc.org_ (http://www.smecc.org)
In a message dated 9/25/2016 6:08:39 P.M. US Mountain Standard Time,
aek at bitsavers.org writes:
I picked up a 700/60, the ANSI version of the HP 700-series terminal and
when I took it
apart to clean, it had a VDC 1401DP31BE inside. I swapped the CRT into a
700/92 which
has a slightly different board, and a burned in amber tube, and it worked
fine.
Also I noticed the 700/96 PCB is almost identical to the 700/60, so I'll
try a
rom swap to see what happens.
Too bad there aren't generally available cross reference list for terminal
CRTs.
FWIW, the 700/96 has a Philips M32ECD3G CRT.
VDC is having a "sale" on the 1401DP4 and P31. The tube price is pretty
cheap but the
shipping is about double when you price it against their normal $55 price.
The shipping
goes down with quantity, so if you buy 5 or so it ends up being about $25
a tube and
significantly cheaper than all of the ones listed on eBay.
> If your CPU is an 11/73 (which can directly 'access' [hate that verbism
> :-] all of memory from ODT, unlike the 11/23 which is restricted to the
> bottom 256KB), try playing around with a failing location, and its
> alternative, directly, and see if a store of random data into one can be
> read back directly from the other
Note: The 11/'73' CPU powers up with the cache enabled, even for ODT!
So if you write xxx into some location, if you then read it back, you will get
the correct data even if the memory location is busted - the CPU is getting
the (correct) data from the cache. To have your 'memory' reads and writes
actually go to the memory, you need to turn off the cache:
17777746/ 02000
Note that starting the machine does an INIT, which will again enable the
cache.
> I'll start the Computer History wiki page for this board with that info.
Started:
http://gunkies.org/w/index.php?title=CMV-4000
Currently has only the memory chip info, I'll add the config stuff as I get it
doped out.
Noel
Does anyone know of documentation for the HP9895A format with its own M2FM encoding?
I have a kryoflux preservation stream but so far can make no sense of it.
Denise
________________________________
I've got quite a stack (more than a dozen) first-generation DOS laptops that
are headed for the recycler unless someone wants them. They re mostly
Toshiba T-1000 or T1000SE units, but there's a Tandy in there also, and
probably a another outlier or two. There are also a few Portege's running
Win-95, and a few fabric laptop cases. At one time all of these worked
(obviously), but I'm sure that most don't now, for various reasons. A few
may have been cannibalized a bit, but for the most part all the parts are
there.
I'm not looking for any cash for these, but I don't want to pay anything
(like shipping) either, especially since the electronics recycler is less
than three miles from my house. If anyone wants to pick these up (I'm in
San Carlos, near Redwood City, CA), or wants to pay me to ship them (at cost
only), let me know. At the end of this week (01-Oct-2016), they'll be
gone...
~~
Mark Moulding
-----Original Message-----
From: cctalk-request at classiccmp.org
Sent: Sunday, September 25, 2016 10:00 AM
To: cctalk at classiccmp.org
Subject: cctalk Digest, Vol 27, Issue 24
Send cctalk mailing list submissions to
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To subscribe or unsubscribe via the World Wide Web, visit
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of cctalk digest..."
Today's Topics:
1. MSI Texscan SpectraGen SG4B (Jim Brain)
2. Re: DEC TC11 maindec listings? (Al Kossow)
3. Re: DEC TC11 maindec listings? (Don North)
4. Re: DEC TC11 maindec listings? (Mattis Lind)
5. Electronic surplus in the southwest (William Maddox)
6. Re: Decoding kryoflux stream for HP9895A (Eric Smith)
7. AC Filter Cap Brand Recommendations (Craig Ruff)
8. Re: AC Filter Cap Brand Recommendations (Peter Cetinski)
9. Re: AC Filter Cap Brand Recommendations (Chuck Guzis)
10. Digital Storage Architecture - Media Format (Rob Jarratt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Sep 2016 19:50:56 -0500
From: Jim Brain <brain at jbrain.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: MSI Texscan SpectraGen SG4B
Message-ID: <b689fdda-69db-57fd-9874-67476dd62c26 at jbrain.com>
Content-Type: text/plain; charset=utf-8; format=flowed
I know it's a long shot, but does anyone have a manual for a SpectraGen
4B Video Title Generator? I am trying to resurrect one, and it seems to
be a Z80-based unit.
Jim
--
Jim Brain
brain at jbrain.comwww.jbrain.com
------------------------------
Message: 2
Date: Sat, 24 Sep 2016 20:32:57 -0700
From: Al Kossow <aek at bitsavers.org>
To: cctalk at classiccmp.org
Subject: Re: DEC TC11 maindec listings?
Message-ID: <1fe8bb6e-28bd-c997-c52c-f6ddb9e26b98 at bitsavers.org>
Content-Type: text/plain; charset=utf-8
I had it on fiche, which I scanned this afternoon.
It should be up on the bitsavers mirrors by morning PDT under pdp11/xxdp
along with rev E of the XXDP+ users guide.
I'll probably also do the RX02 diags if I can find them for Don, though
he may have them on fiche.
The step and repeat fiche scanner isn't on line yet so I used the Canon
manual positioning one. It's tedious, and it gets out of focus easily, but
they are better than nothing.
On 9/21/16 12:38 PM, Mattis Lind wrote:
> I have been looking for TC11 maindec listings in the usual places, but
> didn't find any. I think they should be named ZTCA, ZTCB, ZTCC, ZTCD and
> ZTCE.
>
> Does anyone know of an online location or happen to have an offline paper
> original?
>
> /Mattis
>
------------------------------
Message: 3
Date: Sat, 24 Sep 2016 21:08:19 -0700
From: Don North <north at alum.mit.edu>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Re: DEC TC11 maindec listings?
Message-ID: <90d93153-2109-0f5f-6b1e-c1d4daa7a83b at alum.mit.edu>
Content-Type: text/plain; charset=utf-8; format=flowed
On 9/24/2016 8:32 PM, Al Kossow wrote:
> I had it on fiche, which I scanned this afternoon.
> It should be up on the bitsavers mirrors by morning PDT under pdp11/xxdp
> along with rev E of the XXDP+ users guide.
>
> I'll probably also do the RX02 diags if I can find them for Don, though
> he may have them on fiche.
I was able to get ZRXDC0, ZRZEA0, and ZRXFB0 listings from the fiche images
on
http://www.retrocmp.com/tools/pdp-11-diagnostic-database
so I am fine for RX02 diagnostics listings.
Don
> The step and repeat fiche scanner isn't on line yet so I used the Canon
> manual positioning one. It's tedious, and it gets out of focus easily, but
> they are better than nothing.
>
>
> On 9/21/16 12:38 PM, Mattis Lind wrote:
>> I have been looking for TC11 maindec listings in the usual places, but
>> didn't find any. I think they should be named ZTCA, ZTCB, ZTCC, ZTCD and
>> ZTCE.
>>
>> Does anyone know of an online location or happen to have an offline paper
>> original?
>>
>> /Mattis
>>
>
------------------------------
Message: 4
Date: Sun, 25 Sep 2016 07:53:58 +0200
From: Mattis Lind <mattislind at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Re: DEC TC11 maindec listings?
Message-ID:
<CABr82SJWUVc7HURrEhaLoL7A7CEo4kPyAp+Hhfk3Z87MhaZjvA at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
2016-09-25 5:32 GMT+02:00 Al Kossow <aek at bitsavers.org>:
> I had it on fiche, which I scanned this afternoon.
> It should be up on the bitsavers mirrors by morning PDT under pdp11/xxdp
> along with rev E of the XXDP+ users guide.
>
Exactly what I needed! Thanks a lot Al!
/Mattis
>
> I'll probably also do the RX02 diags if I can find them for Don, though
> he may have them on fiche.
>
> The step and repeat fiche scanner isn't on line yet so I used the Canon
> manual positioning one. It's tedious, and it gets out of focus easily, but
> they are better than nothing.
>
>
> On 9/21/16 12:38 PM, Mattis Lind wrote:
> > I have been looking for TC11 maindec listings in the usual places, but
> > didn't find any. I think they should be named ZTCA, ZTCB, ZTCC, ZTCD and
> > ZTCE.
> >
> > Does anyone know of an online location or happen to have an offline
> > paper
> > original?
> >
> > /Mattis
> >
>
>
------------------------------
Message: 5
Date: Sun, 25 Sep 2016 06:41:16 +0000 (UTC)
From: William Maddox <wmaddox at pacbell.net>
To: "cctalk at classiccmp.org" <cctalk at classiccmp.org>
Subject: Electronic surplus in the southwest
Message-ID: <166539568.4256917.1474785676417 at mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
I will be visiting Albuquerque, Phoenix, Tucson, and various points nearby
and in-between shortly.Any recommendations on electronics surplus and junk
shops to check out? ?Some of the most famous, like the Black Hole in Los
Alamos are long gone. ?Any other must-see attractions for the classic
computer geek?
--Bill
------------------------------
Message: 6
Date: Sun, 25 Sep 2016 02:32:34 -0600
From: Eric Smith <spacewar at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Re: Decoding kryoflux stream for HP9895A
Message-ID:
<CAFrGgTT31V-4HPpJU1_9TXVyMMebOd3A9mW3oSEtKZWoQxxExw at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
On Tue, Sep 20, 2016 at 7:42 AM, Denise de Vries
<denise.devries at flinders.edu.au> wrote:
> Does anyone know of documentation for the HP9895A format with its own M2FM
> encoding?
> I have a kryoflux preservation stream but so far can make no sense of it.
On Wed, Sep 21, 2016 at 12:59 AM, Christian Corti
<cc at informatik.uni-stuttgart.de> wrote:
> I've already written a decoder for the HP 9885/9895 format. Denise already
> sent me his image, but I haven't had the time to try decoding it yet...
Denise sent me the image as well.
dfitoimd has now been renamed to fluxtoimd, as it now supports both
DiscFerret and KryoFlux image input. I've partially added HP M2FM
format; it now correctly decodes the address fields, but I have a bit
more work to do on the data fields. I expect to have it completed
tomorrow.
> - 0xD0: ECC data address mark
Any idea how they use that? Aside from that being included in the list
of address marks in the service manuals, it's not described at all.
Since the 7902/9885/9895 don't do ECC, perhaps it was reserved for
future use.
------------------------------
Message: 7
Date: Sat, 24 Sep 2016 21:31:23 -0600
From: Craig Ruff <cruff at ruffspot.net>
To: cctech at classiccmp.org
Subject: AC Filter Cap Brand Recommendations
Message-ID: <AE56D6F8-11C3-457E-A464-5709245849D8 at ruffspot.net>
Content-Type: text/plain; charset=utf-8
Wouldn?t you know it, the same day I decide to order a ribbon and some paper
for my HP 82905B (aka Epson MX80) printer, the AC line filter cap (C1 on the
MFIL board), expelled its magic smoke rather impressively. After some
cleanup, the printer has been banished to the garage until the smell
diminishes. It appears to be a 250 V, 0.1 ?F X type. What manufacturers
have good reliability for this application, in your opinion?
------------------------------
Message: 8
Date: Sat, 24 Sep 2016 23:38:08 -0400
From: Peter Cetinski <pete at pski.net>
To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org>
Subject: Re: AC Filter Cap Brand Recommendations
Message-ID: <35029F98-7F90-405F-85E9-3611BE2DF2BC at pski.net>
Content-Type: text/plain; charset=utf-8
On Sep 24, 2016, at 11:31 PM, Craig Ruff <cruff at ruffspot.net> wrote:
>
> Wouldn?t you know it, the same day I decide to order a ribbon and some
> paper for my HP 82905B (aka Epson MX80) printer, the AC line filter cap
> (C1 on the MFIL board), expelled its magic smoke rather impressively.
> After some cleanup, the printer has been banished to the garage until the
> smell diminishes. It appears to be a 250 V, 0.1 ?F X type. What
> manufacturers have good reliability for this application, in your opinion?
That?s a common item on Tandy power supplies so I?ve replaced a lot of
these. I?ve used this replacement numerous times with great success.
https://www.digikey.com/product-detail/en/kemet/PMR209MC6100M047R30/399-751…
<https://www.digikey.com/product-detail/en/kemet/PMR209MC6100M047R30/399-751…>
------------------------------
Message: 9
Date: Sat, 24 Sep 2016 22:58:53 -0700
From: Chuck Guzis <cclist at sydex.com>
To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org>
Subject: Re: AC Filter Cap Brand Recommendations
Message-ID: <e7b74d80-ceab-4a41-2b31-4a367667b52b at sydex.com>
Content-Type: text/plain; charset=utf-8
On 09/24/2016 08:31 PM, Craig Ruff wrote:
> Wouldn?t you know it, the same day I decide to order a ribbon and
> some paper for my HP 82905B (aka Epson MX80) printer, the AC line
> filter cap (C1 on the MFIL board), expelled its magic smoke rather
> impressively. After some cleanup, the printer has been banished to
> the garage until the smell diminishes. It appears to be a 250 V, 0.1
> ?F X type. What manufacturers have good reliability for this
> application, in your opinion?
>
Any of the major brands should be good--Kemet, Panasonic,..
--Chuck
------------------------------
Message: 10
Date: Sun, 25 Sep 2016 13:30:36 +0100
From: "Rob Jarratt" <robert.jarratt at ntlworld.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Digital Storage Architecture - Media Format
Message-ID: <00b601d21728$9f1eeb20$dd5cc160$(a)ntlworld.com>
Content-Type: text/plain; charset="us-ascii"
The VMS documentation mentions specification for the Digital Storage
Architecture that cover media formats. I have looked at the DSA folder on
bitsavers and cannot see any document that covers media formats. Is this
documentation available anywhere?
Thanks
Rob
End of cctalk Digest, Vol 27, Issue 24
**************************************
I have been looking for TC11 maindec listings in the usual places, but
didn't find any. I think they should be named ZTCA, ZTCB, ZTCC, ZTCD and
ZTCE.
Does anyone know of an online location or happen to have an offline paper
original?
/Mattis
The VMS documentation mentions specification for the Digital Storage
Architecture that cover media formats. I have looked at the DSA folder on
bitsavers and cannot see any document that covers media formats. Is this
documentation available anywhere?
Thanks
Rob
I will be visiting Albuquerque, Phoenix, Tucson, and various points nearby and in-between shortly.Any recommendations on electronics surplus and junk shops to check out? ?Some of the most famous, like the Black Hole in Los Alamos are long gone. ?Any other must-see attractions for the classic computer geek?
--Bill
Wouldn?t you know it, the same day I decide to order a ribbon and some paper for my HP 82905B (aka Epson MX80) printer, the AC line filter cap (C1 on the MFIL board), expelled its magic smoke rather impressively. After some cleanup, the printer has been banished to the garage until the smell diminishes. It appears to be a 250 V, 0.1 ?F X type. What manufacturers have good reliability for this application, in your opinion?
I know it's a long shot, but does anyone have a manual for a SpectraGen
4B Video Title Generator? I am trying to resurrect one, and it seems to
be a Z80-based unit.
Jim
--
Jim Brain
brain at jbrain.comwww.jbrain.com
Hi, all, I have a HP 7970B/E Tape Unit Diagrams and Parts Manual available; I
got it with a group of other manuals, and I don't have any use for it.
I'd prefer to get something in return for it (some PDP-11 manual/print I don't
have, or something), but mostly I want to get this into the hands of someone
who can actually use it (it's already on Bitsavers, so it doesn't fill a
lacuna).
Noel
