On 8/3/2023 3:45 AM, Joshua Rice via cctalk wrote:
>
> I’d still prefer the IMSAI 8080 or SWTPC 6800 though.
>
While I have a couple Apple ]['s I really don't do much with them. Haven't
even turned one on since I retired from the University in 2015 and they
came home .
Wouldn't take an Apple 1 as a gift but I, too, would love to have an IMSAI
and a SWTPC 6800.
bill
I have heard rumors of one "fredmacs" which is a more-or-less emacs that
will run on PDP-11 v7 Unix. Since I've gotten "s" onto v7 and behaving
mostly happily, now I'd like an editor I actually _like_ rather than
_tolerate_.
Does anyone know where to find the fredmacs sources?
Adam
Hi all,
I just came across pictures on the LCM website about their SDS Sigma installation there.
On the pictures, one can see 10-platter disk packs in the corner and stored on the disk drives.
Did the LCM ever had these in operation, either for data retrieval or even demo purposes?
I know of the Jim Austin Computer museum where they fixed a CDC 9766 drive but it suffered
a head crash after a few hours according to their description which led to giving up the operation
of these drives.
Greetings,
Pierre
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http://www.digitalheritage.de
Hi there
I recently had a mad hankering to add a SunPC card to my Sparcstation. A lot of you will be familiar with the SBUS cards with a 486 or '586' processor.
Does anyone have one spare they would like to part with? Please PM me if you do.
Anything really not at all fussed.
This sort of re-creates a setup I had as a post graduate when I had a new 486DX2 alongside a Sparcstation 2, or at least had access to them. Both were pretty amazing machines at the time.
I do remember benchmarking these two machines running similar C software I'd compiled up (a simple electromagnetic simulator), and it was noticeable that the sparcstation was at least twice as fast.
Hello all. I looking around for a Logic Analyzer for doing (mostly) DEC QBus/UniBus stuff. Being the way I am I want something with enough lines to handle the most of the signals so I'm guessing something with roughly 80-ish channels. I think that lets out all/most of the USB based LA. I've looked around and it seems the the HP/Agilent 16700 series (16700B/16702B) are probably what I want. I've also seen the 1670G which also seems quite doable. I've seen a lot of posts at the EEVblog and it seems I missed possibly the golden age of 16700 LA by a few years price-wise.
What I'm wondering is if there is something specific I should be looking for, or opinions on which LA is more suitable. Or even if there is a different make of LA to look for.
Thanks in advance for your help
John H. Reinhardt
Hello All,
I am working to get my two microvax systems working, I have a couple of
microvax 3800 systems.
While I am waiting to get the real hardware going, I would like to set up
simh with vms to use for testing.
I don't really need the latest version of vms, any old version with tcp/ip
would work. I do have about 16 dumb terminals i want to run as a lab and
connect to the vax.
Can anyone provide guidance on this matter for setting up and install of
VMS in sinh? I realize that there was the openvms hobbyist program, but i
may want to grab an older version of the os if it will run smoother on the
older hardware.
Open to suggestions, I hope to post back with some pictures once the real
vax 3800 hardware is running.
Thanks,
Devin D.
To clarify a couple of things in response to queries: my time for
divestment is "not yet"--but rest assured, when it arrives, I will
certainly see who wants things from my assortment (don't get too excited;
there's nothing super-rare or valuable in it, and I've always been more
concerned with restoring functionality than maintaining period-correctness;
I am one of those collectors who restores stuff to play with it, not to
then put it in shrinkwrap and preserve it for some uncertain future). And
should that time arrive suddenly, well, argh, I've been putting off making
a will too long, but I know who I'm going to put in charge of "everything
computery," and I trust her to make good decisions about the things she
doesn't want.
My understanding of sqlite (and it could be wrong) is that concurrent
writes aren't supported, and reads should block if a write is in progress
until the write completes. In practice it seems like most things are
one-sqlite-file-per-process and if that process is threaded, one would hope
the programmer understands what they're doing well enough to make it work.
There are fairly few cases I've seen where a single sqlite file is shared
between unrelated processes, which would take filesystem locking working
correctly to ensure correctness. Which is generally OK for local
filesystems, but NFS is still a bucket of worms when it comes to locking
behavior, and the number of people running systems that genuinely
understand NFS has been declining for decades. (I do not count myself
among those people.)
I have a Gesswein MFM emulator from decromancer.ca; who offer an adaptor that yields a 2nd MFM data connector.
I'll use mine in a Microvax 2000. Does anyone know how to hook it up as two MFM drives in a Microvax 2000?
The vendor sold a 1in high adaptor box, BA40A, with DD50 connectors to a second cabinet (same as CPU box) for a second drive.
DEC configured both primary and secondary drives identically (drive 3, IIRC). The Microvax 2000 Technical Manual gives the pinout from the mother board to the MFM/floppy daughterboard, but I can't find the pinout from that daughterboard to the cables anywhere.
I've been looking for a BA40A, for some years now, to trace the pin layout for a 2nd drive. Does anyone know it?
Has anyone successfully configured a single MFM emulator as two MFM drives in a Microvax 2000? Or to an RQDX3?
Been thinking about it a little recently, and, no, I definitely don't plan
to send my stuff to a scrapper. I have some younger friends with an
interest in retrocomputing. They want my stuff when I'm done with it,
sure. And if they want _just a little_ of my stuff I'll probably strike a
deal like, "you can have the SGI Indy if that box of IDE drives goes with
it, and you aren't allowed to throw it away until you're somewhere I'm not
going to see it by the side of the road."
Adam
