Hello to the group,
I have acquired some boards and a backplane for a PDP 11/23+. The disk
controller is an RQDX3 and I have a 3.5" drive that works as an RX50. I
have a greazeweasle so I am able to write RX50 images to 3.5 inch
floppies. I also have an RD32 MFM drive that also works.
Since I have an M8189 CPU board, I have a second serial port that works as
a TU58 device so I can use the tu58em emulator. I also have 512K of memory
and a DZV11. Using the TU58 emulator I have been able to get RT-11 up and
running on it.
My goal though is to try and get RSX11M (I have no FPP right now) on it,
but I am somewhat at a loss on how to get it installed. Anyone have any
suggestions on how I could do that? I have some .tap files and some RL02
images with various versions of RSX11M, but I don't know how to get them
onto my RD32 drive.
Thanks in advance for any pointers or suggestions.
And let me just say I love finally having a real PDP11!!
-Peter
Hi all,
after approx 30 years of waiting our time has come to get hands on a Cyber 180/860a.
These systems as other systems before are using 400Hz psus.
One approach would be to use a 50Hz/400Hz power converter. There are ones on the market creating almost pure sinus output with minimal harmonics.
Another approach would be to substitute the old psu by modern ones, possibly by DC-DC converters or switching powersupplies.
Does someone have experience in the substitution of psus in the multiple KW range or did this in the past?
Best
Andreas
Hi all,
I do see a lot of CDC documentation on bitsavers like software, hardware
concepts, programming concepts, but no logic diagrams, schematics, detailed
assembly etc.
Didn't publish CDC logic diagrams, schematic, board layouts etc, esp. of
course for the 180/8xx series in the past - wasn't such kind of docs ever
available?
A.
1945 - 2024
Found dead 10/11/24 in a "wellness check".
Little or no other information yet.
Ward Christensen created the first "BBS".
Then, when he needed to transfer files, he created XMODEM. The XMODEM
protocols became the de facto standard for transferring files.
Later, there was some competition from Kermit, but, other than being "FROM A
UNIVERSITY!", it wasn't nearly as good.
Not only are all of the greats dying off, but soon there won't be anybody
around who even knew about them.
--
Grumpy Ol' Fred cisin(a)xenosoft.com
Next try …
https://flic.kr/s/aHBqjBMV48
A.
> Am 15.10.2024 um 15:28 schrieb Milo Velimirović <milovelimirovic(a)gmail.com>:
>
> The photos didn’t make it through. I’ve got a pdp11/05 that I’d like to restore and new PSUs make total sense to me. Please send photos directly.
>
> Thanks!
> —Milo
>
>> On Oct 12, 2024, at 6:35 AM, hupfadekroua via cctalk <cctalk(a)classiccmp.org> wrote:
>>
>> Hi all,
>>
>> Once I visited LCM some years ago I was allowed to visit their repair laboratory.
>>
>> I was introduced to an approach to substitute DEC BA11 PSU modules by modern DC-DC converter modules.
>>
>> They used a 3D printed plastic chassis to mount the converter, electrolytic as well as the connectors to be fitted into the psu chassis of a BA11 enclosure, quite nice.
>>
>> See photo attached …
>>
>> Does someone knows if this stl or design has been saved while or after LCMs closure?
>>
>> Best
>>
>> Andreas
>
Hi all,
Once I visited LCM some years ago I was allowed to visit their repair laboratory.
I was introduced to an approach to substitute DEC BA11 PSU modules by modern DC-DC converter modules.
They used a 3D printed plastic chassis to mount the converter, electrolytic as well as the connectors to be fitted into the psu chassis of a BA11 enclosure, quite nice.
See photo attached …
Does someone knows if this stl or design has been saved while or after LCMs closure?
Best
Andreas
> Oh, my, of course yes.
> This is sad news. I wonder if I can talk my editor into a belated
> obit? I feel too ignorant though...
I guess you could try
I'm a nobody but De Castro was important
First person (I think) to put a whole CPU on a single card, at least in a mass-produced machine
