test-drb July 2001

test-drb@ccmp.vtda.org

301 participants
824 discussions

building a PDP11 from the things you find at home

by dhquebbeman＠theestopinalgroup.com

> > As far as you can build a mainframe from the things you find at home... > > > > It's pretty true if you start with Simh26... PDP11, PDP8, PDP10. > > No, not an emulation, a real machine.... > > Actually, round here, you probably couldn't run the emulator (and > certainly not at any reasonable speed) on any of the machines I own. But > if you dug about a bit, you might find enough parts to make at least a > minicomputer from scratch... Tony- I'm running SIMH on a 233MHz Pentium-1 with rather good response. At least, TOPS-10 seems as fast as it was at university loaded with students... Regards, -doug q

22 years, 11 months

hayes chronograph

by pete＠dunnington.u-net.com

On Jul 25, 14:54, Iggy Drougge wrote: > I don't know what it's like in your part of the hemisphere, but there's an > atomic clock down in Germany which broadcasts its time. IUt's quite easy to > obtain clocks which rely on its signal, and I've seen designs for a similar > cartridge for the Atari ST. Can't remember whether it plugged into the > parallel or cartridge port. > Hmm, sounds very much like something that would be printed in Elektor or C't. Elektor did indeed publish a design -- in fact, more than one -- some years ago, and other magazines have, too. The transmissions are pretty low frequency (low end of long wave: 60kHz) so a receiver has to be accurately controlled if it's going to work - most use crystal control. > Anyway, that should be the optimal timekeeping device, assuming you can come > up with the hardware and that you're within reach of the transmitter. The German one is DCF at Mainflingen (IIRC) and there's a similar transmitter (MSF) at Rugby in the UK. There's at least one in the US (Colorado) as well. See http://www.npl.co.uk/npl/ctm/electronic_projects.html for some ideas. One of my erstwhile colleagues built a very nice receiver with an active aerial (the signal is easily interfered with by other LF sources, eg computers) and a Z80-based decoder driving a cuckoo clock (yes, with a wooden cuckoo behind door, that comes out on the hour, and by courtesy of a speech synthesis routine, says "At the third stroke, the time will be .... KOO-koo .. KOO-koo .. KOO-koo". He had an eccentric sense of humour :-)) The clock is still used to provide time service accurate to a few miliseconds across campus. His web pages are no longer around, I think, but similar designs are to be found at http://www.nukem.freeserve.co.uk/contents/electronics/clock/ and several other places. -- Pete Peter Turnbull Network Manager University of York

22 years, 11 months

building a PDP11 from the things you find at home

by dhquebbeman＠theestopinalgroup.com

> --- Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> wrote: > > > Anybody have MDL compiler? I'll get back into PDP-10 hacking if I can > > > find one. > > > > There's been discussion about it over on alt.sys.pdp10; not being a > > Zorkaphile, I haven't been following the discussion very closely... > > Thanks. I have access to an XKL-10 for regression testing of my zDungeon > port of Zork to the Inform language, but the binary I have is several > puzzles out of date (no Royal Puzzle, no Canary, no Bank, and, a few more). > It's about 18 months older than the final version that was cut before > the crew left to found Infocom. > > Of course, if anyone has a newer binary of Zork for the PDP-10, I'd welcome > that, too. > > I'll go check out Deja.com and see what I can see on it. > Thanks for the tip. Better purge those deja.com links before they go stale... point yourself instead at: http://groups.google.com Regards, -dq

22 years, 11 months

HP 300 (was: "what the hell")

by dhquebbeman＠theestopinalgroup.com

> On Thu, 26 Jul 2001, Stan Sieler wrote: > > > The CPU was CISC, silicon-on-saphire, and > > What a very interesting little machine. I am most intrigued. > What do you mean by "silicon on saphire" though? I wasn't following the earlier part of this, but chips that are bound for use in satellites often use sapphire as the substrate... something to do with resiliancy in a high cosmic-ray environment... -dq

22 years, 11 months

machine appraisals

by tdilliga＠ilm.com

Is there any sort of group that does machine appraisals? I have a Tektronix 4054 which I picked up a couple of years ago by accident and am interested in getting a general idea of what it is worth. The machine is in good shape with some scratches and damage to the enamel, is clean on the inside, and works. I do not have documentation or any peripherals. >>>Tom

22 years, 11 months

SGI Indigo keyboard?

by marino13＠btinternet.com

Hi all... Anyone got a spare keyboard and mouse for an SGI Indigo Iris XS24? Its a fairly specific one, different to the later machines in that it supported a pass thru for the mouse actually ON the keynoard, kinda like a Mac does. Any leads would be appreciated Shaun

22 years, 11 months

building a PDP11 from the things you find at home

by dhquebbeman＠theestopinalgroup.com

> --- Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> wrote: > > I'm running SIMH on a 233MHz Pentium-1 with rather good response. At > > least, TOPS-10 seems as fast as it was at university loaded with > > students... > > > > Regards, > > -doug q > > Anybody have MDL compiler? I'll get back into PDP-10 hacking if I can > find one. There's been discussion about it over on alt.sys.pdp10; not being a Zorkaphile, I haven't been following the discussion very closely... -dq

22 years, 11 months

Hackers: Computer Outlaws revisited

by dhquebbeman＠theestopinalgroup.com

> > Kevin Mitnick is a CONVICTED criminal, and has ADMITTED criminal > > behaviour. I don't get teary-eyed thinking about the time he spent in > > prison before the trial. He was a proven flight risk (he ran away > > once, and hid out in Denver). > > Me either. But then you forget just how badly the US Gubment violated his > civil rights. I don't know who's the bigger criminal in this case: > Mitnick or the Government. And believe me, I fear the Government WAY > more than I fear Mitnick. The Government is everywhere, and much more > powerful. Righto. I can think of some terrible things that might justify violating a citizen's civil rights; electronics sabotage is not, hwoever, amongst them... > > PS I daily have probe attacks on my DSL system from script kiddies > > looking to add another machine to their DDOS attack farm. > > Yeah, me too, but I don't obsess over it. I just make sure my security is > tight and worry about more important things. Yup. -dq

22 years, 11 months

Fun "events" for VCF

by dhquebbeman＠theestopinalgroup.com

> --- Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> wrote: > > > > > > > > Vintage geek clothing contest. > > > > > > > wear... a t-sheet... > > > > -dq > > Is that what Roman Geeks wore? only when in posse mode, and only when roman' [sic] the food court... ;-) -dq

22 years, 11 months

OT: Hackers: Computer Outlaws revisited

by dhquebbeman＠theestopinalgroup.com

> You would FAX a credit card or account number? Why not just buy a billboard > for it somewhere. I haven't had a chance to ask him yet, but my former sociology professor has *every* piece of confidential information you'd normally expect people to protect openly listed on his web page. I'm sure he's trying to make a point; eventually, I'll ask... -dq

22 years, 11 months

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test-drb July 2001