> From: Rod Smallwood
> 4. I need a tried and tested list of step by step instructions to
> put RD54.dsk on the SCSI drive.
Well, this isn't a list of directions, but... I've had good luck doing
almost this exact same thing (on a Windows XP box, copy a filesystem in
Windoze file onto a device, in my case an SD card on a USB adapter) with
'dd for Windows', available here:
http://www.chrysocome.net/dd
The command line I've worked out to use is:
dd-removable if=UnixRoot of=\\?\Device\Harddisk2\Partition0 count=4872 seek=131072
I don't recall the exact procedure I used to generate that, but I'm pretty
sure it involved the use of the "--list" command to 'dd', to get a list of
the devices on the system. (The "4872" is the size of the RK pack,
obviously.)
I'm using dd-0.6beta3.zip but there may be a later version that works too.
Noel
Hi all --
Curious if anyone has a spare L0022 memory controller, this allows a
VAX-11/750 to address up to a whopping 14mb of memory (2x4mb, 6x 1mb
boards). I found a couple of the 4mb boards, now I just need to upgrade
the memory controller to be able to use them...
Thanks as always,
Josh
> From: Jon Elson
> Yes, this is most likely a bus timeout
The good news is that it looks like his CPU is 'mostly' working; and if
the NXM is due to a fault on the CPU (e.g. bad bus transceiver sending
the wrong address), that would be fixable (it uses 8641's).
If the fault is in the DLV11-E (and not just misconfiguration), depending on
where the fault is, he might be out of luck with that card; it uses DC005's
for transceivers, which of course are unobtainium now. Still, QBUS serial
interfaces are not rare.
And overall, progress is being made! :-)
Noel
Hi
??? I am working on getting my KDJ11-E based system up.
I have a CQD220A and a SCSI hard drive installed and formatted.
A serial connection to a Raspberry Pi soon brought up the console on the
PDP-11 using TU58FS.
Next will be a second serial line to allow TU58 emulation. SFSG
What is not clear is if I can get a bootable OS (RT, RSX or whatever)?
image onto the Hard Drive using TU58FS.
Any advice as to if and how this could be done would be greatly
appreciated .
Rod Smallwood
--
I took a better picture of the panel for this yesterday
http://bitsavers.org/pdf/dlcCompany/cowculator
Other than a couple of want-ads from the early 60's I've
not been able to turn up any more information on this.
I'm assuming you optimize by adjusting the parameters to
zero on the meter.
Other than what is on the panel, I've not found anything
on the DLC Company in Linthicum, Md.
The discussion on raised floors in data centers reminded me of an interesting past experience. My company had installed its first supervisory process control system in an enzyme plant. The plant had been around for quite some time and the process control system was part of a retrofit of the facility. Part of that retrofit was remodeling a room for the PDP-11/44 and the related racks of industrial controllers. There were hundreds of cables carrying various analog and digital signals and control signals under the raised floor that they installed.
The only bad thing about the location of the data center was that it was directly under some tanks that were installed on the roof. One tank was for concentrated sulfuric acid which was used to adjust pH in the fermenters. That acid tank was filled from tanker trucks that would come from time to time. One day a trucker who was filling the tank was not paying attention and over filled the roof tank and acid overflowed over onto the roof which should have held the overflow, but it was a flat roof designed to protect from rain not concentrated sulfuric acid. Down in the data center the operator noticed that liquid was flowing down the walls of the room and past the raised floor tiles into the space below. It was easy to confirm it was acid since it was attacking the paint on the wall. The acid pooled under the floor with the cables.
That was when they called the research chemists next door. We came in and determined that there were some drains under the floor (it had been a factory room before it was converted) and we suggested that they flush the space under the floor with water to dilute the acid to get as much of it out as possible. Then they used fans to try to dry out the room and the space under the floor.
After all this, miraculously everything seemed ok, but about once every 6 weeks or so that PDP-11/44 would develop some issue and the DEC field service guy (it was under contract) would come out and swap a board or two, marveling at how he had never seen boards that were so corroded. In retrospect I?m amazed that 11/44 survived as well as it did.
Mark
I have an old floppy disk drive by Hewlett-Packard, their 9895A Flexible
Disc Memory. We got this from an estate cleanout and I would like to sell
it. It has been powered up and one bay door works when the button is pressed
and the other doesn't. It is a large, very heavy machine. I have it on ebay
for $299 ( <https://www.ebay.com/itm/254242280384>
https://www.ebay.com/itm/254242280384) but that was just a shot in the dark.
Any reasonable offer considered.
Mark
mark at meba.com
