25 Jan
2012
25 Jan
'12
10:52 a.m.
On 01/25/2012 11:28 AM, Holm Tiffe wrote:
allison wrote:
Yes, know this. But what's the right PMI for the KDJ11?
To
the best info I have all three board noted are for MicroVAX. I do
not know
the kDJ11B PMI memory needed. I have a KDJ11A and that uses Qbus memory.
Most of the systems have M8059 256Kbyte as I have many of them and a few
have larger 1mb boards.
On 01/25/2012 06:40 AM, Holm Tiffe wrote:
Yes, but I mean the difference between 773000 vs 173000.
I see the ROMs in ODT at 773000 but not at 173000!
Anyway, I'll jumpering the CPU to bootstrap and will look what happens.
Hi,
I have A M8186 (KDF11-A Rev D) and an M8047-CA (MXV11-AC) currently in
an H9275 Backplane.
I've fiddeled around an wondering why I can't access the ROMs on the M8047
at 173000. Finally found it, they get active ad 773000 in the ODT, since
the M8047 is using the BBS7 Signal from the CPU to decode the ROM Address.
My question is now regarding the Bootstrap setting, the Manual says that in
ODT mode the BDAL16 and BDAL17 are enabled to get access to the higher
memory contents. How is this handeled while bootstrapping? I can't set a
bootstrap address of 773000 on the KDF11, it boots now in ODT Mode and
displays 173000 after Reset, thati's the jumpered address.
How is this (BBS7) handeled while bootstrapping? Is the BBS7 low while
bootstrap at 173000 or is the M8047 incompatible with this processor?
(I've not tested to bootstrap since I don't know what is in the ROMs and I
don't have an RX02 nor TU58 to connect, want to put in a M7555 so I have to
change the ROMs for sure). As far as I know this KDF11 should be able to
handle 22 bits (420HD0 on the Handle, 5013326 D-P4 on the Board) is that
the case?
Most all KDf11s are Q22 make sure both of the hybrid chips are there
the
second
one has the MMU for the 22 bit mapping!
Also make sure the backplane is Q22.
Lastly the M8047 make sure its jumpered correctly. If the boot in it
fails due to lack of device I think the report is 173003?.
ODT only knows 16bit octal. And BBS-7 is activated when the upper three
address bits are active for addresses greater than 160000 which is IO
and boot address space. Next question about RAMs: I do have some QBUS
Memory boards with PMI
connectors (M6708, NatSemi NS638, Chrislin CI-MV8 to be concrete) does
anyone know if I can use one of them with the KDF11 (or at least the
KDJ11?) I hve a KA630 too, but I need PDP11 RAM, the 16KW on the M8047
is really a bit small....
PMI can be used with KDJ11 if its the right PMI. KA630 is not PDP11 but it
is microVAX. I have soldered an additional Megabyte to the KDJ11
and it has now 1,5MB,
which is enough tu run 2.11BSD, therefore I don't have tried to use one of
the memory Boards additionally until now.
Generally all the PDP11 OSs run in 512Kb or less. You have enough to be
useful.
Hope that helps. All of my Qbus systems (LSI-11 through J11) Use QBus
memory
as none of my CPUs require PMI.
I do have several Qbus MicroVAX-II and those do use PMI but different
part than PDP11.
The memories
at least the M7608 (you did mean 7608 and
not 6708?) is microVAX memory and incompatible with PDP11 cpus.
Oh yes. This was a
Typo, I meant M7608. I have two a 2MB and a 4MB Version.
M7608-AA MS630-BA Q 2-Mbyte RAM for
microVAX II (Q-22 via CD)
(Also M7608-AC, -AE, -AH, -AL, -AP, -AR, -AS,
-AT,
-AU, -AV)
Thx, but I already knew them.
That's new to me, thx.
Next question is about an M7656 Graphic board
that I have laying around
here. Where was this used and are there any docs available?
It was used with the MicroVAX as part of the workstation configuration.
You will have to search though the MicroVAX manuals for more.
(check bitsavers).
Links to looks at:
http://www.pdp11.org/
Many links and good info.
http://www.strobedata.com/osprey/module.faq
This has the DEC module filed guide to translate module number to what
it is.
http://www.fpns.net/willy/pdp11/pdp11.htm
Allison
> Regards,
>
> Holm
Kind Regards,
Holm