test-drb June 2009

test-drb@ccmp.vtda.org

233 participants
404 discussions

Atari 800xl Super Video 2.1 mod (and other video mods)

by redodd＠comcast.net

Subject: Re: Atari 800xl Super Video 2.1 mod (and other video mods) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <725511F2-87D0-46E5-B99E-7C8EEDA9458C at xlisper.com> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes On Jun 9, 2009, at 10:21 PM, David Betz wrote: > I recently acquired an Atari 800xl and would like to apply the Super > Video 2.1 mod to get better video but have been unable to locate the > description of how to do it anywhere on the web. I've done a google > search and found many links to it but they all led to dead ends. Can > someone point me to the article describing this mod? >Okay, I finally managed to find the Super Video 2.1 instructions but >now find that they seem to be in addition to the Super Video 2.0 mods >rather than a newer version of them. I also find that some people >recommend against making them but instead suggest some simpler mods to >improve the 800xl video. Has anyone here had any experience with >trying to improve the video output of the 800xl? What do you >recommend? I'd like to at least enable the S-video output. David, I've done the Super Video 2.0 & 2.1 mods about 5 times now and it always works perfectly. My brother has a 52" Samsung LCD and the picture is unbelievable! The S-video output is perfect. We had an Atari party and everyone wanted to know why the picture was so flawless. I have no experience with the other mods, but I highly recommend the 2.0 & 2.1 mods. Here's a link. http://www.wolfpup.net/atarimods/supervid.html Good luck and have fun. Ralph

15 years, 7 months

DEC computer hardware for sale

by william.berkeley＠yahoo.com.sg

for a list of dec, sun and other legacy computer hardware, pls visit: http://decsurplus.wordpress.com/ New Email names for you! Get the Email name you've always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/sg/

15 years, 7 months

Remembering the true* first portable computer The Register

by zmerch-cctalk＠30below.com

Rumor has it that William Donzelli may have mentioned these words: > > DYSEAC was running in 1954. It was mounted in an Army truck. Not quite a > > Osborne, but it was the first time a modern, digital computer was > > specifically designed for mobility. > >Do not be surprised if the crypto guys had something before that. But >they ain't talking... Prolly due to security clearances... Despite the fact that dollars to doughnuts it could prolly be hacked in about 12 seconds flat nowadays, there's still things I can be jailed for life (or worse... but I doubt it would come to that ;-) under the charge of treason if I disclosed in public, AFAIK. In class where I learned about these items I'm not telling you about, we weren't allowed to take any form of physical notes - things had to be committed to memory (mammalian only, not electronic. ;-). Last time I checked (with military personnel with correct security clearance) it was still classified, but that was at least a decade ago. Not to worry - of what I speak is on topic - it was my first taste of papertape after all... and that's all I'll say. ;-) Now back to drinking Tequila & looking for the black helicopters on the horizon... "Merch" -- Roger "Merch" Merchberger -- SysAdmin, Iceberg Computers _??_ zmerch at 30below.com (?||?) If at first you don't succeed, nuclear warhead _)(_ disarmament should *not* be your first career choice.

15 years, 7 months

Atari 800xl Super Video 2.1 mod

by dbetz＠xlisper.com

I recently acquired an Atari 800xl and would like to apply the Super Video 2.1 mod to get better video but have been unable to locate the description of how to do it anywhere on the web. I've done a google search and found many links to it but they all led to dead ends. Can someone point me to the article describing this mod? Thanks, David Betz

15 years, 7 months

(Resending) Re: Further 11/40 unibus questions...

by derschjo＠mail.msu.edu

Resending this, as it seems to have not made it to the list for whatever reason. (Sorry if this ends up in people's mailboxes twice...) Tony Duell wrote: >>> Then I'd look at all the Unibus signals both with the terminator out >>> (they will still be terminated by the resistors at at the CPU end -- >>> IIRC on an 11/40 these are on the Unibus jumper between the CPU and >>> first expansion backplane) and with it fitted. I would guess >>> something is changing state, let's find out what. >>> >> I will start looking at this tonight (assuming I have the time >> tonight :)). Thanks. >> > > OK, let us know how you get on :-) > > -tony > Ok, finally stopped being distracted by other shiny objects for long enough to do some more fiddling with the 11/40. And of course, instead of hooking up the logic analyzer, I decided to play around with the Console SLU/LTC board. Because I evidently don't follow suggestions well. But this has a good ending, sort of. Maybe. So the SLU was unresponsive no matter what I did. Tried it at 9600 baud, no go. Dialed it down to 300, no dice. Checked the continuity of the dip switches, of which there are approximately 500. No problems there. Checked, and double-checked the wiring on the serial cable I built. No go. Stole the cable from my 8/e... still no good. So I moved it out of the 9th slot on the processor backplane and into the first slot on Unibus backplane. (And put a grant card in the 9th slot...) And hey, it works. Toggled in a short "echo" program and what I type on the terminal keyboard is echoed back, at a blistering 300 baud. So... clearly there's something wrong with the SPC slot on the processor backplane. A couple more questions: 1) Is the NPG grant on the unibus slot on the processor backplane (slot 9) supposed to be connected to the NPG grants on the Unibus expansion? That is -- right now if I set my DMM to continuity mode and put one probe on CA1 on the first slot of the unibus expansion, and the other on CB1 on the last slot of the unibus expansion, since all NPG grant jumpers are in place, the DMM shows the circuit as closed. This is as I'd expect. However, if I move the probe from CA1 on the first slot of the expansion to CA1 on slot 9 of the processor backplane, the circuit is then open. I'm guessing this is not correct. (There is currently an NPG jumper installed on slot 9.) 2) Where is the +15V to the processor backplane supposed to be connected? (I suspect this may be the reason the SLU won't function in slot 9...). Right now it's plugged into pin CV1 on slot 9 (if I'm reading the Unibus pin chart right :)) but the docs I have found say this should be ACLO_L... Thanks as always... Josh

15 years, 7 months

IRC channel?

by segin2005＠gmail.com

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Do we have an IRC channel? I'd really like to know. The mailing list seems like a clumsy medium at times. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkou4vEACgkQF9H43UytGiZd2ACgv0bdGz7m1riZqHd4pNgJPHWX pCsAnR8C+DoKfHFoZWiTSqxeGEJDQmva =Ye1R -----END PGP SIGNATURE-----

15 years, 7 months

Bricklin's new book

by evan＠snarc.net

I plan to read this soon: "Bricklin on Technology" -- http://www.bricklin.com/bontech/

15 years, 7 months

Help with identifying digital transistor circuit cards.

by ragooman＠comcast.net

I was at the recent hamfest here in Pittsburgh and was lucky enough to pickup for free some old digital transistor circuit cards. There wasn't any identifying logos are names on any of them. I'm hoping someone here might have a clue as to what system these are from. Below are links to the photos of each circuit card. http://tinyurl.com/kuuxoq http://tinyurl.com/m94cpq http://tinyurl.com/nj6mza http://tinyurl.com/ld6gy9 http://tinyurl.com/me53ly thanks, =Dan -- [ = http://www2.applegate.org/~ragooman/ ]

15 years, 7 months

Transistor Substitution

by ohh＠panix.com

Okay: I admit it, I am sometimes pig-ignorant about basic hardware questions. :/ I have a couple of DEC machines which I need to replace a few components on, and also stock up spares of others. With the transistors and diodes, however, I often can't find a direct replacement - and don't know how to figure out what a modern substitute is. For a 2N3009, for example, I can find basic information and a datasheet online easily enough - but as for choosing a functional, available substitute for it, I'm honestly not even sure where to begin. Is there a basic resource for determining modern equivalents for older transistors and diodes? Can someone helpfully provide me with a clue here? :) Thanks! -O.-

15 years, 7 months

Stuff in Portland, Oregon

by healyzh＠aracnet.com

Is anyone interested in stuff located in the vicinity of Portland, Oregon? I'm not sure what all it would included. It might even depend on the persons interests. The stuff needs to be out of storage by this weekend, a lot has already been moved into the garage of our new house, and the rest will hopefully be moved between now and Sunday. Some free, some not so free. I'm looking to downsize and tighten the focus my collection since realistically I don't mess with the stuff much any more. Some items such as spares for my PDP-11's I'm not really interested in getting rid of. Though for the right price I could be talked out of most things. My focus has shifted primarily to DEC PDP-11, VAX, and Alpha as well as C-64. Though I'm hoping to get an Apple ][ of some sort up and running as well as a couple others now that I have the space. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

15 years, 7 months

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test-drb June 2009