plessey qbus cards
nierveze
I am a long time user and collector of Dec machines,and collected
lots of pdp and vaxes .As years go by ,I found in several machines lots of
'Plessey Peripheral' qbus cars:'clones' of rxv11 ,dlv11
memories ..etc... all of them have lots of switches for configuration of
course.Until now I have been totally unable to find any information about
them,people at Plessey do not even remember
having manufactured such things...can anyone help me ?
I some one has ideas about how to find information,I 'll sent the part
numbers ,a rather long list.
I also have a pseudo rk disk controller
Thanks very much
A.Nierveze
K Murrell
http://www.ps8computing.co.uk/PDP11/plessey.htm lists the pages.
I do intend to scan all the pages, but have yet to find the time.
If there is anything in particular you need help on, let me know.
Kevin
"nierveze" <alain.n...@radio-astronomie.com> wrote in message
news:3e1e8743$0$207$4d4e...@read.news.fr.uu.net...
Antonio Carlini
> hello everyone on the group and best wishes for the new year,
> I am a long time user and collector of Dec machines,and collected
> lots of pdp and vaxes .As years go by ,I found in several machines lots of
> 'Plessey Peripheral' qbus cars:'clones' of rxv11 ,dlv11
> memories ..etc... all of them have lots of switches for configuration of
I have scans of
"6660 & 8660 Series Computer System User Manual"
and
"PM-SV4P MOS Memory User Manual"
Let me know if either of these would be useful.
Antonio
arca...@iee.org
nierveze
well ...the qbus cards are the following ones:
705020-100b it is a four serial lines mux
705035-100e its a ram card (128k*18bits),maybe also boot proms
705035-101b /101d the same with half the quantity of ram(64k*18bits)
703530-100k/610 it is a floppy controller for things like Shuggart sa800/801
here are the references written on the the cards ,of course like DEC Qbus
cards each one has at least two packs of switches (csr and vector) ,
on these cards there are also several wrap wire pins for other
configurations.
I simply (!!!)need to know what to do with all these things to configure the
cards...
easier to say than to find the information :((((
thanks for your help,if you can find things on you books,thanks again
really is is a pity to be unable to use them as I have several of each one
,and they seem clean.
A.Nierveze
nierveze a écrit dans le message
<3e1e8743$0$207$4d4e...@read.news.fr.uu.net>...
Antonio Carlini
> hello both of you ,thanks for your answer,
> well ...the qbus cards are the following ones:
> 705020-100b it is a four serial lines mux
> 705035-100e its a ram card (128k*18bits),maybe also boot proms
> 705035-101b /101d the same with half the quantity of ram(64k*18bits)
> 703530-100k/610 it is a floppy controller for things like Shuggart sa800/801
> here are the references written on the the cards ,of course like DEC Qbus
> cards each one has at least two packs of switches (csr and vector) ,
> on these cards there are also several wrap wire pins for other
> configurations.
I'm afraid I've not seen docs for any of those. Sorry.
If you don't find any other information you could try
to work out the CSR address settings. Take a MicroVAX III
with nothing but CPU and memory (to avoid any potential
conflicts) and add one card. Use the SHOW QBUS command
at the console prompt and you should be able to identify
the card you have inserted (it may be emulating a known
DEC card). Now power off, remove the card and change one
setting on one switch pack. Re-insert the card, power up
and see how the bus configuration has changed. It's
very likely that the CSR address is set by a block of
switches, all together. Quite possibly an entire switch
pack will set the address and then the other one will
almost certainly set the vector. (I was going to say
"definitely" but the first manual I pulled off the
shelf to look at was the DHV11 and that spreads the
CSR switches over more than one pack).
I presume that for cards like serial interfaces, the
jumpers will set things like baud rate and 7 vs 8 bits
and parity and so on. Once you have the CSR/vector
stuff sorted, and assuming that you can boot an OS
that recognises the card (this almost certainly means
the card will have to emulate a known DEC card) then
you can work out the baud rate settings by trial
and error.
Without docs, that might be the best you can do.
Antonio
arca...@iee.org
nierveze
Thanks for the idea , I'll do it when I'll have time , I'll use a microvax
4000,
that has a similar console to the mvIII.I'd like very much to use these
boards.
Today I repaired a pdp11/23+, that I found in an underground parking , when
we went to cinema for Christmas (...), we got it for two bottles , two days
in restoring all that they cut with scissors,...(why do people use wrong
tools, hurt themselves often , break the machines,and give lots of work to
repair people). The machine boots on rsx11m .It was used to control the
parking. The company told me they had a pdp11 in every parking, one was a
11/34 , but the one I have was unfortunately the last .It also boots rt11
fine.It has only a problem in a rx01,only rx0 works.The rl02 is ok.They
looked for all was DIGITAL at their society ,and also gave me two la100...I
should go to cinema more often!!!!!
Good bye Antonio , I hope you are well, and wish you all the best for this
new year just beginning.
A.Nierveze
Antonio Carlini a écrit dans le message <3E20BE46...@iee.org>...
>nierveze wrote:
>> hello both of you ,thanks for your answer,
>> well ...the qbus cards are the following ones:
>
>I'm afraid I've not seen docs for any of those. Sorry.
>
>If you don't find any other information you could try
>to work out the CSR address settings.
Chris Doran
<...<
> It has only a problem in a rx01,only rx0 works.
Since you seem to be on a roll, maybe your luck is still in and it's
the common problem that the drive belt has dropped off. Either take
the bottom off RX1 to look, or align the hole in the hole in a disk,
insert it, flip the door, and see if it's turned.
Chris
nierveze
is turning also,I also cleaned and put some drops of light oil on the
helical rod
carring the head (another frequent reason of positioning error),the
stepper motor works also...no, I am afraid it is not a simple
mechanical problem ,there should be an electronic problem.
I'll have time to look at it next sunday.
Good bye
thanks again
Alain Nierveze
Chris Doran a écrit dans le message
<948f0720.03011...@posting.google.com>...