You can contact Joerg at his site http://retrocmp.com/contact For email see
the UNIBone - Get One Page
http://retrocmp.com/projects/unibone/283-unibone-getting-one
A fellow on the VCF DEC forum tried to contact Joerg about a UNIBone recently
and said he had better luck using the contact page
Hi, I have Joerg's Unibone bare boards available (and others listed at
https://retrobrewcomputers.org/doku.php?id=boardinventory#dec_digital_boards_designed_by_joerg_hoppe).
Feel free to contact me privately if interested.
Thanks,
Todd
On 1/10/2022 2:43 PM, Chris Zach via cctalk wrote:
Hm. Th
Hm. That is an idea. Technically I'm just wanting to get the thing
working to see if it works, so a Unibone would be reasonable. Now where
do I buy one/a kit/whatever.
C
On 1/10/2022 10:46 AM, Jay Logue via cctalk wrote:
On 1/9/2022 7:59 PM, Chris Zach via cctalk wrote:
*nod* I'll put th
> From: Chris Zach
> I'm guessing that the DD11-F is significantly different from the DD11-B?
I assume theat "DD11-F" is a typo; there is, AFAIK, no DD11-F, and a Web
search revealeddidn't turn anything up. (There are DD11-CF and -CK
backplanes, as well as -DF and -DK, but the -CF and -CK
On 1/9/2022 7:59 PM, Chris Zach via cctalk wrote:
*nod* I'll put the system aside again for awhile. But if I come across
a DD11-C or D I'll go back to work on it.
I understand your frustration, as I've spent the better part of a year
acquiring and fixing an ME11-L and associated board sets try
Sigh, shouldn't try to type when I'm this tired. Female 9-pin (to plug into
the BA11-D) to male 15-pin (for the DD11-C/D to plug into).
*nod* I'll put the system aside again for awhile. But if I come across a
DD11-C or D I'll go back to work on it.
In the "Go to Unibus hell" category I DO hav
> an adapter cable to go from a 9-pin male (shell; female pins) to a
> 15-pin female (shell; male pins)
Sigh, shouldn't try to type when I'm this tired. Female 9-pin (to plug into
the BA11-D) to male 15-pin (for the DD11-C/D to plug into).
Noel
> From: Chris Zach
> the DD11-B is a MUD backplane
No, it's SPC; other sources, e.g.
http://www.chdickman.com/pdp11/Notes/DD11.shtml
agree.
So if you have a DD11-B, you must have a BA11-D, with the 9-pin power
plugs.
The best thing to do is get a DD11-C or -D, and build an adapter c
On 1/9/22 4:04 PM, Chris Zach via cctalk wrote:
I'm working on my pdp11/10 getting it back together. One
problem I think I have is that the secondary memory (a
Plessy 700101-100) may be shorting the -15 line for some
reason. Working on it, but does anyone have a manual or
anything like that fo
Hm. So the DD11-B backplane does not appear to be SPC/MUD. Instead it
seems to handle 4 SPC devices along with a DF11 "communication line
adapter" in the middle AB slots.
Oi.
That brings up an interesting question: How did this system ever work in
the first place? I know I ran it with two of
If you have a 10-1/2" box, you can mount a MUD backplane - but you might
still have an issue because the older BA11-D boxes use the old 9-pin power
connectors, and the MUD backplanes (DD11-C, -D, etc) all use the newer 15-pin
ones.
There we go. I have an 11/05 in a BA11-D box with a DD11-B expan
> From: Chris Zach
> the secondary memory (a Plessy 700101-100) may be shorting the -15 line
> for some reason. Working on it, but does anyone have a manual or
> anything like that for this kind of memory board?
I've got a Plessey core memory manual somewhere, but I can't find it,
Worst case I guess I could put a broken MS11-PL board in and set it for
16k start. It's got bad memory chips on it but I think the first 16k
were good. And as a bonus it can work in both a +15 *AND* a +12 volt
Unibus (yeah, the 11/24 used +12 on the +15 lines. No idea what was
wrong with DEC)
I'm sorry, on the memories, I went to look at my old notebook form that
era, but it seems some pages have fallen out over time :-)
I think a friend has an 11/05 or 10, I will ask him for its
configuration and see if that will help.
cheers,
Nigel
Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ
Probably. It's a 1973 version, the DD11-B is a MUD backplane, but it
seems to only have power plugs for +5,+15,-15. Looking at the MUD specs
I see there are backplane pins assigned for +20 and -5 so I might be
able to cobble something together.
That's one of the fun things about Unibus: There
I would assume that your 11/10 has the suffix -NC. There were two
versions, the -NC used -15V four wire memory, and the later -SC used
+20V three-wire memory.
The +20V was provided by a MUD slot (Modified Unibus Device) and there
was usually a big red sticker in it warning to not plug a modul
I'm working on my pdp11/10 getting it back together. One problem I think
I have is that the secondary memory (a Plessy 700101-100) may be
shorting the -15 line for some reason. Working on it, but does anyone
have a manual or anything like that for this kind of memory board?
Alternately, what k
17 matches
Mail list logo
