It did happen, but I had to leave before they got to the 2nd shed, and I
was not able to upload anything onsite. Please see
https://deskthority.net/viewtopic.php?f=62&t=20593&e=1&view=unread#unread
and
https://drive.google.com/drive/folders/1Kw9caNwgBhlP-FMfQo9jsuTMeE2n0vd8?usp=sharing
Nice System/36 & 5250.
On 2019-01-20 01:50, Cindy Croxton via cctalk wrote:
It did happen, but I had to leave before they got to the 2nd shed, and
I
was not able to upload anything onsite. Please see
https://deskthority.net/viewtopic.php?f=62&t=20593&e=1&view=unread#unread
and
https://drive.g
> From: Fritz Mueller
> it flagged a bunch of memory locations that weren't reported by my much
> simpler diagnostic (which only does all-ones/all-zeros passes looking for
> stuck bits at this point.)
What is is complaining about?
> The MAINDEC memory diagnostic is bulky and
Bummer time I turned on my VXT2000+ today and after about
5 minutes there was a "pop" and a small puff of smoke from
the power supply. No smell like you get from a selenium diode
or other semiconductor. Now, the fan tries to run but only
twitches and the led blinks slowly. No obvious blow
Original lister has relisted the item
https://www.ebay.com/itm/IBM-3850-media-cartridge-1970s-vintage/123603101597
And now one shows up in the UK. Same photos and description. Very strange.
https://www.ebay.co.uk/itm/113564749573
I have asked why his listing is identical to the other one. :-)
On 1/20/19 12:30 PM, cctalk via cctalk wrote:
> Original lister has relisted the item
>
> https://www.ebay.com/itm/IBM-3850-media-cartridge-1970s-vintage/123603101597
>
> And now one shows up in the UK. Same photos and description. Very strange.
>
> https://www.ebay.co.uk/itm/113564749573
>
> I
I'm trying to find a way to get my DEC Rainbow's monochrome output onto a
newer monitor than my aging VR201 (especially since I zapped something in
it and my diagnostic efforts to date haven't fixed it).
I can't remember the video output on the Rainbow, but I wanted to do
something similar t
Thanks, Paul and Noel, for the detailed responses per usual!
> On Jan 20, 2019, at 6:55 AM, Noel Chiappa wrote:
>
> What is [MAINDEC ZQMC] complaining about?
Looks like a few more flaky bits in a couple of additional banks. For those
reading along who may be unfamiliar with the MS11-L, it is
> From: Paul Koning
> It checks if the bits 007750 are active in the parity CSR, if so it
> takes that to be an address/ECC parity CSR.
That's odd; those are the 'error address' bits. Maybe there's an assumption
that the sweep of memory to size it will have caused a parity error from
> On Jan 20, 2019, at 4:29 PM, Noel Chiappa via cctalk
> wrote:
>
>> From: Paul Koning
>
>> It checks if the bits 007750 are active in the parity CSR, if so it
>> takes that to be an address/ECC parity CSR.
>
> That's odd; those are the 'error address' bits. Maybe there's an assumption
> th
Some further info on the parity halt/trap thing:
Digging again this morning for what I saw yesterday, it does look like it's a
MS11 fastbus thing. The EHA/EHB bits are described in the Jan 1973 version of
the 11/45 MS11 maintenance manual (table 3-12, describing the parity register),
but they
> On Jan 20, 2019, at 3:56 PM, Fritz Mueller via cctalk
> wrote:
>
> ...
> I'm technically curious, now, about the failure modes of these sorts of
> DRAMS. I guess in addition to stuck bits, there are also potential decode
> fails (show up on address test, but not ones/zeros) and some erro
All,
I'm looking for hardcopy of:
* Intel MCS-80 System Design Kit User's Guide
* Intel MCS-8 Manual (8008)
* Intel PROMPT-48 Microcomputer User's Manual
I've got PDFs of these, but I like original dead tree format when I can
find it.
Thanks,
Jonathan
Further archeology has led me to the "PDP-11/45, 11/50 MOS Memory
Troublshooting Guide", the cover letter of which is quite amusing:
"...COMPANY CONFIDENTIAL, that is take [this guide] on site but do not let the
customer read it."
"Please do not send these to the Depot for repair!! Instead sen
On Sun, Jan 20, 2019 at 12:57 PM Marvin Johnston via cctalk <
cctalk@classiccmp.org> wrote:
>
> > I'm trying to find a way to get my DEC Rainbow's monochrome output onto a
> > newer monitor than my aging VR201 (especially since I zapped something in
> > it and my diagnostic efforts to date haven't
> From: Fritz Mueller
> The most efficient way I think would be to work up a simple LDA loader
> that would fit in a boot sector, and load a diagnostic from contiguous
> disk starting at the second sector. It would then be easy to blast down
> just the boot sector and a single
On Sun, Jan 20, 2019, 4:11 PM Warner Losh As a PS, I connected the real vr201 with a keyboard and got the attached
> photo. It looks like there is a one line error about missing keyboard in
> the first line when there is no keyboard. Counting out the rows on the boot
> screen confirms. So this is
I have a few VR201 boards I might let loose. I don't want to sell any
monitors until I fell off the DECMATES , Rainbows, and Pros.
Paul
On Sat, Jan 19, 2019 at 12:57 PM Warner Losh via cctalk <
cctalk@classiccmp.org> wrote:
> Greetings,
>
> I'm trying to find a way to get my DEC Rainbow's monoc
> On January 20, 2019 at 3:56 PM Fritz Mueller via cctalk
> wrote:
>
>
>
> I'm technically curious, now, about the failure modes of these sorts of
> DRAMS. I guess in addition to stuck bits, there are also potential decode
> fails (show up on address test, but not ones/zeros) and some erro
I have these two in unused condition (the paper inside is a little yellowed
but apart from that looks new) including cassettes.
Cat no: 26-3839 & 26-3823
Ten pound including postage as paypal gift - not asking a lot as I'd rather
someone had them and saved them from the tip.
Regards, Mark.
2nd seller indicates he is the first seller. Just selling on UK eBay. Don’t
think you need different IDs to do that but what the hey. Whatever floats your
boat.
Anyone in the UK want a handful of Sun SCSI cables. Six cables of various
lengths with various combinations of narrow, wide and ultrawide connectors
including the tiny SCSI connectors. 5 quid as a paypal friend will cover
postage.
Regards, Mark.
As a PS, I connected the real vr201 with a keyboard and got the attached
photo. It looks like there is a one line error about missing keyboard in
the first line when there is no keyboard. Counting out the rows on the boot
screen confirms. So this is much closer than I thought.
Warner
On Sun, Ja
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