> On the logic analyzer suggestion: I remember seeing a logic analyzer hooked
> to a PDP-11 at DEC, for software debugging. As I recall, it was connected at
> the console front panel, which seems reasonable since several key CPU data
> paths are exposed there.
Ooh, I like that suggestion! It
>> Would it be any difference if you run the machine at full speed or lower
>> speed...
>
> Ah, yes -- this I haven't tried yet! I have a KM11 replica, so this is easy
> enough to do; I'll give that a go when I next get back to the machine
> (possibly this evening).
Ran the machine on the mai
Hi Pontus,
I looked at my limited function front panels, and they were 54-11507s. I
have not looked at any prints. Where did you find the 54-11165 number?
Could it be for a Q-bus system?
The 50-X is the etched PCB. DEC usually added a 1 to that number to
make it complete board.
Thanks, Paul
On 05/02/2019 20:59, Chuck Guzis via cctalk wrote:
On 2/5/19 12:19 PM, Jack Harper via cctalk wrote:
I learned that very quickly - If you open the front of the Drive and
swing out the door with the electronics, drive motors etc, it is
definitely heavy enough to tip a rack.
I bolted the destin
On the logic analyzer suggestion: I remember seeing a logic analyzer hooked to
a PDP-11 at DEC, for software debugging. As I recall, it was connected at the
console front panel, which seems reasonable since several key CPU data paths
are exposed there.
paul
On Tue, Feb 5, 2019 at 10:03 AM Fritz Mueller via cctalk <
cctalk@classiccmp.org> wrote:
>
>
> FWIW, I maintain a Windows VM (on a MacOS X host) for the sole purpose of
> running PDP11GUI, and I use an USA19H USB serial dongle connected through
> to the VM as a serial interface. I don't know if s
On 2/5/2019 12:03 PM, Fritz Mueller via cctalk wrote:
>> Perhaps compile [test programs] under SimH and do a block-level diff of the
>> image with what is currently in use, and transfer just those blocks?
>
> I did experiment with this a little way back. I wrote a small standalone
> code that d
On 2/5/19 12:19 PM, Jack Harper via cctalk wrote:
>
>
> Greetings to the List -
>
> My very sincere THANKS for the enlightening responses from Chuck Guzis,
> Brent Hilpert and Jay West on mounting the HP 7970 tape drive Beasts.
>
> I am out of town on business for a couple days and will inspect
> I don't get replies from here yet, so I have seen no replies to my
> posts,
> nor the posts themselves.
>
> There is a shop that has been in biz for over 25 years that is closing
> in
> California.
>
Cindy,
Where in CA? It's a big state :)
-Ali
I don't get replies from here yet, so I have seen no replies to my posts,
nor the posts themselves.
There is a shop that has been in biz for over 25 years that is closing in
California.
I asked for anything old Apple, Sun, HP, IBM, and any old keyboards.
She will call me back tomorrow. She never
Greetings to the List -
My very sincere THANKS for the enlightening responses from Chuck
Guzis, Brent Hilpert and Jay West on mounting the HP 7970 tape drive Beasts.
I am out of town on business for a couple days and will inspect
things when I return.
Chuck is, of course, 100% correct o
Unfortunately, they have already scrapped everything! They were distributors
of old HP and IBM hardware.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
830-370-3239 cell
sa...@elecplus.com
---
This email has been checked for viruses by Avast antivirus software.
If anyone out there needs an EIA distribution panel to go with their
DZ11, here:
https://www.ebay.com/itm/321225351590
are some of the 8-line ones (as used in the later modular back panel
system). The seller (Efi) is good people.
Noel
Daniel Fecteau
6025 Arthur sauvé
Mirabel, Quebec
J7N 2W4
TEL: 450-969-1616 ext 101
Mail: s...@savesysteme.com
He has a variety of Model M 122 key keyboards. Contact him if you are
interested.
Not affiliated with seller, etc.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville,
> On Feb 5, 2019, at 10:03 AM, Fritz Mueller wrote:
>
> Unfortunately, when I tried to apply this, it seemed that SIMH's write single
> sector wasn't working correctly for me...
Correction to above: "PDP11GUI's write single sector". Apologies!
--FritzM.
> Would it be any difference if you run the machine at full speed or lower
> speed...
Ah, yes -- this I haven't tried yet! I have a KM11 replica, so this is easy
enough to do; I'll give that a go when I next get back to the machine (possibly
this evening).
> ...or even single step past this
> From: Cindy Croxton
> I changed email providers, and received no emails for a week. If you
> tried to contact me, please ask again!
Perhaps 'test' was not an optimal Subject: line - a lot of people think that
flags a message they can ignore, and not even look at - which was not what
>>> I keep wondering about the psu.
>>
>> Good theory.
>
> I'll give these a double-check...
I did give these a look yesterday. Indeed, the +5 regulator in position "C"
(which includes supply to the KT11) was running a little low (4.9 and change).
I trimmed it up, and checked the rest of t
Hi Al.
$ 60, plus shipping ?
I live close to Paris, France. Zip Code : 77310
( Payment through Paypal seems the only way ?? )
On an other subject, did you see my previous cctalk post on imaging HP 1000 L
series Eprom ? Any interest ?
Best regards
Gerard
> On Feb 5, 2019, at 8:45 AM, Jon Elson via cctalk
> wrote:
>
> I'd guess the diagnostic tries a few patterns to test for gross failure of
> this circuitry, but since it involves memory on a system running a program,
> it may not be able to exhaustively test these adders and comparators.
In
> Perhaps compile [test programs] under SimH and do a block-level diff of the
> image with what is currently in use, and transfer just those blocks?
I did experiment with this a little way back. I wrote a small standalone code
that dumps a CRC of every sector over the console; I can run this bo
On Mon, Feb 4, 2019 at 10:46 PM GerardCJAT via cctalk
wrote:
>
> I own a HP 1000 L series 200
> Cards are badly corroded at connectors level BUT some other parts are in
> very good shape.
>
> I can offer,
>
> HP "special SoS" processors: 1AA6-60004, 1AC5, 1AB5, 1AF5 ( - 60001 )
>
> The
I changed email providers, and received no emails for a week. If you tried
to contact me, please ask again!
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
830-370-3239 cell
sa...@elecplus.com
---
This email has been checked for viruses by Avast antivirus softwar
On 02/05/2019 07:36 AM, Noel Chiappa via cctalk wrote:
One would hope that the DEC KT11 diagnostic would check for this... but just
to be thorough, we have in fact written a short diagnostic which stores every
possible value in each UISA register and checks that it's correct. So unless
there is s
On 2/5/19 7:41 AM, dwight via cctalk wrote:
> I'm curious as to what the 9956 is for?
HP used uCTL as the bus interface in the 21xx
I have several. Make a serious offer.
On 2/4/19 11:09 PM, GerardCJAT via cctalk wrote:
> All is in the title.
> An other very long shoot, isn't it ? ;-)
>
I'm curious as to what the 9956 is for? One might be able to hack something
together with a NPN transistor and a TTL and gate.
This looks to be one of the oddball chips that Fairchild made in the early
days, before most settled down to TTL being the more common.
Dwight
__
Hello all,
I have built an emulator that uses an Arduino and SD card to provide four
"floppy drives" for an Epson PX8. It may also be usable with a PX4, but I have
no way of trying it.
If you would like to build one yourself, or just read about it, the details are
here: http://wrcooke.net/p
Den tis 5 feb. 2019 kl 00:23 skrev Fritz Mueller via cctalk <
cctalk@classiccmp.org>:
>
> > On Feb 4, 2019, at 2:28 AM, Noel Chiappa via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > I'm pretty sure the command only gets a few instructions in before it
> blows
> > up. Here are the process' reg
>
> Yeah, it may come to that. One issue we've been having is doing specialized
> test programmes; trying to run the C compiler fails. I don't know about the
> assembler, though. And as Fritz mentioned, it takes hours to load a new disk
> image. I think we've come up with a way around that, though
Brent wrote...
---
The right side of the drive (should) have little pieces of 1/8" thick
aluminum glued at the back of the rack-mount holes to match the thickness of
the left-side bracket, to make the drive seat parallel to the face of the
rack.
In my (limited) experience th
> From: Paul Koning
> Another possibility occurs to me: bad bits in the MMU (UISAR0 register
> ... if UISAR0 has a stuck bit so the "plain" case maps incorrectly
> you'd expect to come up with execution that looks nothing at all like
> what was intended.
One would hope that th
I'm sure there is a post in the archives about this...
There is a special custom HP bracket on the left. It is a heavy piece of
steel - and it MUST be, due to the weight and movement (swing out) of the
unit. I'm used to finding ways for one person to do a two man job when
mounting things in racks,
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