test-drb March 2012

test-drb@ccmp.vtda.org

189 participants
239 discussions

by holm＠freibergnet.de

So far as I know this is MIDI ofer an arduino board: http://www.youtube.com/watch?v=Xk_XaJ7gE4Q Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741

12 years, 1 month

Machine to identify

by alberto＠a2sistemi.org

I've to identify this machine. No label, no data on it. http://www.fondazionegalileogalilei.it/museo/collezioni/calcolatori/mini _pc/img_mini_pc/57_patent_pending.jpg Someone know this machine ? Alberto ------------------------------------------------------ Alberto Rubinelli - Fondazione MUSEO DEL COMPUTER Onlus Via Costantino Perazzi 22 Tel 0321 1856032 28100 NOVARA (NO) - ITALY Fax 0321 2046034 Mobile +39 335 6026632 Sito web : http://www.museodelcomputer.org Mail : alberto at museodelcomputer.org Filiale di Torino : Tel 011 23415829 Filiale di Roma : Tel 06 98357066 ------------------------------------------------------ Le telefonate con numero nascosto sono filtrate Calls with no caller identifier are filtered ------------------------------------------------------

12 years, 1 month

Pertec interface

by elson＠pico-systems.com

Well, I am chugging along on this project. After fixing a few bugs, I now have a program that will read single blocks off the tape. Somewhere the docs got confused, they say that bit zero is MSB and bit 7 is LSB, a la IBM 360. But, the data I am getting is clearly the opposite bit order, so I will reverse that. Also, I am not detecting file marks, but see a block with zero length. So, I need to look at that. Could easily be a wiring error. But, I manually reversed the bits and I get VOL1 and HDR1 records of 80 byte length, and then data records of 8192 length. So, with just a little bit more tinkering, I think this thing is going to work. It IS a nightmare, with a 44-pin TSOP memory chip glued upside down on a piece of perfboard with wire wrap wires soldered to it. It was the only suitable memory chip I could find. 64K x 16, I'm only using one byte worth. Jon

12 years, 1 month

Rosewood

by robert.jarratt＠ntlworld.com

> -----Original Message----- > From: cctalk-bounces at classiccmp.org [mailto:cctalk- > bounces at classiccmp.org] On Behalf Of Mouse > Sent: 29 March 2012 05:13 > To: cctalk at classiccmp.org > Subject: Re: PDP-8 questions > > > cylindrical volume of about 50 cubic metres for one tree. Let's say > > that one person wants a piece of rosewood that is 50cm x 50cm x 1cm. > > That is 0.0025 cubic metres, so a single fully grown tree would > > satisfy 20,000 people once a year. > > That's assuming that (a) all the pieces can be fit into the tree's volume with > no waste, (b) nothing is lost in cutting them out, and (c) any part of the tree > is perfectly suitable for any use. Neither (a) nor (b) is likely to be true, and, > while I don't know rosewood, I know that with the woods I do know > something about, (c) is not true. > > I have nothing but wild guesses as to how much is wasted; for what it's > worth, my wild guess is that the wastage is at least half the volume. > > /~\ The ASCII Mouse > \ / Ribbon Campaign > X Against HTML mouse at rodents-montreal.org > / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B Yes, two people have challenged my assumptions. That is to be expected really as I am no expert on wood. It was just about getting an approximation to show that the "how can little old me really make a difference" attitude *can* make a difference when there are a lot of "little old me's". I am sure that the yield is far from perfect, but I was just trying to show that even with some fairly optimistic assumptions this attitude can have a big effect; if yield is 50% then the figures double etc.... Regards Rob

12 years, 1 month

OT: Family health issues (was: Re: another hidden pdp11)

by mtapley＠swri.edu

At 1:13 -0500 3/29/12, Tony wrote: >s/pub/hospital/ I'm really sorry to hear that, Tony. You have our sympathy and best wishes for a speedy and complete recovery for your father. Is there anything else any of us can do? -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

12 years, 1 month

PIXAR Image Computer Panel Museum Display on Ebay

by nick.allen＠comcast.net

PIXAR's first computer used to make portions of the 3d short (Red's Dream) is now on Ebay (wife refuses to let me keep it and hang it on our wall). Thought you might be interested in it, here is the link: http://www.ebay.com/itm/PIXAR-Image-Computer-Panel-Framed-Museum-Piece-RARE… <http://www.ebay.com/itm/PIXAR-Image-Computer-Panel-Framed-Museum-Piece-RARE…>

12 years, 1 month

twinax cards, linux, and hercules

by dgriffi＠cs.csubak.edu

A question for those of you who play with Hercules... Are twinax cards supported under Linux such that a 5250 terminal can be connected and work? -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

12 years, 1 month

PDP-8 questions

by djg＠pdp8online.com

Not sure how separate classicmp pdp8 readers are from alt.sys.pdp8/pdp8-lovers readers so trying here also. Nothing new if you saw it previously. Does anyone have 4k BASIC or Spacewar? Poly BASIC, DECUS 8-195 seems to be 4k. I think Edusystem 10/15 BASIC also ran in 4k. I think there also was a 4k Poly Spacewar. I have this one which is 4k but it doesn't have gravity etc. / SPACE WAR / / INTERPLANETARY DEATH AND DESTRUCTION ON YOUR / LAB-8 / / EVAN SUITS My desktop straight 8 is missing the wood side panels so I want to make some. I took pictures and measurements of MARCH's but I can't remember if they were real wood veneer or imitation laminate. Does anybody know more or can look closely at their's? Online seems to think it was rosewood but doesn't say if it was real wood. One reply on pdp8-lovers said the desktop panels were imitation and another said the rackmount were real. Did current stright 8 owners do margin checks and if so what margins are reasonable to shoot for? The manual doesn't seem to clearly say. The last is the DF32 with the straight 8 has modified W103 device selectors. It seems that they were modified from pulse amp outputs to DC coupled level outputs. Has anyone seen this done before? http://www.pdp8online.com/dfds32/pics/w103-mod.shtml?small (next picture is schematic). I'm still working on getting the drive running so haven't seen if they work ok.

12 years, 1 month

HELP...please help to save something of this..

by holm＠freibergnet.de

Hopefully for someone in Europe interesting. There is a storage Hall with some old computer content in Dortmund/Germany. Please look here: http://www.robotrontechnik.de/html/forum/thwb/showtopic.php?threadid=8155 and here: http://www.robotrontechnik.de/system/foto.php?dir=Computersammlung Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741

12 years, 1 month

Complete "Amateur Computer Society" Newsletter Available Online

by lbickley＠bickleywest.com

The Amateur Computer Society (ACS) was founded by Stephen B. Gray in May, 1966. The ACS was for those who "are building or operating a homemade computer from their home". An interesting requirement was that the computer had to at least perform "automatic multiplication and division". In practice, membership was open to anyone who had a "serious" digital computer operating from their home. In my case that included a RPC-4000 ;-) Since I had been a member of the ACS, I had searched everywhere online for the complete set of ACS Newsletters - and found only isolated copies of individual newsletters. I did find that Stephen Gray had donated his original complete set to the Babbage Institute. Subsequently, I did a detailed search of the Computer History Museum's (CHM) archives via their Collections Department. I was excited to find that the CHM also had a complete set of the ACS Newsletter. I requested that they scan and make a PDF copy (including OCR) of same - and for a modest scanning fee they did so. It is now available to the world (free) via CHM's website: http://www.computerhistory.org/collections/accession/102654910 Go to the bottom of the page where there is a link to the PDF. For those who would like to know the earliest history of "home computers", I think you'll find it a fascinating read... Cheers, Lyle -- Lyle Bickley, AF6WS Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

12 years, 1 month

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test-drb March 2012