test-drb

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101090 discussions

by jonas＠otter.se

> Date: Thu, 25 Feb 2010 06:25:43 +0000 (GMT) > From: ard at p850ug1.demon.co.uk (Tony Duell) > Subject: Re: OT: white LEDs > To: cctalk at classiccmp.org > Message-ID: <m1NkXAQ-000J3xC at p850ug1> > Content-Type: text/plain > > > You can actually buy ringlights made in that manner, and they work > > pretty well. There are usually some cheap ones on a famous "auction" > > It is my experience that just about anything intended for photograp[hic > use is way overpriced :-=). OK, I can't grind lenses, so I am happy to > pay for good ones, but I am not going to pay high prices for things I > can > make in an afternoon or so. Quite apart from the fact that making the > device and experiemnting with it is more fun to me than taking > photographs... > LED ringlight: http://www.fotosidan.se/forum/showthread.php?s=&threadid=39550&highlight=Mak ro+blixt In Swedish, but I expect Google or ImTranslator or something will make a more or less intelligible mess of translating it. /Jonas

16 years, 2 months

Exxon Qyx Typewriter thingy

by BMcElroy＠dmai.com

My Dad worked on these (mechanical designer designing jigs and fixtures for assembly) at QYX in Lionville, PA in the late 70's There claim to fame was that you could type a letter and then have another one type the same thing over the phone lines as an original document....all pre facsimile machine. It is said that the technology was stolen to help create the fax machine. They did have a FBI Investigation for items stolen from trash bins. Brian McElroy Project Manager DAVID MILLER/ASSOCIATES, INC. 1076 Centerville Road, Lancaster, PA 17601 Phone (717) 898-3402 ext. 41 or Toll Free (877) 516-3740 Fax: (717) 898-9365 Visit our website at www.dmai.com<http://www.dmai.com/> CONFIDENTIAL MATERIAL: This message is intended only for the use of recipient to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If received in error, please notify the sender by return e-mail and destroy all copies of the original transmission and any attachments. Thank You.

16 years, 2 months

TRS-80 bootable media request

by jplist2008＠kiwigeek.com

Greetings; I have a friend with an TRS80 Model III would is looking for some bootable media w/TRSDOS and, possibly if available, CP/M. I'm not familiar with the TRS80 line, and I don't own any, so I'm not in a position to help. If anyone has such a machine and can create up some disks for a nominal charge I would be very appreciative, replies probably should be off-list. Many thanks. - JP

16 years, 2 months

Semi-OT: vintage videogames made into films

by evan＠snarc.net

http://videogames.yahoo.com/events/plugged-in/missile-command-movie-incomin… "Missile Command" may become a feature film.

16 years, 2 months

TRS-80 bootable media request

by alhartman＠yahoo.com

Isn't MultiDos either still being sold or available for free? When I was using my TRS-80 systems full time, it was my preferred OS. I lost my Newdos/80 Manual and discs, though I have copies. I'd be willing to help out with this request because I have all the major Model I & III os discs. But, my computer is an LNW-80 Model I and I'm not sure how well it would work to make bootable Model III discs. I used to know, but that was 20 years ago. I just moved, and as soon as my new computer room is setup, a project is to test and image all my old discs from all my various systems. If anyone in the Mid Jersey shore area has a working Model III or IV they are willing to give away, trade or sell (at a price a disabled guy can afford), I would be glad to use it to help in this instance. It makes me sorry I sold my 4p on eBay a few years ago. Al

16 years, 2 months

TRS-80 bootable media request

by klake＠chartermi.net

Just about anything TRS-80 related can be had or learned via these sites! I hope this helps. I've still got a half-dz Mod 4/4D's, about that many Mod III's, a couple Mod 4P's, and a few Mod I's (not to mention Mod II's, Mod 12's, Mod 16's, and probably at least one of each variation of the 26-variations of the Tandy 1000, a Tandy 1200, and a Tandy 3000). http://cn80.blogspot.com/ http://www.tim-mann.org/misosys.html http://manmrk.net/tutorials/TRS80/trs80links.html I used to be very active in the community, but with business demanding more and more of my attention, I fell away from it so much so that I wasn't even aware (though unsurprised) that Stan Slater had passed last August, and with him his CN80 News and his CN80 store on ebay. RIP Stan! >Greetings; > >I have a friend with an TRS80 Model III would is looking for some bootable >media w/TRSDOS and, possibly if available, CP/M. I'm not familiar with the >TRS80 line, and I don't own any, so I'm not in a position to help. > >If anyone has such a machine and can create up some disks for a nominal >charge I would be very appreciative, replies probably should be off-list. > >Many thanks. > > - JP Kim J. Lake

16 years, 2 months

Y2K retrospective / was Re: Algol vs ...

by arcbe2001＠yahoo.com

I get back to my point that a lot of the comments and criticisms concerning the absence of the century in system design comes? from people ill equipped? and knowledgeable to be able to pass judgment.? By 1985 I had been working in Data Processing for 20 years!? Hardware constraints dictated what we did and didn't do.? The hardware constraints were our main obstacle and? were twofold: 1) Cost - Memory was incredibly expensive (Read The mythical man month) 2) Hardware Technology - Early systems were mag tape only.? The bottom line to this is that there is always a price point.? Added to which, and factored in, is the life expectancy of any system.? Back then it was considered around 10-15 years plus.? A lot of systems had no upward compatability and applications needed to be modified to run. In the mid 60's only large companies had systems with greater than 16K memory and disc drives.? Mag tape 800 and 1600 bpi if you were lucky was the norm.? Systems running a single job stream were common place. ?? Now the more sophisticated systems - of which the British ICT (ICL) was one - used an offset to hold dates.? The ICL 1900 range? used a technique of holding the number of days since the Jan 1st 1900.? Richard Pick later used a similar off-set technique in his Pick O/S (Dec 31, 1967).? We used assembler language because we had to.? Generally they were considered a necessary evil although I loved using it. 3rd generation language compilers weren't that mature and generated a lot of machine code instructions making them a memory hog and slow to execute. ?? While the main pack (IBM lead) pursued architecture that used Assembler, Burroughs took a different, and far better approach as their systems used Algol. In the early days when we wrote programs they were written onto coding forms.? Once punched onto 80 column cards we would check each card to ensure that had been key punched correctly.? Checking an 8000 statement? program took time.? Once checked we would have it listed (used little machine time).? We would then dry run through the program looking for logic errors.? Having done that we would have it compiled.? Typically there would be a couple of development slots or so a week for testing so we had ensure that we had done due diligence.? If it compiled we would schedule a test slot and run against test data.? Debugging consisted of analyzing dumps and correcting the code.? Contrast this against interactive source debuggers.? Today machine time is inexpensive and many compiles and test shots may be performed in a day.? "Workbench" tools allow the programmer to run their program without even hitting the mainframe.? A totally different world.? There was no padding of EDP (Electronic Data Processing) budgets - they didn't exist, there was not an EDP cost center in the G/L.? EDP was a huge investment for any company.? We didn't have an EDP Manager in the true sense of the term as we reported to the head of finance - The chief accountant.? It was later that we split off and became a separate entity with our own budget. --- On Wed, 2/10/10, Brent Hilpert <hilpert at cs.ubc.ca> wrote: From: Brent Hilpert <hilpert at cs.ubc.ca> Subject: Y2K retrospective / was Re: Algol vs ... To: General at invalid.domain, "On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Date: Wednesday, February 10, 2010, 1:25 AM William Donzelli wrote: > > > 11 years ago, I pointed this very fact out to "journalists" who were > > convinced that Y2K was all a scam to pad IT budgets because "nobody > > would have gone to that much trouble to save 4 bits (00-99 fits in 7 > > bits, 2000 fits in 11 bits) even in the 1950s. > > While it was not a scam, it certainly was used to pad IT budgets. I would argue the public aspect of the issue was a scam. The people who needed to know, knew already. The public hype around the issue was overblown and unnecessary. Remember the various experts and consultants railing about how microwave ovens and cars and anything with a microprocessor in it (things that didn't even know about the date) were going to fail? I still have the bulletin from the government mailed out to every household in Canada to prepare everyone for Y2K: a fine example of public folly.

16 years, 2 months

Barden programming books (was: Re: TRS-80 bootable media request)

by mtapley＠swri.edu

At 17:20 -0600 2/25/10, Mike L. wrote: >"More TRS-80 Assembly Language Programming", by Bill Barden A comment and a question: I found on eBay the CoCo Assembly book by the same author. It's clear, an enjoyable read, and does a good job of introducing programming, the debugger/assembler implemented on the cartridge, and 6809 assembly language in a simple, easy-to-understand progression. However, it seems to me to give really short shrift to what the 6809 designers considered to be very important features of the processor. Position independent code is barely touched on, there are a lot of what looks to me like kludgy programming techniques, the most advanced software-management tool discussed is a flowchart (and then there's no useful example of how to use them), the multiple pointer registers are abused as 16-bit counters rather than as indexing pointers, and there are many similar examples. Does anybody else have the same take on this? I was thinking about using it to teach programming to one or more of the kids, but it seems to me that I'd rather find something a bit more structure-oriented, and less likely to use "tricks". Am I just spoiled from having read the 6809 programmer's guide and the (somewhat snooty-sounding) Byte article on 6809 design and introduction? -- - 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.

16 years, 2 months

Windows 1.0, Windows 2.0, Windows 3.0

by legalize＠xmission.com

Does anyone have these releases of Windows prior to Windows 3.1? -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

16 years, 2 months

toner cartridge vendor

by brianlanning＠gmail.com

It looks like the toner cartridge is the source of the problems with my HP 4100. Somewhere between the $20 charged on ebay for crappy chinese cartridges and the extortionate prices charged for new ones by HP is a sane price/performance area. Can someone suggest a good vendor that charges good prices for toner cartridges that aren't junk? Thanks. brian

16 years, 2 months

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