hat is 768-1024kw
To go to the second half of memory you go back up then to row 3 which is
bank 5 (1024-1280), then 6, then skip 2 to get to bank 7 and 8.
Realized this when I found a picture of an MSV11-P memory that had only
half the chips. DEC put them in that same order, and they di
So I have an MSV11-QC (the 4gb Q Bus memory board) that has a failed
bit. On an 11/73 it throws the following error:
Expected data = 125252 (1010 1010 1010 1010
Bad data= 121252 (1010 0010 1010 1010)
Address = 10015140
Which puts the error in the top 2mb (1mw), bit 4000
So I have an MSV11-QC (the 4gb Q Bus memory board) that has a failed
bit. On an 11/73 it throws the following error:
Expected data = 125252 (1010 1010 1010 1010
Bad data= 121252 (1010 0010 1010 1010)
Address = 10015140
Which puts the error in the top 2mb (1mw), bit 4000
Ok, so we banged the MSV11-P revision B/C memory issues into the ground
(looks like the problem is burst mode DMA on Q Bus can cause random
failures that corrupt disks) however does anyone know if the bug will
affect the board if you use it as a normal Q bus memory board?
In other words
> From: Aaron Taylor
> I can confirm that the DEC MSV11-R is a PMI card. I own two and have
> used them with my KDJ11-B. ... the board is recognized as PMI by my
KDJ11-B.
Also, in a fairly amazing bit of sleuthing, Jerry Weiss found (in some of the
early PR versions of the
> But I agree that given the 18 chips, [the MSV11-R is] probably parity.
The link below is a screenshot from the onboard KDJ11-B 'print a memory map'
function. It confirms the DEC MSV11-R is recognized as parity.
http://www.vcfed.org/forum/attachment.php?attachmentid=37954=1493018113
Aaron
> From: Chris Zach
> http://www.aceware.com.au/acms/images/Invent/GeneralRoboticsMSV_11R.jpg
I don't know what that is, but it's not an MSV11-R. Here:
https://gunkies.org/wiki/File:MSV11-R.jpg
is an MSV11-R.
> Maybe it's PMI memory without ECC? I count 18 bits acr
> I'm trying to confirm an online report that [the MSV11-R is] a PMI card;
I can confirm that the DEC MSV11-R is a PMI card. I own two and have used them
with my KDJ11-B.
The vcfed.org thread linked by someone else was actually started by me when I
purchased them and couldn't find dipswi
One is a DEC M7458 MSV11-R, the other is from a 3rd party "General Robotics
Corp." according to the printing on the board, which apparently happens to
share the same model name.
On Wed, May 6, 2020, 3:57 PM Chris Zach via cctalk
wrote:
> Cool, but can't see without logging in. Was
Cool, but can't see without logging in. Was the other pic wrong?
C
Photos of an actual DEC M7458 MSV11-R, not some random 3rd party
board, on this thread:
http://www.vcfed.org/forum/showthread.php?55636-MSV11-R-dipswitch-settings
On Wed, May 6, 2020 at 1:23 PM Noel Chiappa via cctalk
wrote:
>
> Hi, I'm looking for documentation on the MSV11-R; there's next to nothing
> online. (An -11/84 manual gives config, but that's all I cam find.) There is
> an 'MSV11-R User Guide' (EK-MSV1R-UG), but it's not online; I d
Ok. I think this is a picture of it:
http://www.aceware.com.au/acms/images/Invent/GeneralRoboticsMSV_11R.jpg
However if it is PMI then it does not have ECC. That's more like a
MSV11-Q type memory.
C
The link doesn't work but this does.
http://www.aceware.com.au/acms/images/Invent/GeneralRoboticsMSV_11R.jpg
Maybe it's PMI memory without ECC? I count 18 bits across which seems
like the MSV11-Q parity memory.
Does it say PMI on the side?
C
here is a picture of the board
http://www.aceware.com.au/acms/ExpandThumbnail.asp?str640_480Image='images%2FInvent%2FGeneralRoboticsMSV_11R.jpg'
In case you didn’t already have this info...
http://pdp-11.nl/fieldguide.html
This site has a doc “ Field guide to Q bus and unibus options“ modules and it’s
listed as a Q bus 3rd party option as follows...
MSV11-R Q General Robotics 4Mb 22-bit memory, MSV11-p compatible
Sent from my
for documentation on the MSV11-R; there's next to nothing
online. (An -11/84 manual gives config, but that's all I cam find.) There is
an 'MSV11-R User Guide' (EK-MSV1R-UG), but it's not online; I don't suppose
anyone out there has one?
I'm trying to confirm an online report that it's a PMI card; if so, I
Never heard of it, but if you want me to try plugging it into my BA23
let me know. What's the worst that could happen :-)
C
On 5/6/2020 4:23 PM, Noel Chiappa via cctalk wrote:
Hi, I'm looking for documentation on the MSV11-R; there's next to nothing
online. (An -11/84 manual gives config
Hi, I'm looking for documentation on the MSV11-R; there's next to nothing
online. (An -11/84 manual gives config, but that's all I cam find.) There is
an 'MSV11-R User Guide' (EK-MSV1R-UG), but it's not online; I don't suppose
anyone out there has one?
I'm trying to confirm an online report
> It includes a table which says which chip each bit in the memory is
> stored in
Oh, there's an entry (well, actually two) missing from the table, which is the
parity bits (2; byte parity); I'll work them out and add them. (I know, by
elimination, which two columns of chips are the
On Sat, Mar 14, 2020 at 2:12 PM Noel Chiappa via cctalk <
cctalk@classiccmp.org> wrote:
> the MSV11-Q
> sends a 'write' signal to _all_ the banks, and selects the one to
> _actually_
> use by use of the RAS signal.
>
[...]
> Has anyone else seen this trick used anywhere e
e back burner, but
> with this swapping out the bad chip should be a piece of cake.
>
> Thank you again!
> CZ
>
> On 3/14/2020 4:12 PM, Noel Chiappa via cctalk wrote:
> > So, a while back someone had a broken MSV11-Q QBUS memory card, and
> needed
> > info on them
back someone had a broken MSV11-Q QBUS memory card, and needed
info on them. I said I'd provide same, but then got distracted. Well, I
finally got to it, and it's been added to the CHW page for them:
https://gunkies.org/wiki/MSV11-Q_QBUS_memory
It includes a table which says which chip each bit
So, a while back someone had a broken MSV11-Q QBUS memory card, and needed
info on them. I said I'd provide same, but then got distracted. Well, I
finally got to it, and it's been added to the CHW page for them:
https://gunkies.org/wiki/MSV11-Q_QBUS_memory
It includes a table which says which
Hi Doug,
If you are going to VCFMW, I can bring you a DEC M8044 for $25. Need
anything else?
Thanks, Paul
Hi, all, if anyone has any broken MSV11-J boards, I recently fixed one for a
list member, and if anyone else has a broken one they'd like me to take a
gander at, please let me know. (No charge!)
I won't be able to fix _all_ problems (we don't have prints, or replacements
for the custom gate
'm fixing to repair a broken MSV11-J for a list member, and the
combo of ECC and this might make it hard to track the problem down. (If only
one chip is dead, the ECC _should_ be able to 'paper over it'. So there are
probably two? But if I turn off ECC, to be able to find the bad chip, will I
get
> none of the other values used in that seemed to have a problem; but of
> course the program didn't include all 2^16 patterns. I suppose I should
> whip up a small program to try other values, and see if anything else
> does this...
And it does! Quite a few values come back
> I first have to tweak my 'scope loop program, to turn on memory mapping
So while doing that I just discovered what I _think_ (maybe I'm just not being
smart enough to see that it's somehow 'doing the right thing') is the wierdest
hardware bug I've ever seen.
Plug in an MSV11-J, disable
> From: Glen Slick
> What signal were you probing on the M8186 KDF11-A board?
BDOUT; I'm triggering on that, and without any prints it wouldn't be easy to
find on the MSV11-J. Picking it up off the KDF11-A was the easy way to go.
> If you run the XXDP VMJAB0 d
> From: Tor Arntsen
> So, here's how to see the updated page while not logged in:
Thanks for posting the 'fix'; the problem, and that workaround, are described
on the 'News' sidebar on the Main Page, but of course people going straight
to a URL won't see that - and since I'm always
On 6 July 2018 at 09:48, Tor Arntsen wrote:
> On 6 July 2018 at 05:29, Al Kossow via cctalk wrote:
>>
>>
>> On 7/5/18 8:20 PM, Glen Slick via cctalk wrote:
>>
>>> I don't see any chip info update at that #Technical_information page.
>>
>> The gunkies wiki is broken, none of his changes are
On 6 July 2018 at 05:29, Al Kossow via cctalk wrote:
>
>
> On 7/5/18 8:20 PM, Glen Slick via cctalk wrote:
>
>> I don't see any chip info update at that #Technical_information page.
>
> The gunkies wiki is broken, none of his changes are getting out to the world.
Yes, that's very strange.. if
On 7/5/18 8:20 PM, Glen Slick via cctalk wrote:
> I don't see any chip info update at that #Technical_information page.
The gunkies wiki is broken, none of his changes are getting out to the world.
On Thu, Jul 5, 2018 at 4:43 PM, Noel Chiappa via cctalk
wrote:
> >> I'll add the info to the MSV11-J page on the CHWiki, once I have it.
>
> > Alas, it's down at the moment ... but once it's back, I'll get them
> > right up.
>
> It's back, and I've added
>> I'll add the info to the MSV11-J page on the CHWiki, once I have it.
> Alas, it's down at the moment ... but once it's back, I'll get them
> right up.
It's back, and I've added the chip info for the low 1MB bank:
http://gunkies.org/wiki/MSV11-J_QBUS_memory#Technical
y had the low bank
to worry about; so then I'll have to do the high bank - again, probably pretty
easy, from here.
The blasted card doesn't have the usual DEC Exx chip numbers, though! I had
to make up my own for it...
> I'll add the info to the MSV11-J page on the CHWiki, once I hav
> From: Glen Slick
> There are 88 41256 256Kx1 DRAMs on a 2MB MSV11-J. Each 512KB bank has
> 22 256Kx1 DRAMs organized as 16 data bits plus 6 ECC bits.
Umm, I think the internal organization is paired banks (one for even word
addresses, one for odd); the manual talks ab
On Mon, Jul 2, 2018 at 7:14 PM, Noel Chiappa via cctalk
wrote:
> Hi, I'm looking for engineering info on the MSV11-J. I was unable to find any
> prints online, or even a technical manual. (I have the User Manual, but it
> doesn't
> have much detail.)
> The main issue I'm after
Hi, I'm looking for engineering info on the MSV11-J. I was unable to find any
prints online, or even a technical manual. (I have the User Manual, but it
doesn't
have much detail.)
The main issue I'm after is working out which bits go into which chips. I
have some other QBUS memory boards
So I have a busted MSV11-P, and I needed the FMPS to work on it. There is one
online, but on my computers, it was extremely faint, and very hard (almost
impossible) to read.
So I have worked on it some, and I have a new version here:
http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/MP01239_MSV11-P.pdf
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