20 Mar
2007
20 Mar
'07
8:05 p.m.
On 3/20/07, David Betz <dbetz at xlisper.com> wrote:
I'm starting to collect some qbus equipment again
and am trying to
setup a system around a KDJ11-AA CPU.
My current configuration is:
BA23 enclosure
KDJ11-AA (m8192)
MSV11-QC (m7551 cf)
DZQ11-M (m3106)
RQDX3 (m7555)
TQK50-AA (m7546)
A nice, basic setup - CPU, memory, serial, disk, and tape.
First, will it be possible to boot this configuration?
Can I setup to
start the KDJ11 in ODT mode and enter a bootstrap for the RQDX3 by
hand? How long a program would I have to enter?
The MSCP boot is dozens of bytes, but it can be entered by hand (or
from a computer over the console port)...
Also, I've done a Google search but have been
unable to find
documentation on how to configure the DZQ11 module.
I think someone else pointed out the manual on bitsavers, but I don't
ever remember having to configure one - we never needed a second one
in any MicroVAX or MicroPDP I ever worked with - we just had DZQs
lying around set to the defaults.
I'd like to configure it so that I can use one of
its ports as the console port
for ODT. Is that possible?
I do not believe that's possible. Back in the day, the DLV11J was
commonly used for console plus 3 serial ports for printers and what
not. I tended to see the DZQ11 on systems that had a console port
(MicroVAXen or MicroPDPs w/serial on the CPU) and for interactive
terminals plus maybe a serial printer. The default strapping for a
DLV11J was to have one of the SLUs at the expected console CSR and
vector, but some flavor of DLV11 (DLV11E?) could provide a console
serial port on a dual-height card (but only one port on that card).
I'm planning on using a Maxtor XT-2190 190mb hard
drive. If that
won't work, I have a number of RD53 drives I can use instead.
That should work fine with the RQDX3, as long as the drives were
previously formatted on an RQDX3 or if you can boot XXDP's low-level
formatter. I've never done it from a PDP-11, so I don't recall the
XXDP module name (I've always done it from either a MicroVAX 2000 or
from a MicroVAX II w/Field Service Diagnostics).
If your drives are ready to go with an RQDX3, you can plug them in,
boot from floppy or tape, and load an OS.
Is this a workable configuration or do I need a boot
module like the
MXV11?
I never had one but IIRC, the MXV11 can give you both a bootstrap and
a console. You could also install a dedicated console serial board as
described above, and type in/download a bootstrap. Off the top my
head, all the later PDP-11 CPU boards had a built-in console and
second serial line, but the KDF11-A and KDJ11-A did not. Those tended
to use either an MXV11 or a DLV11J + BDV11 boot/terminator.
-ethan