test-drb

test-drb@ccmp.vtda.org

101090 discussions

by pete＠dunnington.u-net.com

On May 30, 9:08, Jerome H. Fine wrote: >Jochen Kunz wrote: > > > On 2003.05.29 20:27 Jerome H. Fine wrote: > > > John, if you are reading this, it would be best if you could > > > confirm - also even better if you could explain why they > > > hardware to read the DEC RX02 8" floppy media is > > > not available on a PC. > > > > I am not John, but this may be the explanation: > > The RX02 uses double density only for the data inside the sector. The > > sector header is (mostly) the same as a RX01 sector header and it is > > rcorded in single density. > NOTE that most 3rd party RX01/RX02 controller/drive pairs > for DEC PDP-11 hardware were able to do the complete > LLF for RX01/RX02 media. In fact, I seem to remember that > the controller was not required - the drive contained the ability > to do a LLF off-line. This was not the RT-11 FORMAT > command, but a complete LLF. No, that's backwards. In the case of DEC RX01 or RX02 with a DEC controller, the controller card (in the QBus or Unibus) is fairly dumb, it's just an interface. The "smart" stuff is in the drive enclosure. The controller passes a FORMAT command to the drive, the drive chunters away and executs it, and reports back to the controller when it's done. In the case of third-party controllers with "industry standard" drives, the controller is "smart" and the drive is dumb. The controller does the formatting, and sends control signals and a data/clock bitstream to the drive, so you can't do anything > The same situation occurred with the DEC RX50 floppy media. > The DEC RX50 drive could NOT perform an LLF. It works differently than an RX01/RX02. In fact it works exactly like the third-party RX01/RX02 case above, except that DEC saw fit not to include formatting routines in the RQDX1/RQDX2 controller. The RX50 drive is an oddly-engineered variant of an industry-standard 5.25" dual floppy, with almost exactly the same control/data signals. > However, by the time that DEC allowed the RX33 on the RQDX3, > DEC had switched to industry standard HD PC 1.2 MByte floppy > drives and media with 2400 blocks. Yes, the RQDX3 includes firmware that can do the formatting. However the layout it creates is fixed, and not useful for an RX50 (which has almost exactly the same hardware interface as an RX33). > The question that is still unanswered is IF the board that dbit > has available that supports the RX01 floppy media on a PC > with the appropriate 8" floppy drive CAN ALSO support > an RX02 media? I seem to remember that the answer is NO! Correct. The answer is "no", for exactly the reason Jochen describes, and indeed John's webpage says so. -- Pete Peter Turnbull Network Manager University of York

22 years, 11 months

IBM System/36 - Advice Needed

by mross666＠hotmail.com

This should tell you most of what you need to know... I did my password hacking on a 5362, but there should be analagous tools on the 5364 PC console. http://groups.google.com/groups?selm=6m4rat85bf4hi45udaj05u5j6pm48e887g%404… Good luck! Mike http://www.corestore.org _________________________________________________________________ The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail

22 years, 11 months

Collection policy was Re: No space for vinatge computers in

by pete＠dunnington.u-net.com

On May 29, 17:12, Jerome H. Fine wrote: > With my grandchildren, I discovered a way to make binary > numbers interesting. We started with the concept that each > finger represented a ZERO or a power of two. > > All fingers down was ZERO. > > Baby Finger UP was ONE. > > Ruby Ring UP was TWO > > Both Baby Finger and Ruby Ring was THREE. Very good! I've seen a similar proposal written by Fred Pohl in a book called "Digits and Dastards". The last two items in this collection (of mostly SF short stories) are entitled "How To Count On Your Fingers" and "On Binary digits and Human Habits" (copyright 1856 and 1962 respectively!). -- Pete Peter Turnbull Network Manager University of York

22 years, 11 months

TRS80 mod 4 ver1 video/memory problems

by dwightk.elvey＠amd.com

Hi Jim There is a chance that the first crash also damaged the system info on your boot disk. Have you tried using another disk? You could also try putting the disk controller in but put tape over the select line( not sure what is involved here without a schematic ) and tie this line ( lines? ) so that the drive doesn't access. The idea is to see if something in the controller is loading the bus. If this is the case, BASIC won't boot. You could then isolate a pin at a time until you found the failure. Small pieces of tape work well for isolating edge connectors. That is about as far as I'm willing to make any guesses. Dwight >From: "Jim Davis" <jpdavis(a)gorge.net> > >Hi, >I recently picked up a model 4 ver 1 with a problem. The system originally >worked and booted, after moving the system it started to display random >characters >on power up and failed to boot.. I removed socketed ICs and cleaned >the connectors. >The system now displays a blank screen on power up ( although the drives >spin, and >it could be booting ). If I disconnect the FD controller from the main >board, the >system jumps into basic ( with video ) and seems to operate. Print >fre(0) returns >somthing over 48K with the fd disconnected. Any hints? >Jim Davis.

22 years, 11 months

Thinline Floppy Problem

by univac2＠earthlink.net

What does it mean when the light on a thinline floppy in a Tandy 6000 repeatedly blinks to the pattern: <long blink>...<blink><blink><blink> When I put a disk in, the drive makes healthy noises, but the light just keeps blinking like stated above, and the system seems unable to detect that there's a disk in the drive. -- Owen Robertson

22 years, 11 months

PDP11

by jhfinexgs2＠compsys.to

>Tony Manzo wrote: > Hello, If you have any PDP hardware/software that you wish to sell, > please email me. I have opened a "coffee house" - I hate the term > Cyber Cafe - that cateres to the technical and scientific, mainly > students and computer vets. We put the legacy systems online and > allow/encourage program development on the original equipment. I would > hate for such equipment to go unused, so if you can help, please let > me know. Thanks. Tony Manzo > Free online calendar with sync to Outlook(TM). Jerome Fine replies: I am attempting to track down just how Tony obtained my e-mail address plus if anyone else received the above e-mail. Also if anyone has heard of Tony and if he is legitimate? And does anyone know where Tony is located - which city? Tony Manzo <vgo_tony_m(a)yahoo.com> As far as I know, the only possible way Tony could have obtained my e-mail address was through cctalk(a)classiccmp.org since I first started to use it only a week ago. OR someone who is aware of my PDP-11 addiction gave it to him? In either case, I don't have an objection. But if there has been any hacking, then I would like to know about that aspect! In any case, if I am receiving spam via cctalk(a)classiccmp.org, then others need to be warned! If not, then I want to reply. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.

22 years, 11 months

8" drive hooked up to a PC

by dwightk.elvey＠amd.com

>From: Innfogra(a)aol.com > >Thanks for the tip on the D Bit FDADAP. I will probably get one as I think it >meets my criteria. I am not particular interested in reading DEC RX01 & 02s. >Those I will pass onto the list as I find them. > >My main interest is in CPM systems and disks of which I have several. Hi As was mentioned, not all controllers do single density. MFM double density is no problem. There are a number of programs out there that handle differing sector counts and sector sizes. You could also write your own. You'd need to know how to setup the DMA and the floppy registers. It isn't real hard but it is easiest if you have some examples. > >Also I wonder if it will work with intel development system disks. If your disk are single density and you have a controller that handles single density then you are OK. Intel's double density was M2FM and not MFM, for the 8 inch disk. About the only way to read this was with an Intel M2FM controller. As far as I know, these only existed on multibus boards. Dwight > >Thanks again for the leads. I will look at the CPM FAQ too. > >Paxton >Astoria, OR

22 years, 11 months

More Stuff for Auction at SYI

by marvin＠rain.org

I have listed some more stuff for auction over at http://www.sellyouritem.com. I have found quite a few DEC flip-chip and other boards that are being listed there in addition to other stuff of interest to listserver members. The area of main interest for list members is in the Classic Computer section at: http://www.sellyouritem.com/ListAuctions.html?CategoryID=1497 The things I am listing there are for 3 day auctions, and that should give everyone here a chance at them before they head over to (explatives deleted) Ebay. If you think the pricing is wrong, let me know as this was my best guess at reasonable pricing for list members. Again, the main idea behind putting them on SYI is to allow listmembers an equal chance at anything they might be interested in. I'm trying to list about 10 items/day there. Stuff that I will also be listing include a PDP-3L, Microvax, some DEC Disk Drive cartridges R????, and some other DEC cards that I have not identified yet. I *think* there are also several 11/34 cards that I have not listed yet, hopefully later today. ------------------------------------------- ebaY's Security Breach and Coverup http://www.auctionguild.com/generic110.html

22 years, 11 months

Collection policy was Re: No space for vinatge computers in

by pete＠dunnington.u-net.com

On May 25, 7:15, Hans B Pufal wrote: > No, but they can learn. I do EXACTLY that with a PDP-8/e cpu I drag > around to show at school exhibitions. The first question I get, of > course, is where is the screen and keyboard. I teach the kids binary, > than, with the aid of a small program left in the core we calculate the > mean of a sequence of numbers entered in binary. And not a screen or > keybaord in sight. This demo ALWAYS gets good reviews.... Exactly what I did with my 8-year-old niece at Christmas. She's really into "sums" and arithmetic at the moment, so when I wanted to play with my 8/E, I taught her a little about binary, showed her how to read octal off the switches and lights, and we added some numbers. She loved it. -- Pete Peter Turnbull Network Manager University of York

22 years, 11 months

8" drive hooked up to a PC

by Innfogra＠aol.com

> That way those of us with > an 8" hooked to a PC could make 8" disks. > How do you do this? I am interested. What floppy controller do you use? I am assuming it is for the ISA bus? Anything for a PCI bus. Anything for EISA, I am keeping one EISA bus system. Paxton Astoria, OR

22 years, 11 months

Kaypro 10 Question

by tombohon＠earthlink.net

Has anyone heard of a conversion of a Kaypro 10 to use a 3.5" floppy drive?

22 years, 11 months

8" drive hooked up to a PC

by Innfogra＠aol.com

Thanks for the tip on the D Bit FDADAP. I will probably get one as I think it meets my criteria. I am not particular interested in reading DEC RX01 & 02s. Those I will pass onto the list as I find them. My main interest is in CPM systems and disks of which I have several. Also I wonder if it will work with intel development system disks. Thanks again for the leads. I will look at the CPM FAQ too. Paxton Astoria, OR

22 years, 11 months

Computer-tourism in Manhattan

by norm-classiccmp＠docnorm.com

Hi, folks. I'm starting a vacation this Saturday with a few days in Manhattan. Are there good classic computing or telecommunications museums, or other interesting sites, there? I know IBM used to have a museum in Manhattan, but I never got to see it -- I'd hate to miss something else just before it closed. Any help is appreciated, and I'll gladly take pictures and/or send postcards for those who are interested :-) Norm

22 years, 11 months

Need a bit of help

by kurtk7＠visi.com

I really could use a bit of help. I have been trying to reach Martijn Kruger of Retro Computing Unlimited. I was corresponding with him and then haven't heard from him. Not sure if I said something wrong but he was helping me find some technical manuals. If anyone can reach him or knows how I should contact him, please let me know. Thanks Kurt

22 years, 11 months

DecServer 700 - WWENG2.SYS image

by alexandre.dulaunoy＠ael.be

Dear All, We have received a lot of old DecServer 700 but we are looking for the WWENG2.SYS image ;-) We have looked around the old digital ftp server, but there is only the pr0801eng.sys (not really useful). Where can we get the WWENG2.SYS image for the DecServer ? What is the software licensing for this image ? Is it linked to hardware or was it a separate product from Digital ? Thanks a lot. adulau -- -- Alexandre Dulaunoy (adulau) -- http://www.foo.be/ -- http://pgp.ael.be:11371/pks/lookup?op=get&search=0x44E6CBCD -- "Knowledge can create problems, it is not through ignorance -- that we can solve them" Isaac Asimov

22 years, 11 months

Interdata Model 74

by toby＠russellsharpe.co.uk

Hi, I recently picked up a PDP11/34 for restoration from a surplus dealer and spotted at the same time an Interdata Model 74 gathering dust. Needless to say, I managed to get this as part of the deal.. I'd like to try to restore this back to working condition, but my various searches for information on early Interdata models seems to have born little fruit. Does anyone have any information, documentation, engineering diagrams for this machine? Thanks, Toby

22 years, 11 months

AV11--Need advice.

by sherrill＠frontiercomputer.com

I ran across your 11/4/02 post about leaking capacitors. We have two (so far) PCs afflicted. What scares the crap out of me is that we have a number of them at customers as voicemail servers. You said you replaced with AV22 and AV18, and we'd like to find out if that'll work for us. I also read at overclockers how to replace capacitors. I believe both the PCs are 700 mhz Celeron running Windows XP. I'd appreciate any advice you can give us. Sherrill Lowrey sherrill(a)frontiercomputer.com

22 years, 11 months

XENIX Distribution Disks

by univac2＠earthlink.net

Well, I found someone with a Tandy 6000 keyboard to sell and it should be on it's way to me tomorrow. Unfortunately, when it gets here, I will have nothing to use it for, as I accidentally wiped XENIX completely off my 6000's internal hard disk while trying to format a secondary *external* hard disk. I will never again assume that a program named 'hdinit' will actually ask me *which* disk to erase, nor that it will ask for *ANY* kind of confirmation before wiping the internal hard disk... So I am now in the market for some Tandy XENIX distribution disks for version 3.whatever. I don't know the exact version number of the OS that was for the 6000 specifically. Also, should anyone have the Multiuser BASIC disks, or Profile for XENIX disks, those were lost as well... I didn't have any of the original disks for anything dealing with the 6000. I'd also like to get my hands on something my system never had, whose absence was very noticeable - the XENIX Development System, which contains things like the C compiler, mail, and many other things I don't consider optional in a UNIX-based system. Any help is greatly appreciated... -- Owen Robertson

22 years, 11 months

No space for vinatge computers in australia (fwd)

by vcf＠siconic.com

Ok you funny talking folks on the upside-down island, you have a job to do: Chips are down for computer museum http://www.theage.com.au/articles/2003/05/19/1053196515142.html The Australian Computer Museum Society is about to lose its space and needs 1,000 square meters to move its collection into. They have to find something within 6 weeks because they say it'll take six months to move their collection, and they must be out bu January 1, 2004. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 11 months

The Great Auction (Leaving the Hobby)

by cb＠mythtech.net

>How do you have a url if it isn't listed yet? I've >never heard of a delayed listing. When selling stuff on ebay, you have the option of setting your start date/time to something other than right now. It costs more to do this, but it is an option. So like Jeffrey's post said, the auction starts at 6pm PDT Wednesday. So I would assume the link will become valid as of that time (it would be nice if ebay gave you a slightly better message than just Invalid Item so you know you are looking at a not yet valid item as opposed to a totally incorrect listing ID) -chris <http://www.mythtech.net>

22 years, 11 months

DEC Modules F/A at SYI

by marvin＠rain.org

I've just listed some M series modules and a Quad Extender Board over at Sellyouritem.com. The URL for the classic computer stuff is at: http://www.sellyouritem.com/ListAuctions.html?CategoryID=1497 These are set for a three day auction to give listmembers a chance at them. I plan on listing about a dozen+ items a day, so it might be worthwhile to check over there occassionally. We've had some discussion about First Come/First Serve, and that basically means whoever lives at their computer has the best shot at anything offered to the list. I think this might be a fairer way of doing things without giving the whole world a chance at stuff. SYI has *NO* listing fees, and FVFs are slightly less than on Ebay. My feeling is that a three day auction gives everyone on the list a chance to look at the stuff, and bid if they are interested. ------------------------------------------- ebaY's Security Breach and Coverup http://www.auctionguild.com/generic110.html

22 years, 11 months

The Great Auction (Leaving the Hobby)

by jss＠subatomix.com

As promised, the bulk of my collection will be up for bidding in less than 24 hours. For an interesting twist, I have decided to sell my collection in one large lot instead of several medium-sized lots. This will hopefully maximize both convenience and entertainment. Remember, I'm also accepting items in lieu of cash. The auction kicks off today (Wednesday) at 6PM PDT (1AM GMT). I wish all contestants a safe, enjoyable bidding experience. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2732905006 -- Jeffrey Sharp

22 years, 11 months

HP 9845B <- free paper

by surjit.bilkhu＠btconnect.com

Hi there Do you still have any HP 9845B units left that you might want to get rid off. Rdgs Surjit

22 years, 11 months

IBM 8560

by cb＠mythtech.net

Any value to an IBM 8560? Or more correctly, is it something that someone on the list might be interested in. Its a full height tower 286 IBM ps/2 machine. There is at least one hard drive in it, and I think I have a 2nd for it (not sure the sizes, 20 or 40 MB I think). Last I knew it booted and worked fine. I've had it kicking around for some time, and its taking up space. I think it weighs about 40 lbs, so figure on 50 lbs packed for an estimate, shipped from 07450... anyone want it? -chris <http://www.mythtech.net>

22 years, 11 months

LA 120

by marks＠techprecision.com.au

Hi there I saw your post as a result of my search criteria in google, i am chasing any and all documentation on DEC LA 120 and any other relevant PDP material. I have just secured a position with a company that supports this type of hardware, and am having difficulty wrapping my mind around the sheer immensity of the equipment. So any help would be very much appreciated, as i search and search for any documentation. :) Best regards Mark Setter

22 years, 11 months

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