test-drb May 2012

test-drb@ccmp.vtda.org

189 participants
220 discussions

by elson＠pico-systems.com

cctalk-request at classiccmp.org wrote: > Message: 1 > Date: Thu, 24 May 2012 11:20:55 +0200 (CEST) > From: Christian Corti <cc at informatik.uni-stuttgart.de> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: Re: Software for OCR'ing paper tape? > Message-ID: <alpine.DEB.2.02.1205241119530.20068 at linuxserv.home> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > On Wed, 23 May 2012, Jonas Otter wrote: > >> Am I completely wrong if I think I remember that the sprocket holes have a >> fixed relationship to the data holes? If so, it ought to be possible to build >> an optical decoder, illuminate it with a simple light bulb, connect it to an >> input-capable parallel port on a computer with suitable software, and simply >> pull the tape through by hand? The sprocket holes would function as a clock >> for the data. >> > > Now guess how a classic photoreader (optical paper tape reader) works... > This was done YEARS ago, in the very earliest microcomputer days. Jon

11 years, 11 months

Need 4-pin PSU to front motherboard connector for Sun V210

by microcode＠zoho.com

A kind-hearted list member sent me a PSU and some RAM for my V210. I finally got around to installing stuff today and I found out one of the connectors on the new PSU I received has shattered and splintered and can't be used. Apparently from heat or age or both it became so brittle it started disintegrating and the pins must have gotten damaged along the way. The connector I am talking about is the 4 pin square connector that goes through the bulkhead to the front system board and terminates behind the system configuration card. The PSU I was going to replace failed today after I put it back in when the new one couldn't be used. Although the BIOS is showing every possible PSU error the system seems to run ok, as before. Sun sure made good stuff! Their servers even run fine with a failed PSU... As I was doing all this I spilled a nice full cup of coffee (that I had deliberately moved out of the way, or so I thought) all over a Filco while moving stuff around so I could work on this machine. At least now I get to test the "wash the keyboard in the shower" theory. So far it's dead but maybe it will start working again when it dries out. If not that was an expensive cup of coffee. At least the RAM I installed works. Anyway, is it possible to get a hold of these connectors along with the crimp-on pins? They look fairly standard, I just don't know who sells stuff like that. I don't know if I can post attachments to the list but I have pics if anybody can help. I'm also looking to buy additional PSUs and RAM for V440 and V210s. Somebody had said they had some RAM to give me but it's been a long time and nothing heard. If you have anything to sell please email me with your prices. Thank you.

11 years, 11 months

Also a Quantum 2020 was Re: M7555 For How Much???

by innfoclassics＠gmail.com

> Anyone seen: > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190684935842 Surplus dealer in Cleveland with unrealistic expectations. Since he deals in medical and process control equipment he probably sells enough big stuff so he doesn't have to worry about the small stuff. At least he takes offers so he is negotiable. Most of the listings are a set (buy it now) price or best offer postings. And it is a new Ebay requirement that you offer a minimum of 14 days if you take returns. This is reflected in their recent postings. Of probably more interest to the list is this offering, a Quantum 2020 8" hard drive from him. I would recommend making an offer rather thatn taking the buy it now, but he is offering free shipping and the Quantums are heavy. http://www.ebay.com/itm/Quantum-Q2020-20MB-Disk-Drive-SA1000-Interface-/251… I didn't check their feedback on packing and would recommend doing this if you are interested. Also some of these drives have a parking lever and some autopark. It is wise to check and see if it is parked. Paxton -- Paxton Hoag Astoria, OR USA

11 years, 11 months

One for Sinclair aficionadi, if you're quick: dozens of Speccys, Interface 1s, Microdrives, even a Rotronics Wafadrive

by lproven＠gmail.com

http://www.ebay.co.uk/itm/380442411168 Anyone want to buy this and split it with me? :?D -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884

11 years, 11 months

cctalk Digest, Vol 105, Issue 66

by elson＠pico-systems.com

Date: Tue, 29 May 2012 12:22:23 +0200 (CEST) From: Christian Corti <cc at informatik.uni-stuttgart.de> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/05 Control (M7261) won't deposit Message-ID: <alpine.DEB.2.02.1205291219530.8955 at linuxserv.home> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed On Sun, 27 May 2012, Jon Elson wrote: >> >> Working on a PDP-11/05. The front panel appears to work, I can step through >> [...] > > is likely the write command is not getting to the memory. There are a > > bunch of ways to make a front panel work, but since this is a raw logic > > machine (no microcode) they probably worked hard to minimize the logic > Stop, the 11/10 and 11/05 are fully microcoded machines. So much that even the minimalistic switch front panel is handled in the CPU microcode. I've learned that when I repaired our 11/10. Oh, yeah! NOW I remember what an 11/05 is, the really short (3U?) machine with the single-line front panel. YES, for some reason I was thinking of the 11/20 or whatever the first model was. You are certainly right about it being microcoded including the front panel control. I did work on an 11/05 about 1980 or so. We moved up to a used 11/45 and then got a VAX 780. Jon

11 years, 11 months

Paper Tape

by BobB＠LivingComputerMuseum.org

We are in need of folded paper tape and cannot find a source? Our plan is to purchase rolls and fold them ourselves. Anyone have any suggestions how best to fold rolled paper tape. Bob Barnett Vulcan Inc. Living Computer Museum 503-522-4848

11 years, 11 months

FFS: MSDOS 2.10 users manual and more

by dgriffi＠cs.csubak.edu

I have a slipcased users manual for MSDOS 2.10 and a copy of the Motorola CMOS / NMOS Special Functions Data tech book. They're free for shipping from the 93306 zipcode in Bakersfield, California. -- 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?

11 years, 11 months

Fwd: CP/M web browser

by aek＠bitsavers.org

This just made my day.. -------- Original Message -------- Subject: CP/M web browser Date: Sun, 27 May 2012 13:21:52 +1000 From: Zhu Feng <zhufeng at notmail.com> Organization: Aioe.org NNTP Server Newsgroups: comp.os.cpm Does any 1 know where to download a CP/M web browser that support Javascript?

11 years, 11 months

PDP-11/05 Control (M7261) won't deposit

by ian_primus＠yahoo.com

Working on a PDP-11/05. The front panel appears to work, I can step through and examine addresses in memory, and I can run the CPU and halt it. Deposit, however, does NOT work. When the deposit switch is flipped, the LED's show the correct value, but examining the address again shows no change to memory. I know that this board is the problem, having swapped in a module from a working computer. I can, with the good board, toggle a test program into core. Then, shut it off, switch in the bad board, and the program (still in core) runs, and I can examine all areas of memory and see it correctly. I've only begun to glance at the schematics for the control board, but I would assume there is some kind of write buffer that's not working correctly. I'm going to continue to try to figure this out, but without a card extender, it's very difficult to troubleshoot. Anyone have any ideas on where to start? Failing that, does anyone have an extra M7261 available? :) -Ian

11 years, 11 months

Commodore Datasette belt?

by wheagy＠gmail.com

Hi, Does anyone know of a source for the rubber belt in a Commodore datasette (from a PET 2001)? I've considered buying another datasette to get the belt, but chances are the belt will be as poor as the one I have. Thanks...Win

11 years, 11 months

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test-drb May 2012