Re: RC11 manuals / schematics online?

[Christian Corti via cctalk]

On Sun, 11 Jun 2017, Jay Jaeger wrote:

Yes, I am doing the drawings at 600DPI, including the drawings that
reside inside a couple of the maintenance manuals (but 400DPI for the
text, etc.)


Please do *everything* at 600dpi, disk space and file sizes for such 
documents don't matter these days, especially as it won't be a big 
difference between 400 and 600 dpi.


Christian

Re: RC11 manuals / schematics online?

[Mattis Lind via cctalk]

2017-06-12 20:09 GMT+02:00 Mattis Lind :

>
>
> 2017-06-12 19:55 GMT+02:00 Mattis Lind :
>
>>
>>
>> 2017-06-12 18:59 GMT+02:00 Al Kossow via cctech :
>>
>>>
>>>
>>> On 6/12/17 7:17 AM, Mattis Lind via cctech wrote:
>>>
>>> > There is a note in my RS64 manual, page 3-1 / Figure 3-2, that says
>>> "Silver
>>> > colour  Soaped water, Dark blue  Special cleaning liquid" and then an
>>> arrow
>>> > to the disk surface in the picture.
>>>
>>> > Any thoughts about what the "Special cleaning liquid" could be?
>>> >
>>>
>>> No, but I hope you don't have the dark blue coated disk.
>>>
>>
>> The disk is very dark blue...
>>
>
>
> Here are a couple of pictures:
>
> http://i.imgur.com/lf6K5mc.jpg?1
>
> http://i.imgur.com/E8UVvma.jpg?1
>

It looks very much like David Gessweins DF32. He claims it is nickel cobalt
alloy plating.
What could be the best cleaning method for this plating?


https://www.pdp8.net/dfds32/pics/df32diskorig.shtml?small



>
>
>>
>>
>>
>>>
>>> One of the designers told me the original platters were rhodium plated
>>> to reduce
>>> friction, and they have the problem that the surface gets contaminated
>>> due to air pollution
>>> (apparently a serious problem with them in LA back in the day).
>>>
>>> The special stuff probably doesn't react with it.
>>>
>>>
>>>
>> /Mattis
>>
>>
>
/Mattis

Re: RC11 manuals / schematics online?

[Mattis Lind via cctalk]

2017-06-12 19:55 GMT+02:00 Mattis Lind :

>
>
> 2017-06-12 18:59 GMT+02:00 Al Kossow via cctech :
>
>>
>>
>> On 6/12/17 7:17 AM, Mattis Lind via cctech wrote:
>>
>> > There is a note in my RS64 manual, page 3-1 / Figure 3-2, that says
>> "Silver
>> > colour  Soaped water, Dark blue  Special cleaning liquid" and then an
>> arrow
>> > to the disk surface in the picture.
>>
>> > Any thoughts about what the "Special cleaning liquid" could be?
>> >
>>
>> No, but I hope you don't have the dark blue coated disk.
>>
>
> The disk is very dark blue...
>


Here are a couple of pictures:

http://i.imgur.com/lf6K5mc.jpg?1

http://i.imgur.com/E8UVvma.jpg?1


>
>
>
>>
>> One of the designers told me the original platters were rhodium plated to
>> reduce
>> friction, and they have the problem that the surface gets contaminated
>> due to air pollution
>> (apparently a serious problem with them in LA back in the day).
>>
>> The special stuff probably doesn't react with it.
>>
>>
>>
> /Mattis
>
>

Re: RC11 manuals / schematics online?

[Mattis Lind via cctalk]

2017-06-12 18:59 GMT+02:00 Al Kossow via cctech :

>
>
> On 6/12/17 7:17 AM, Mattis Lind via cctech wrote:
>
> > There is a note in my RS64 manual, page 3-1 / Figure 3-2, that says
> "Silver
> > colour  Soaped water, Dark blue  Special cleaning liquid" and then an
> arrow
> > to the disk surface in the picture.
>
> > Any thoughts about what the "Special cleaning liquid" could be?
> >
>
> No, but I hope you don't have the dark blue coated disk.
>

The disk is very dark blue...



>
> One of the designers told me the original platters were rhodium plated to
> reduce
> friction, and they have the problem that the surface gets contaminated due
> to air pollution
> (apparently a serious problem with them in LA back in the day).
>
> The special stuff probably doesn't react with it.
>
>
>
/Mattis

Re: RC11 manuals / schematics online?

[Paul Koning via cctalk]

That would fit.  Most metals are white (silvery) and rhodium, being a noble 
metal, doesn't oxidize so it retains the base metal color.

I wonder if it's the anti-friction properties that were impaired by LA smog.  
Even 1970s smog seems insufficiently potent to cause any changes to rhodium.  
Or maybe the coating wasn't gas tight so the smog would corrode the underlying 
base metal.

paul

> On Jun 12, 2017, at 1:53 PM, Al Kossow via cctalk  
> wrote:
> 
> that does seem to be the case. I never looked to see that rhodium plates 
> silver white.
> http://www.foxfinejewelry.com/blog/article/rhodium-plating-or-dipping-your-yellow-gold-jewelry-into-white-gold-jewelry/
> 
> On 6/12/17 10:43 AM, Paul Koning wrote:
> That seems odd because rhodium is a noble metal (a close relative of platinum 
> and palladium); I wouldn't expect it to
> react with water.  Or with much of anything short of aqua regia, for that 
> matter.  Perhaps the silvery stuff is the
> rhodium and the blue is gun blue, i.e., iron oxide?
> 

Re: RC11 manuals / schematics online?

[Al Kossow via cctalk]

that does seem to be the case. I never looked to see that rhodium plates silver 
white.
http://www.foxfinejewelry.com/blog/article/rhodium-plating-or-dipping-your-yellow-gold-jewelry-into-white-gold-jewelry/

On 6/12/17 10:43 AM, Paul Koning wrote:
That seems odd because rhodium is a noble metal (a close relative of platinum 
and palladium); I wouldn't expect it to
react with water.  Or with much of anything short of aqua regia, for that 
matter.  Perhaps the silvery stuff is the
rhodium and the blue is gun blue, i.e., iron oxide?

Re: RC11 manuals / schematics online?

[Al Kossow via cctalk]

On 6/12/17 7:17 AM, Mattis Lind via cctech wrote:

> There is a note in my RS64 manual, page 3-1 / Figure 3-2, that says "Silver
> colour  Soaped water, Dark blue  Special cleaning liquid" and then an arrow
> to the disk surface in the picture.

> Any thoughts about what the "Special cleaning liquid" could be?
> 

No, but I hope you don't have the dark blue coated disk.

One of the designers told me the original platters were rhodium plated to reduce
friction, and they have the problem that the surface gets contaminated due to 
air pollution
(apparently a serious problem with them in LA back in the day).

The special stuff probably doesn't react with it.

Re: RC11 manuals / schematics online?

[Mattis Lind via cctalk]

>
>> Also perhaps noteworthy that this RS64's "twin" which resided in the UW
>> Computer Systems Lab was at one point "resurrected" by flipping the disk
>> upside down.
>>
>
> Then one definitely need the track writer I guess. But it is good to know
> that it is possible to flip the disk if it is in bad condition.
>

There is a note in my RS64 manual, page 3-1 / Figure 3-2, that says "Silver
colour  Soaped water, Dark blue  Special cleaning liquid" and then an arrow
to the disk surface in the picture.

I understand this like there are two different variants of the disk, one
that can be cleaned in soaped water and one that need "Special cleaning
liquid".

Any thoughts about what the "Special cleaning liquid" could be?


>
>
>> JRJ
>>
>>
> /Mattis
>
>

/Mattis

Re: RC11 manuals / schematics online?

[Pontus Pihlgren via cctalk]

On Sat, Jun 10, 2017 at 10:59:14PM +0200, Mattis Lind via cctalk wrote:
> BTW. Speaking of dumping. Now that I have a TC11 / TU56 that seems to be
> working, what is the best way to dump 18 and 12 bit tapes? Is there some
> PDP-11 OS that can do it or is it assembly programming required? I had
> hopes that RT11 had such features but it doesn't seem like it could read
> all 18 bits.
> 
> Has this already been done? Maybe I can spend time on other things than
> re-inventing the wheel...
> 
> /Mattis

On OS/8 you have PIP10 which I think should handle 18 bit tapes. That 
doesn't really help you on a PDP-11 though.

/P

Re: RC11 manuals / schematics online?

[Mattis Lind via cctalk]

2017-06-12 0:27 GMT+02:00 Jay Jaeger :

> On 6/8/2017 2:22 AM, Mattis Lind via cctech wrote:
> > I happened to find a RS64 / RC11 combo (missing the PSU though). The
> > previous owner was an ex DEC field engineer that himself got it in the
> > beginning of the seventies. It is used but has the shipping lock on the
> > motor axis.
> >
> > Maybe the chances to get this working isn't that high especially since
> the
> > donator told me about all sorts of problems that happened to them. As far
> > as he remembered there were quite some problems with these RS64 and the
> > PSUs.
> >
> > http://i.imgur.com/jsgpF6v.jpg
> >
> > Anyway. Does someone has an online scan for the RC11 controller manual
> > and/or schematics?
> >
> > /Mattis
> >
>
> I have scanned my RC11 and RS64 manuals.  The text is generally 400dpi,
> the drawings 600dpi (including drawings inside the maintenance manuals).
>
> Like most stuff that I scan that is likely to be of interest to
> bitsavers, I store it in the following directory tree which mimics what
> they use.  My files can be found at:
>
> https://drive.google.com/open?id=0B2v4WRwISEQRWWFFdVpCZWFTZEU
>
> These particular scans are now in the (new) directories:
>
> .../pdf/dec/disc   (For the RS64)
> .../pdf/dec/unibus (For the RC11)
>


Thanks a  lot for the manuals and schematics. Will be really helpful when I
get to work with RC11/RS64.

You don't happen to have the diagnostic listings as well? I found a ZRCAB0
 and ZRCBB0 diagnostic but not any matching listing. Haven't found a ZRCC
diag as well.

So, if you have diagnostics listings and matching binaries or just listings
that would be very interesting as well.


>
> Note the drawing updates for the RS64 to take it from revision H to
> revision K (and perhaps L - but that part was written over in ink on the
> copy).
>
> Also, note that manual
>
> DEC-00-HRS64-E-D_RS64_disk_file_maintenance_manual
>
> Has a page that was placed in the document by Professor Marleau of UW
> (Wisconsin) Electrical Engineering.  It appears to be in regard to a
> manual repair undertaken on the RS64 (which is the very same drive that
> is in my collection).
>
> Also perhaps noteworthy that this RS64's "twin" which resided in the UW
> Computer Systems Lab was at one point "resurrected" by flipping the disk
> upside down.
>

Then one definitely need the track writer I guess. But it is good to know
that it is possible to flip the disk if it is in bad condition.


> JRJ
>
>
/Mattis

Re: RC11 manuals / schematics online?

[Jay Jaeger via cctalk]

On 6/8/2017 2:22 AM, Mattis Lind via cctech wrote:
> I happened to find a RS64 / RC11 combo (missing the PSU though). The
> previous owner was an ex DEC field engineer that himself got it in the
> beginning of the seventies. It is used but has the shipping lock on the
> motor axis.
> 
> Maybe the chances to get this working isn't that high especially since the
> donator told me about all sorts of problems that happened to them. As far
> as he remembered there were quite some problems with these RS64 and the
> PSUs.
> 
> http://i.imgur.com/jsgpF6v.jpg
> 
> Anyway. Does someone has an online scan for the RC11 controller manual
> and/or schematics?
> 
> /Mattis
> 

I have scanned my RC11 and RS64 manuals.  The text is generally 400dpi,
the drawings 600dpi (including drawings inside the maintenance manuals).

Like most stuff that I scan that is likely to be of interest to
bitsavers, I store it in the following directory tree which mimics what
they use.  My files can be found at:

https://drive.google.com/open?id=0B2v4WRwISEQRWWFFdVpCZWFTZEU

These particular scans are now in the (new) directories:

.../pdf/dec/disc   (For the RS64)
.../pdf/dec/unibus (For the RC11)

Note the drawing updates for the RS64 to take it from revision H to
revision K (and perhaps L - but that part was written over in ink on the
copy).

Also, note that manual

DEC-00-HRS64-E-D_RS64_disk_file_maintenance_manual

Has a page that was placed in the document by Professor Marleau of UW
(Wisconsin) Electrical Engineering.  It appears to be in regard to a
manual repair undertaken on the RS64 (which is the very same drive that
is in my collection).

Also perhaps noteworthy that this RS64's "twin" which resided in the UW
Computer Systems Lab was at one point "resurrected" by flipping the disk
upside down.

JRJ

Re: RC11 manuals / schematics online?

[Jay Jaeger via cctalk]

On 6/11/2017 1:16 PM, Noel Chiappa via cctalk wrote:
> > From: Jay Jaeger
> 
> > Fortunately, I do have some, and will scan them in
> 
> Yesss! Thank you!
> 
> > I will do the usual 400DPI / tiffs 
> 
> I've found that for engineering drawings, 600 dpi is better; the prints often
> contain very small writing (pin numbers, etc) which are sometimes hard to read
> at 400.
> 
> (Especially since you may have the only set left in the world, it's very
> important to get the best possible image of them.)
> 
>   Noel
> 

Yes, I am doing the drawings at 600DPI, including the drawings that
reside inside a couple of the maintenance manuals (but 400DPI for the
text, etc.)

Re: RC11 manuals / schematics online?

[Noel Chiappa via cctalk]

> From: Steven Malikoff

> I acquired an RC11 flip chip set

Do you mean literally this (just the cards), or did you mean a complete RC11
(including the backplane)? The Flip Chips do turn up (the ones I put up a
post about a few days back are RC11 chips), but the backplanes are rara aves
indeed.

Noel

Re: RC11 manuals / schematics online?

[Jay Jaeger via cctalk]

On 6/10/2017 3:29 PM, Al Kossow via cctalk wrote:
> 
> 
> On 6/10/17 8:02 AM, Mattis Lind via cctalk wrote:
> 
>> Well. Nobody has posted any thing about RC11 schematics, unfortunately.
> 
> I checked my usual places and couldn't find it.

Fortunately, I do have some, and will scan them in, and send a link.
I will do the usual 400DPI / tiffs in a zip / PDF.

> 
> 
>> With the RS64 and the RC11 it would be possible to run DOS/BATCH 11.
> 
> DOS-11 runs on dectape, rf11, and rk11
> 

And, indeed, an RC11/RS64.  That is what is currently loaded on my disk,
hearkening back to when I first used the particular machine that is in
my collection.

Re: RC11 manuals / schematics online?

[Jay Jaeger via cctalk]

On 6/10/2017 10:02 AM, Mattis Lind via cctalk wrote:
> 2017-06-08 18:38 GMT+02:00 Paul Koning :
> 
> 
> Well. Nobody has posted any thing about RC11 schematics, unfortunately.
> Maybe someone has a paper copy that could be scanned? Or that I can borrow
> to scan?
> 
> With the RS64 and the RC11 it would be possible to run DOS/BATCH 11. Could
> be interesting to test it on the real hardware.
> 
> Are there any other RS64/RC11 owners out there that has them running? Jay
> Jaeger lists a RC11/RC64 as part of a PDP-11/20 system on his web site.
> 

Indeed, I do have such a beast.  Last I tried them, a few months back,
they were still running (the 11/20 and the RS64/RC11).  I *do* have
drawings and they look to be good contrast.  I will scan them in over
the next day or so.


JRJ

RE: RC11 manuals / schematics online?

[Rick Bensene via cctalk]

Steve wrote:

>I acquired an RC11 flip chip set with the FOX 2 (PDP-11/15). Although I don't 
>have a schematic for them, I do have the schematic print >set for the 
>controller for the fixed-head / drum that Foxboro supplied which was a DDC 
>6200.

Check this out: 
http://www.ebay.com/itm/Data-General-Nova-DEC-PDP-11-2-5MG-Fixed-Head-Disk-Memory-System-UL6200-128-/122474087968?hash=item1c84064620:g:V~IAAOSwhvFZB59T

I'm not connected in any way with the seller.  Just thought it was interesting 
that the DDC 6200 was mentioned in this article, and I'd stumbled across this 
earlier today on eBay.

Rick Bensene
The Old Calculator Museum
http://oldcalculatormuseum.com

Re: RC11 manuals / schematics online?

[Steve Malikoff via cctalk]

Mattis said
> Well. Nobody has posted any thing about RC11 schematics, unfortunately.
> Maybe someone has a paper copy that could be scanned? Or that I can borrow
> to scan?
>
> With the RS64 and the RC11 it would be possible to run DOS/BATCH 11. Could
> be interesting to test it on the real hardware.
>
> Are there any other RS64/RC11 owners out there that has them running? Jay
> Jaeger lists a RC11/RC64 as part of a PDP-11/20 system on his web site.


I acquired an RC11 flip chip set with the FOX 2 (PDP-11/15). Although I don't 
have
a schematic for them, I do have the schematic print set for the controller for 
the
fixed-head / drum that Foxboro supplied which was a DDC 6200. This set is in the
same folio binding as the PDP-11/15 print set. The schematic covers the 
indicator
panel (looks a bit DECish) and so on. Foxboro had their own DBI bus which 
pluggned
into the Unibus, I have not looked at the prints closely enough to tell you 
much more
than that, or whether they would be useful to you. Although I have the RC11 set 
there
was no trace of a the drum when I recovered it.

Steve.

Re: RC11 manuals / schematics online?

[John Wilson via cctalk]

On Sat, Jun 10, 2017 at 10:35:52PM -0400, Paul Koning wrote:
>John Wilson might have some ideas.

I wrote a MACRO-11 program for dumping raw PDP-8 tapes on my TC11 on RT-11,
years ago.  I believe I hacked it to do PDP-10 DECtapes at some point too
(easy change since it's just a different block size).  I'd be happy to dig
it up.

John Wilson
D Bit

Re: RC11 manuals / schematics online?

[Paul Koning via cctalk]

> On Jun 10, 2017, at 4:29 PM, Al Kossow via cctalk  
> wrote:
> 
> 
> 
> On 6/10/17 8:02 AM, Mattis Lind via cctalk wrote:
> 
>> Well. Nobody has posted any thing about RC11 schematics, unfortunately.
> 
> I checked my usual places and couldn't find it.
> 
> 
>> With the RS64 and the RC11 it would be possible to run DOS/BATCH 11.
> 
> DOS-11 runs on dectape, rf11, and rk11

Also RP03.  At least for older versions you need the specific kit built for the 
particular system device type you're using.

DEC tape?  RT11 does, but I thought DOS doesn't, it can install from it, so 
SYSLOD can load from it and read the DOS image file from it, but I haven't 
heard of DECtape as a normal DOS boot device the way RT-11 does.  You can load 
files from DECtape, though, including executables.

paul

Re: RC11 manuals / schematics online?

[Paul Koning via cctalk]

> On Jun 10, 2017, at 10:35 PM, Paul Koning via cctalk  
> wrote:
> 
> 
>> On Jun 10, 2017, at 4:59 PM, Mattis Lind via cctalk  
>> wrote:
>> 
>>> ...
>> BTW. Speaking of dumping. Now that I have a TC11 / TU56 that seems to be
>> working, what is the best way to dump 18 and 12 bit tapes? Is there some
>> PDP-11 OS that can do it or is it assembly programming required? I had
>> hopes that RT11 had such features but it doesn't seem like it could read
>> all 18 bits.
>> 
>> Has this already been done? Maybe I can spend time on other things than
>> re-inventing the wheel...
> 
> RT-11 FILEX can read TOPS-10 format DECtapes.  I don't remember if it does 
> PDP-8 DECtapes, that's a bit harder because the block size is different.
> 
> If you want a raw block by block dump, I don't know about tools for that, 
> though a look at the FILEX source code should give you some ideas.  Or the 
> tape formatter code, for that matter; the basic idea is to put the RALL 
> function to work.

By the way, in RALL mode you're using program I/O to read the 18 bits, so (a) 
that pretty much calls for assembly language, and (b) you have to talk directly 
to the device and block other interrupts or you'll lose data.  FILEX raises IPL 
to 6 or 7 to turn off all interrupts including the clock, if I remember 
correctly.

paul

Re: RC11 manuals / schematics online?

[Paul Koning via cctalk]

> On Jun 10, 2017, at 4:59 PM, Mattis Lind via cctalk  
> wrote:
> 
>> ...
> BTW. Speaking of dumping. Now that I have a TC11 / TU56 that seems to be
> working, what is the best way to dump 18 and 12 bit tapes? Is there some
> PDP-11 OS that can do it or is it assembly programming required? I had
> hopes that RT11 had such features but it doesn't seem like it could read
> all 18 bits.
> 
> Has this already been done? Maybe I can spend time on other things than
> re-inventing the wheel...

RT-11 FILEX can read TOPS-10 format DECtapes.  I don't remember if it does 
PDP-8 DECtapes, that's a bit harder because the block size is different.

If you want a raw block by block dump, I don't know about tools for that, 
though a look at the FILEX source code should give you some ideas.  Or the tape 
formatter code, for that matter; the basic idea is to put the RALL function to 
work.

John Wilson might have some ideas.

paul

Re: RC11 manuals / schematics online?

[Al Kossow via cctalk]

On 6/10/17 1:59 PM, Mattis Lind wrote:

> 
> BTW. Speaking of dumping. Now that I have a TC11 / TU56 that seems to be 
> working, what is the best way to dump 18 and 12
> bit tapes? Is there some PDP-11 OS that can do it or is it assembly 
> programming required? I had hopes that RT11 had such
> features but it doesn't seem like it could read all 18 bits.
> 
> Has this already been done? Maybe I can spend time on other things than 
> re-inventing the wheel...
> 
> /Mattis
> 

Does John Wilson's PUTR handle this?

I had something to read PDP-15 tapes, maybe Eric Smith wrote it. I'll see if I 
can find it.

Re: RC11 manuals / schematics online?

[Mattis Lind via cctalk]

2017-06-10 22:29 GMT+02:00 Al Kossow via cctalk :

>
>
> On 6/10/17 8:02 AM, Mattis Lind via cctalk wrote:
>
> > Well. Nobody has posted any thing about RC11 schematics, unfortunately.
>
> I checked my usual places and couldn't find it.
>

Thanks for looking. Tomorrow I will visit our storage facilities (aka
converted barn) and I will then look through my heap of manuals and
schematics but I have no remembrance  of any RC11 manual.



>
> > With the RS64 and the RC11 it would be possible to run DOS/BATCH 11.
>
> DOS-11 runs on dectape, rf11, and rk11
>

The V8  (
http://bitsavers.trailing-edge.com/pdf/dec/pdp11/dos-batch/V8/DEC-11-OMGRA-A-D_DOS_BATCH_V008_System_Managers_Guide_Jan73.pdf)
talks about RC11 suport for example on page 2-6.



> I have lots of DOS dectapes dumped and uploaded, I've never had time to
> sort through whats there
> beyond writing a program to produce directory listings.
>
> I also finished processing and uploading everything I had scanned on DOS.
>
>
>
BTW. Speaking of dumping. Now that I have a TC11 / TU56 that seems to be
working, what is the best way to dump 18 and 12 bit tapes? Is there some
PDP-11 OS that can do it or is it assembly programming required? I had
hopes that RT11 had such features but it doesn't seem like it could read
all 18 bits.

Has this already been done? Maybe I can spend time on other things than
re-inventing the wheel...

/Mattis

Re: RC11 manuals / schematics online?

[Paul Koning via cctalk]

> On Jun 10, 2017, at 11:02 AM, Mattis Lind  wrote:
> 
> ...
> With the RS64 and the RC11 it would be possible to run DOS/BATCH 11. Could be 
> interesting to test it on the real hardware.

DOS/BATCH?  That would be DOS 8 or later.  I don't know if that still supported 
the RC11.  I do know for a fact that DOS 4 supports the RC11, that's what our 
physics department machine ran initially.

RT11 doesn't support RC11 out of the box, but adding that isn't all that hard.  
I wrote a driver for it in college, and another (independently developed) one 
was released at some point by someone from DEC and can be found online.  You 
have to add a boot driver also, of course.

RSTS supported RC11 for some time, certainly in V4 and probably a bit longer, 
but only as a disk for swapping and OS overlays, not to hold a file system.

paul

Re: RC11 manuals / schematics online?

[Mattis Lind via cctalk]

2017-06-08 18:38 GMT+02:00 Paul Koning :

>
> > On Jun 8, 2017, at 3:22 AM, Mattis Lind via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > I happened to find a RS64 / RC11 combo (missing the PSU though). The
> > previous owner was an ex DEC field engineer that himself got it in the
> > beginning of the seventies. It is used but has the shipping lock on the
> > motor axis.
> >
> > Maybe the chances to get this working isn't that high especially since
> the
> > donator told me about all sorts of problems that happened to them. As far
> > as he remembered there were quite some problems with these RS64 and the
> > PSUs.
>
> Nice find!  I don't think they were all that common; they were only made
> way at the beginning of the PDP11 line.  I used one in college; it
> developed a bad bearing at one point, which was cured simply by sending the
> motor out to the local motor shop for a new bearing.  Apart from that it
> worked fine.
>

This is good to know. Maybe it will be possible to get it working. Problem
though is that there usually are a few TTLs that has gone bad. And without
a schematic it is much harder to narrow down the problem. The TC11 I have
been working with had been stored in a dry closet, but still had a bad
N8281 chip. But with the help of the diagnostic and the schematic it was
quite easy to find it (Current Address register bit 9 stuck high).

Well. Nobody has posted any thing about RC11 schematics, unfortunately.
Maybe someone has a paper copy that could be scanned? Or that I can borrow
to scan?

With the RS64 and the RC11 it would be possible to run DOS/BATCH 11. Could
be interesting to test it on the real hardware.

Are there any other RS64/RC11 owners out there that has them running? Jay
Jaeger lists a RC11/RC64 as part of a PDP-11/20 system on his web site.



>
> paul
>
>
/Mattis

Re: RC11 manuals / schematics online?

[Paul Koning via cctalk]

> On Jun 8, 2017, at 3:22 AM, Mattis Lind via cctalk  
> wrote:
> 
> I happened to find a RS64 / RC11 combo (missing the PSU though). The
> previous owner was an ex DEC field engineer that himself got it in the
> beginning of the seventies. It is used but has the shipping lock on the
> motor axis.
> 
> Maybe the chances to get this working isn't that high especially since the
> donator told me about all sorts of problems that happened to them. As far
> as he remembered there were quite some problems with these RS64 and the
> PSUs.

Nice find!  I don't think they were all that common; they were only made way at 
the beginning of the PDP11 line.  I used one in college; it developed a bad 
bearing at one point, which was cured simply by sending the motor out to the 
local motor shop for a new bearing.  Apart from that it worked fine.

paul

RC11 manuals / schematics online?

[Mattis Lind via cctalk]

I happened to find a RS64 / RC11 combo (missing the PSU though). The
previous owner was an ex DEC field engineer that himself got it in the
beginning of the seventies. It is used but has the shipping lock on the
motor axis.

Maybe the chances to get this working isn't that high especially since the
donator told me about all sorts of problems that happened to them. As far
as he remembered there were quite some problems with these RS64 and the
PSUs.

http://i.imgur.com/jsgpF6v.jpg

Anyway. Does someone has an online scan for the RC11 controller manual
and/or schematics?

/Mattis