I?ve just come into possession of both of these units.
The Mac has a 20MB internal HD and doesn?t startup. There is no happy mac or boot chime. The video is just a single line in the middle of the screen.
The HDD spins up and wants to be formatted by any Mac I?ve got that has USB on it.
If anyone wants either of these let me know (San Diego area of California). If I hear nothing both will go to the electronic recycler next Saturday.
David
Hello,
I also have a bunch of manuals, mainly for rt11, which aren't available in
bitsavers.
I always thought of bitsavers as the "whole" archive for DEC stuff, however
time ago, sorting these manuals, I found they where available only on Manx
or Antonio Carlini's archive.
Many manuals then are available on other sites, etc
Now the question: why collected manuals from other sites couldn't be added
to bitsavers too?
Thanks
Andrea
Today I got home and my Mouser order had arrived. I soldered in the new
6-position DIP switch and popped a new 1488 in the socket. Nice RS232 data
coming out... for about 10 seconds, then the transmit data line went to
around +2 volts and stayed there. WTF. Tried another one, same thing. Went
back to the first new chip, same thing - so it's not blown (and maybe the
old one wasn't either).
OK, it has to be the power supplies. Again.
Sure enough, +12 was sinking slowly until it was near zero at which point
the RS232 output basically went floating...
This looked familiar and it didn't take long to discover that the CT on the
transformer for the + and - 12 volt supplies was open again!! This time it
was the wire from the transformer broken as it entered the Molex connector.
Fixed that, back in business. I am amazed that none of the epoxy drop
tantalums on the high leg with the open neutral have blown. Maybe they're
open circuit :)
Also I don't know what gorilla at the salvage place was
connecting/disconnecting until he found a combo of base, board and monitor
that worked.
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I have a full book case of DEC binders, each containing one or more
manuals. I went through the lot of it this evening and checked to see
what was on bitsavers. It seems an awful lot of it is not available. I
cannot bring myself to dispose of any of it until it is digitised, but
keeping hold of this much paper is not practical for me.
I'm going to try to scan as much as I can. The full list of what I have
is available at the link below. It is mostly mid 1980's VAX/VMS
stuff.. If anyone would like one of the manuals for the cost of
shipping, I'd gladly send it over to you.
http://aaronsplace.co.uk/dec-manuals.html
*** If there is anything you consider a priority in terms of being
scanned, please let me know and I'll try to do it sooner, rather than
later. ***
Finally, I'd like to mention that these manuals came from a friend,
Marc, who passed away early last year. Marc used to be somewhat active
on this list (more so the #classiccmp IRC channel). A friend of Marc
will be participating in a walk for the Campaign Against Living
Miserably (CALM) charity. If anyone is willing to donate (even a small
amount), it would mean a lot to me. CALM is a charity supporting men who
suffer from depression - one of the leading killers of men under 45 in
the UK.
https://www.justgiving.com/fundraising/losthourswalk2019inmemoryofmarc
Many thanks,
Aaron
> But then it turned out not to be the load at all. No matter what I ran
> on that Pi, it would corrupt its SD cards in a matter of weeks (the
> symptom was that the fourth bit of some bytes would just stick on). I
> assume it was just something broken in the Pi itself.
You can simply root off of a USB disk by changing the "root=" parameter in
cmdline.txt on the FAT partition on your SD card. Since the card won't
otherwise be used unless you mount it if you do this, your next card
should last forever. I've got a Suptronics x830 board and enclosure with
an 8 TB drive which boots this way.
Any Pi processor newer than the original ARM1176JZ should run NetBSD
pretty well. My 900 MHz Pi 2 runs NetBSD/vax almost as fast as a
VAXstation 4000/30 (VLC), which is about 5 VUPS. An original Pi or Pi Zero
should be able to emulate a VAX at least as fast as an 11/780.
One issue with CPU intensive things on Raspberry Pis is that even if your
power supply provides plenty of current, the slightest drop in voltage can
cause throttling. If you know your power supply is good but see a
lightning symbol anyway, add "avoid_warnings=2" to config.txt on your SD
card's FAT partition.
John
Well, I knew the computer, just not the city.
It's Zell am See, a small town in western Autria, far from everywhere it seems.
The computer is a Datapoint 2200 - 50lbs, 10x19x20 inches.
I want to get it shipped to Calfornia, where I live.
The cheapest option is to just use local Austria mail, but max dimensions are 60x60x100cm, or
23.5x23.5x40 inches. That would leave just 2-inches on each of two sides for padding.
Best option - remove the plastic cover and mail it separately. Correct me if I'm wrong, but the entire bottom of the computer seems to be a solid piece of metal, like the Apple III = very strudy. The back is a giant metal heat sink.
I think it's do-able, do you?
Steve.
> From: Jon Elson
>> On 08/22/2019 12:47 PM, Tom Uban via cctalk wrote:
>> On a possible related note, I am looking for information on converting
>> CISC instructions to VLIW RISC.
> I think it might end up looking a bit like the optimizers that were
> used on drum memory computers back in the dark ages.
I dunno; those were all about picking _addresses_ for instructions, such
that the next instruction was coming up to the heads as the last one
completed.
The _order_ of execution wasn't changed, there was no issue of contention
for computing elements, etc - i.e. all the things ones think of a
CISC->VLIW translation as doing.
Noel
On another mailing list, someone asked if there was any list specifically
about bit-slice design and microcoding. I don't know of one, so I've
created a new mailing list specifically for those topics:
http://lists.brouhaha.com/mailman/listinfo/bit-slicers
The intent is for the list to cover technical discussion of bit-slice
hardware design and/or microcoding. In other words, discussion of
microcoding that doesn't use bit-slice hardware is fine.
> From: Ethan Dicks
>> Speaking of KE11-A's, does anyone know what's behind the bidding wars
>> on recent eBay KE11-A component board listings, e.g.:
>>
>> https://www.ebay.com/itm/372685033144
> Perhaps someone has a broken KE11-A
Must be two such people, though - I was neither of the top two bidders.
Odd for there to be so much interest in them.
Noel
