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101090 discussions

newbie building a scratch-built computer

by dkelvey＠hotmail.com

>From: woodelf <bfranchuk at jetnet.ab.ca> >Gordon JC Pearce wrote: > >>There's also Megasquirt, where you can buy the hardware platform as a >>kit, and download the circuit diagrams and firmware source code. > >Umm time to change the subject line ... Fuel injection has very little >with a scratch built computer. >PS. Looking at a PROM burner the lowest cost one I could find is $750. >Where they that expensive (the programmers) back in the 70's when people >used them? > Hi Professional ones were. There were a number of them that were simple data latches and voltage supplies. These were usually less than $100 but you had to supply the computer to actually run them. Dwight _________________________________________________________________ Learn.Laugh.Share. Reallivemoms is right place! http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us

18 years, 10 months

PCI questions

by compoobah＠valleyimplants.com

Probably pretty basic PCI questions, but it seems to be difficult to find detailed information about PCI online (for less than big $$). I have a 98% useless 53C875-based SCSI card (Diamond Fireport 40), useless because the Diamond PCI ID is different from the Symbios PCI ID. I have several machines that support 53C875 chips natively (Alpha, Sun, perhaps HP 9k), so I'm trying to figure out how to turn this thing >from a piece of junk that I trip over into an asset. Looking at the card, there is a small Atmel EEPROM (not the firmware). (a) does anyone know if there's a way to bittwiddle without pulling the EEPROM? (2) since the machines I will be using it in have onboard firmware support, what would happen if I just pulled the chip (or is the setup of onboard peripherals integrated into the system firmware and the card initialization will fail without the EEPROM)?

18 years, 10 months

Can someone tell me what this means?

by technobug＠comcast.net

On Aat, 11 Aug 2007 09:13:06 -0700, Chuck Guzis" <cclist at sydex.com> wrote: > > What does Apple and Steve Jobs have to do with Unix? > > Cheers, > Chuck See: <http://weblog.infoworld.com/enterprisemac/archives/2007/07/ leopard_gets_un.html> <http://www.opengroup.org/openbrand/certificates/1190p.pdf> CRC

18 years, 10 months

non-subscribers, slackers, and scoundrels in general was Re: UK VCF?

by aek＠bitsavers.org

> Loads of people even on this list are sitting on > stacks of old floppies, and don't even take the time > to ensure the data therein won't be consigned to > oblivion. Lurkers far outnumber active participants on mailing lists. The CHM Software Preservation Group mailing list has over 100 subscribers. I doubt if there have been posts from more than a dozen people there. I think there are four people who have created content for the group web site http://www.softwarepreservation.org/

18 years, 10 months

Commodore 64 power jack?

by dgriffi＠cs.csubak.edu

Can someone recommend a source for the 7-pin PCB-mount DIN jacks used for the power jack on a Commodore 64? -- 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?

18 years, 10 months

Vintage Cisco Router code

by aek＠bitsavers.org

>> I've got myself a Cisco AGS+ router (1986-1995) and I'm looking for OLD >> code versions for it. I got it running Cisco GS/IOS 9.x, but want to >> see some early revisions. I believe this particular model can go up to >> IOS11.x, but that isn't my goal. I'd like to have examples of "what was." > >The oldest I have are EPROMS with 8.2. They are also IGS, but I think >they can work with the AGS. It has been so long I just do not remember >- the GSs were going out of service when I was getting involved. I >know people that were involved - maybe I can ask. > >I ought to just send all the chips (I have quite a few) to Al, if he >is interested. Al? we're interested. another curator here at CHM supported AGS

18 years, 10 months

AT&T 3B2

by compoobah＠valleyimplants.com

Picked up a 3B2-1000 from Josh about a month ago, and I'm still poking around prior to trying to mess with it (hardware looks fine, PSU good, tape roller is jelly but that's fixed by now, hard drive died, but that's being handled). Does anyone here know much about these beasts? I have the service manual from Manx, but it doesn't say much about the architecture. Here's my big question now: I have a 3B2-1000/80 backplane (CM519B) with a 3B2-1000/70 system board (CM518B) (in a 3B2-1000/60 box, to round things out...) 3B2-1000/60 has a single ?Bus slot and several buffered ?Bus slots. 3B2-1000/80 has Pbus slots and fewer buffered ?Bus slots (Pbus takes "Processor Element" multiprocessing cards). 1000/70 might or might not have a ?Bus slot (in the 1000/60 the ?Bus takes a cache card, the cache is integrated in the /70 and /80 system boards). The service manual explains the ?Bus and the Pbus both with the blanket term of "unbuffered access to the CPU bus on the system board". Does anyone know what the difference is? At this point, I'm trying to find out what the lower slot configuration is.

18 years, 10 months

UK VCF?

by doug＠stillhq.com

Just a thought.. Here in Australia, we have formal protection that is available to Trade Marks, through applying at the Trade Mark Office, and paying an associated fee. I have no idea whether the American equivalent exists, but I am dead certain that unless you have a formal Trade Mark number, you have *no* protection from somebody using your brand name. Does the same thing exist in the UK? I am also certain that there is no concept of a globally protected Trade Mark system. You have to apply for protection in every country. It was very interesting to see "Burger King" here operate as "Hungry Jacks", because somebody already had the name... Doug

18 years, 10 months

IBM PC Portable

by wh.sudbrink＠verizon.net

Got the following email today (not my area of interest). I could possibly pick up and store for a VERY SHORT time. ======================================================================== Would you - or anyone else you can recommend - be interested in an IBM PC Portable I wish to donate? If someone will pay the shipping costs, I'd gladly donate it. It's from 1984. I used it when I was in college and as far as I know it still works. Thanks! Justine Nichols Silver Spring, MD fergiestorm at comcast.net ======================================================================== No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.11.11/944 - Release Date: 8/9/2007 2:44 PM

18 years, 10 months

UK VCF?

by RodSmallwood＠mail.ediconsulting.co.uk

What about a VVCF = Virtual Vintage Computer Festival? Via a Website to webcams at list members locations. If around they can show off their collection to one or more visitors. Lectures no problem. Demo's Yup. No need to drag equipment around the country. Precious/heavy kit does not get damaged. Fully International Zero cost. The only downside is the loss of the social aspect. Rod Smallwood (The DecCollector) -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Tim Walls Sent: 06 August 2007 15:04 To: cctalk at classiccmp.org Subject: Re: UK VCF? Pete Turnbull said: > On 05/08/2007 21:10, Tony Duell wrote: >>> Hire a genny. >> >> How stable is the frequency of such a unit? Remember many larger disk >> drives have their spindle speed set by mains freqeucy. > > To say nothing of the fact that the output is often nothing like a > sine wave, and many devices don't take kindly to that. Thanks to Yorkshire Electricity Distribution Ltd. being bloody useless, I am considerably more intimate with my building's generator than I was a few short weeks ago, so this is a subject close to my heart! Anyway, the long and the short is that gennys certainly can produce reliable power - more reliable than YEDL, anyway. Our unit is an Iveco 6l 4-stroke diseasel driving a MarelliMotori genset, generating 150Kva of 440v 3phase. Output voltage and frequency are programmable, and frequency stability calibration is documented in the manual. Modern gennies would be more than capable of doing the job, and should be readily available for short-term lease. You'd be surprised how quiet and clean-running they are as well. Fuel isn't cheap though; IIRC running it at ~75% load it uses something in the order of 200 litres/day of diesel; it should be OK to use red diesel in a genny I think (for non-UKers - red diesel is diesel on which fuel tax hasn't been paid,) but you're still looking at a fair old cost. Oh, and to answer the original question - I'm up noorf in Yorkshire, although I'd actually prefer such an event to be in London. I'd be interested in going if it does happen, anyway. Cheers, Tim. PS. Word of advice - check the fuel controller pump relay. Nothing more annoying than being woken up at 3am because a poxy 5 quid relay has stuck and caused the header tank to run dry. Voice of bitter experience there ;-). (On the bright side, if that does happen I can now show you how to hand-prime a dry diesel engine :^).) -- Tim Walls at home in Leeds EMail & MSN: tim.walls at snowgoons.com

18 years, 10 months

UK VCF or equivalent

by sellam＠vintagetech.com

See, this is one part of the reasons why I don't actively follow the list: Patrick Finnegan said: > > Indeed. I view Sellam's attitude as a response to all of the people > > who recently were saying, in effect, "Screw your copyright, I'm using > > your name anyway!" > > It'd be nice if Sellam could at least figure out how to say this in a > non-"I'm going to ruin your life for doing something that's not nice" > sort of way. And this is from a friend even!! :/ First of all, how would I be ruining someone's life by running an event parallel to someone trying to steal my international brand name? I'm not threatening to burn down their house and kill their pets, for fuck's sake. I'm not even threatening to sue! I'm offering a rather democratic way to resolve the issue: go to the fake "VCF" or the real VCF, and see which one you prefer. I'm willing to bet that most people would choose the real VCF, and the fake "VCF" would suffer. The question is, does anyone really want to take the gamble? It would be easier to just come up with your own damn name. As others previously have pointed out, this is a brand identity I have developed over the course of 10 long years. I'm not going to let anyone use it unless I approve. I'd be an idiot to allow otherwise. If someone produced a cola and started selling it as "Pepsi", would you have sympathies with Pepsi or the person egregiously stealing the brand name? Anti-capitalist lefties aside, I have a pretty good idea that the legal system would side with Pepsi (the real one). Would you go to MacWorld run by Apple, or "MacWorld" run by a guy named Abdullah? And would you criticize Apple for suing the hell out of Abdullah for infringing on their trademark? Pat, you know the deal. You produce the VCF Midwest under an ad hoc license. Why should I let someone else just take it and run with it as they wish? I certainly wouldn't give you that type of leeway. Nor anyone else for that matter. Are UK nerds just anti-ownership in general, or only because I'm the one raising a beef over the prospect of someone stealing my brand identity? Unreal. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

18 years, 10 months

newbie building a scratch-built computer

by classiccmp＠memory-alpha.org.uk

Hi, >> Please note that I've got a couple of programmers as >>well as an eraser--and a big pile of EPROMs. I use them. >>But I don't find it particularly convenient. > > Fair enough. :-) I've been dealing with them for a long time >(as you have) and it's just second nature to me; I don't really >notice the inconvenience. It's what you're used to. I spent some 6 years using EPROMs for development and never considered it an inconvenience (tine consuming, but necessary). Then I used an EPROM emulator.... TTFN - Pete.

18 years, 10 months

newbie building a scratch-built computer

by classiccmp＠memory-alpha.org.uk

Hi, >>....and it won't work in anything newer than an XT. :-( > > Why is that a disdvantage _on this list_? Surely original >IBM PC/XT machines are not hard to find (are they?) and >they're certainly repairable... I've got a couple buried somewhere here (an XT and at least one XT-286). The "disadvantage" to me is that I simply don't want to keep an old DOS machine like that going purely to burn the odd EPROM/PAL. Plus, I want to be able to burn EPROMs directly from this machine, the one I do my development work (such that it is at the moment) on, not mess about transferring the files to another machine....hency the reason I really should overhaul my "S3". But I do take your point. :-) TTFN - Pete.

18 years, 10 months

Fun with TK50's

by ian_primus＠yahoo.com

Well, in my adventures with this MicroVax II and it's associated TK50, I have learned a few things about these critters: TK50 Facts: A TK50 drive has phillips head screw-heads on both reels (underneath, through hole in board for supply/cartridge reel, and in the center of the take up reel on the top). This allows you to manually rewind a tape that's jammed in the drive. When you rewind a tape that's been stuck in the drive for who-knows-how-many years, it won't necessarily load the next time. Some portions of the tape were wrapped unevenly and dragging inside the cartridge (you can feel it, pusing in on the reel from beneath the cartridge). It's possible to manually wind the entire tape out of the cartridge in order to fix this, using only a phillips head screwdriver. And provided you cleaned the drive, it'll even rewind when power it back up. Said cartridge won't actually hold data again, however. (Can anyone say shoeshine?) Tape cartridge design hasn't changed much. DLT III tapes look almost identical, and would fit if it wasn't for a plastic tab on the left of the tape. Tape cartridges are so identical, in fact, that you can disassemble your dud TK50, and move the bottom part of the shell over to a DLT III cartridge, allowing you to insert it into a TK50 drive. As clever as this seems, it doesn't work at all. Not that I really expected it to, TK50's are 350 orsted, DLT III's are like 1540 orsted. The media is very, very different. I just wanted to see what would happen. In case you're curious, such a tape will thead up, load, then give an error. The tape won't properly rewind and unload either, you have to do it manually. You't think that the designers would have thought of this, and implemented some system of preventing you >from inserting a DLT III tape into a TK50 drive. Like a plastic tab or something. Oh, wait... A TK50 cartridge makes a rather thick, but serviceable, coaster. Just in case anyone else wanted to know :) -Ian

18 years, 10 months

Need a copy of Memorite for a Vector 4

by cclist＠sydex.com

Anyone got one? The executable file is fine, or even a diskette image containing it. I'm not sure which version of Memowrite the Vector 4 used, so I'm sorry I can't be more specific. Thanks, Chuck

18 years, 10 months

Commodore PET 2001 Photo, 1-18-77

by billdeg＠degnanco.com

Doing a little research.. What date was the Winter Consumer Electronics Show in 1977? Are there any published photos from this event? I have a photo of the prototype Commodore PET 2001 from the Jan 18-20 1977 Gametronics convention proceedings. http://vintagecomputer.net/commodore/gametronics-77/Gametronics_1977_PET-20… ...Is that Chuck Peddle in the photo? ...Is this the oldest known photo of a PET? More photos: http://vintagecomputer.net/commodore/gametronics-77/ I am trying to determine whether Gametronics came before or after the Winter CES in Jan 1977. The web does not seem to have the answer, maybe someone on this list was actually there... Bill D

18 years, 10 months

UK VCF?

by roger.holmes＠microspot.co.uk

First a simple question, how many readers of this list are in the UK? If Bletchley Park might be able to do a VCF in two or three years time, maybe we could do something much simpler in the mean time, without using the VCF name. Just a get together of anyone in the UK with an interest in old computers and hopefully a few who would want to exhibit theirs. Who would be interested and about how much space, if any would they want? I guess we would need to double that up to allow for aisles etc. Then we'll know the size of venues to look for. By the way, I was really thrown by the mention of the planet Venus, it took me a while to work out it was a typo for venues :-) Then there's the question of vehicle parking. How many and are we talking only cars and small vans or big vans and articulated lorries? Roger, who is planning a 1300 sq ft extension to his computer room, and who lives on a farm in Kent. Probably too small and not central enough, but who knows.

18 years, 10 months

[personal] cctalk Digest, Vol 48, Issue 20, Message 16

by mike＠brickfieldspark.org

> Message: 16 > Date: Thu, 9 Aug 2007 07:45:42 -0700 > From: "Rick Bensene" <rickb at bensene.com> > Subject: RE: Looking for manual for IME 86s desktop calculator > To: "General Discussion: On-Topic and Off-Topic Posts" I've just had a calculator that looks very similar to the IME 86 shipped over from Europe. It was made by Tesla Bratislava located in Bratislava, Slovakia, formely in Czechoslovakia. Apparently they copied other designs for their products, from the layout it is obviousley 3 register based and has core memory storage. I am in the process of reconditioning the unit to get it working, keyboard was completley seized (fixed that), transcribing the layout back to a circuit, cleaning it up, power supply is missing though. If anybody knows of any info of this or the IMS machine or similar machines please let me know. Can post photos of the unit. Many thanks. Mike Hatch Web - www.brickfieldspark.org E-mail - mike at brickfieldspark.org Urban Wildlife ring - www.brickfieldspark.org/uwringhome.htm >> My dad's had an IME 86s calculator in his office for years, >> He's interested in finding a copy of the manual for it -- > A wonderful machine, with a great design. The Italians managed to > package a lot of machine into a relatively small footprint for the time. > Very nice mechanical design and electronic elegance. > > There's a lot of history relating to the IME calculators, particularly > the IME 84 (IME's first electronic calculator) and future calculator > industry developments. > > I haven't come across a manual for one of these machines yet, and have > been looking for a long time. > > I know well how these machines operate. If you have any questions on > how to operate it, drop me an off-list Email. > > > Rick Bensene > r-i-c-k-b-at-b-e-n-s-e-n-e.c-o-m (delete dashes, and replace "at" with > the obvious character) > The Old Calculator Museum > http://oldcalculatormuseum.com > >

18 years, 10 months

Commodore 64 power jack?

by adamg＠pobox.com

Ensor wrote: [regarding mini-DIN connectors] > I hate those connectors with a passion, they're so small that they're almost > impossible to solder up. And half the time you spend so long trying to > solder to the pins that you end up melting the buggers....gah! :-( IIRC, if the connector you're working on is plugged into a mating socket while you're soldering it, it tends to retain its shape better. -- Adam

18 years, 10 months

newbie building a scratch-built computer

by ajp166＠bellatlantic.net

> >Subject: Re: newbie building a scratch-built computer > From: Dave McGuire <mcguire at neurotica.com> > Date: Sun, 05 Aug 2007 14:43:16 -0400 > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > >On Aug 5, 2007, at 12:17 PM, Chuck Guzis wrote: >> For that matter, why bother with UV erasers and UV EPROMs at all? > > Sorry to jump in, but I'd like to add my opinion. I have a few >reasons why someone might use UV EPROMs. > > If you've got the right equipment, UV EPROMs are cheap, readily >available, highly standardized, predictable, and generally pretty >bulletproof. Works for me. The larger Eproms like 27128, 27256 and larger I have loads of from old PCs that were junked. A ready supply of fast and large (often CMOS) eproms make it easier to do that. Though I had to mod my Prommer to do parts larger than 27256 the code upgrade was easy. Allison > > -Dave > >-- >Dave McGuire >Port Charlotte, FL >Farewell Ophelia, 9/22/1991 - 7/25/2007 > >

18 years, 10 months

Ebay user bobar

by silent700＠gmail.com

Are you on this list?

18 years, 10 months

Mountain View - was UK VCF or equivalent

by marvin＠west.net

> Marvin Johnston writes: > Since I have a great deal of stuff to sell, I plan on bringing as much as I > can with me :). It will be *wonderful* when I get the workbenches cleared off > -------------------- > > I thought you were making progress with the TRW and Livermore swap meets. > That's a couple of loads a month! Not enough progress!!! Most of the stuff I brought down last month was being sold for other people. I'm getting ready to list a bunch of (appropriate) stuff on VCM as well. The Zaca fire was close enough (about 10 - 15 miles) that I wasn't comfortable going to Livermore last week. This weekend, I'm putting on an ARDF practice here so I won't be going to DeAnza. > Won't have much to sell. What is the VCF policy anyway? Can you do some > dealing during the show? Or is it strictly show with the dealing outside or > offline some where? If you can sell, what is the cost for a booth or table? > > Billy The costs and policies will be posted on the VCF site once Sellam starts publicizing VCF. AFAIK, it is no problem to make deals on or off the show floor :). I'm also trying to get Dana Trout (Pickles & Trout) to come up. If he will do that, it is possible that Sellam would put him on the list of speakers; he has some fascinating stories to tell!

18 years, 10 months

SORD

by cc＠corti-net.de

I have a SORD M243 Mark V system that came with PIPS, BASIC and SGL. This Z80 system from 1982 seems to be interesting as it has a built-in color monitor and graphics capabilities. But whenever I load SGL (Sord Graphics Language) into memory I can't load anything other afterwards (like BASIC), I get "memory exhausted". The system has "only" 192 kB RAM and is expandable to up to over 700 kB. I wouldn't mind building a memory expansion but I don't have the description of the hardware, especially of the pseudo-S100 bus of this machine. Does anyone have a hardware manual or the description of the I/O bus? I'm also looking for other software like Fortran, MDOS distribution disks or even CP/M (not sure if there was a CP/M for the M243). Christian

18 years, 10 months

newbie building a scratch-built computer

by ajp166＠bellatlantic.net

> >Subject: Re: newbie building a scratch-built computer > From: "Chuck Guzis" <cclist at sydex.com> > Date: Thu, 09 Aug 2007 09:37:12 -0700 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >On 5 Aug 2007 at 17:21, Allison wrote: > >> Works for me. The larger Eproms like 27128, 27256 and larger >> I have loads of from old PCs that were junked. A ready supply >> of fast and large (often CMOS) eproms make it easier to do that. >> Though I had to mod my Prommer to do parts larger than 27256 >> the code upgrade was easy. > >....but the OP had neither eraser nor programmer for the things--and >that was my point. Why bother using slow, obsolete parts when there >are better alternatives available? Two reasons, cost and availability. Allison > >Cheers, >Chuck >

18 years, 10 months

UK VCF or equivalent

by marvin＠west.net

> > *IF* you put on an event of your own and choose to call it the "Vintage > > Computer Festival", *THEN* I will bury your event. Do what you like, but > > find your own name. > > This is why I wouldn't call it VCF or have anything to do with the US > VCFs in any case. The mere fact that someone has enough ego to go "It's > *MY* name and if you use it I'll *crush* you, muahahahaha" puts me off > any further involvement. I don't know how many people feel as I do, but I would not attend a VCF that Sellam was not a part of. He has put a great deal of time and money into promoting this event, and for someone to feel they can dogtail onto his work without his permission is just something I would not support. And the feeling that the wheel needs to be reinvented when Sellam has made it very clear he would support anyone wanting to put on a VCF, is beyond my understanding. And that said, how many people will be attending this years VCF at the Computer History Museum in Mountain View? I have very much enjoyed being able to put faces with names, and it is a great social event as well as being educational! Since I have a great deal of stuff to sell, I plan on bringing as much as I can with me :). It will be *wonderful* when I get the workbenches cleared off and I have enough time and room to work with this stuff again.

18 years, 10 months

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