On Thu, 4/18/19, dwight via cctalk <cctalk at classiccmp.org> wrote:
> My understanding was that the mercury delay lines
> needed periodic repairs ( not sure what the cause
> was but mercury does dissolve into many metals ).
> If I were going to make a delay line memory, I'd go with
> the magnetostrictive. These are practical to make. One just
> needs a little ingenuity and a spool of piano wire.
> Dwight
Or still do a fluid one, but take Turing's suggestion
and use gin as the medium.
BLS
?Hi friends. I am putting together a PDP-11 set up. i have a few CPUs available to me, a 11/23+, an 11/73 and I also have available to me an 11/83, M8190-AE .
I would like to try to run as many different OS's as may interest me, including some unixes as possible (bsd...etc). My question is, are there any OSes that need the floating point option?
Another question is, would I see any improvement in performance with the FPU compared to without it? Or does the application running need to be something like fortran to see any perceivable difference?
Thanks
I am selling an Atex PDP-11/34. The computer has: J11 CPU, 11 MB RAM, 2
BA11-LE expansion chassis, a second backplane, an SMD disk controller and
LAN hardware.
Items are all untested, sold as-is.
Local pickup is preferred, but I will consider shipping freight.
Please make an offer on the whole machine, or any piece of it.
> From: Charles Morris
> it appears that the RXV21 will only work with an RX02 drive...
So an RX02 can be jumpered to work with the non-DMA RXV11; but the DMA RXV21
can't be configured to work with an RX01. Which of these two is a more
interesting/useful thing to be able to do?
People at MIT used to theorize the existence of a virulent biological virus,
'Honeywell Brain Damage'; I wonder if there's a DEC mutation?
> Just wondering what my options are for hooking up any kind of floppy
> drives. I could sell the RXV21 and buy/trade for an RXV11 (M7946)
> instead
Those used to be fairly common on eBay for not many dineros; I only see
one moderately expensive one at the moment, though. I'd definitely go
this way, though - maybe Paul A has one available?
Noel
I have a Dilog CQ-1610 serial line card (16 ports!) that I'd either like to
sell, or at least put it in my backplane and play with it since I have a
copy of TSX+
:)
But I can't find any info, especially the DIP switch settings. All I see is
"emulates a Unibus DH-11" but that is not even close for hardware/layout.
Any thoughts?
thanks
Charles
It is in a? metal? suitcase appears? to? be? military analog? computer Ed!
In a message dated 4/15/2019 11:52:41 AM US Mountain Standard Time, cctalk at classiccmp.org writes:
On 4/14/2019 5:44 PM, Sam O'nella via cctalk wrote:
> Is there a specific reference you have for this?
>
> Sent from my Apple /////c
>
>> On Apr 14, 2019, at 2:16 AM, ED SHARPE via cctalk <cctalk at classiccmp.org> wrote:
>>
>> "arx-149"? computer. .. what Is?thanks ed#
>
I'd like to know too. I never could quite understand just what Marvin
The Martian said. " The *** 32 * **** um *space ** xx ** later *, :)
Unsurprisingly the DEQNA card in my PDP-11/73 is quite unstable and
results in 2.11BSD panicing. Is there anything that can be done about
this? Other than unplugging it that is... I don't think there very much
broadcast traffic making its way to the PDP. It's usually when I'm
transferring files.
If not, does anyone have a DELQA card they would be willing to part with
(preferably in the UK) for a sensible price?
Thanks,
Aaron.
--
Aaron Jackson - M6PIU
Researcher at University of Nottingham
http://aaronsplace.co.uk/
