test-drb October 2001

test-drb@ccmp.vtda.org

259 participants
770 discussions

by paul＠orchard.wccnet.org

M H Stein: I asked about possible 6502 and 68000 items you mentioned on this list, but I never heard a reply from you. Is the AIM65 stuff still available? Paul R. Santa-Maria Monroe, Michigan USA

24 years

SCSI problems

by ghldbrd＠ccp.com

A friend has a 9 gig Seagate drive and an Adaptec 1542C card and is having a helluva time getting it to work with a late model motherboard. boots okay from an IDE drive, but the aforementioned setup hangs almost every time. Do you know of an incompatibility with the drive and card; i.e. too much drive for the scsi bios to understand??? Gary Hildebrand

24 years

ArcNet and the Pursuit of Multiple Topologies

by pete＠dunnington.u-net.com

On Oct 16, 9:33, Douglas Quebbeman wrote: > > Now I'm thinking that the "T" in "10BaseT", "100BaseT4", etc. and the T in > > the line capacities "T-1", "T-2", etc. are the same thing. > > Is that true? > > I thought the 'T' in 'T1' stood for "trunk", as in trunk line... That seems very likely, given that it was invented by AT&T in the late 50's/early 60's. I'm fairly sure that's what they used the technology for originally. -- Pete Peter Turnbull Network Manager University of York

24 years

Fwd: [GreenKeys] Need help in the Denver area

by jfoust＠threedee.com

Eric Smith <eric-no-spam-for-me(a)brouhaha.com> is in trouble in the Denver area, if anyone can help... - John >Date: Fri, 12 Oct 2001 14:16:28 -0700 >To: greenkeys(a)qth.net >From: Don Robert House <drhouse(a)nadcomm.com> >Subject: [GreenKeys] Need help in the Denver area >Sender: owner-greenkeys(a)qth.net >Reply-To: Don Robert House <drhouse(a)nadcomm.com> > >Eric Smith is driving coast to coast to deliver some rare computer and teletype equipment. The U-Haul truck broke both rear springs. He needs to off load the truck in the Denver area and make arrangements to come back later with a different truck. Is there anyone out there that can help us out? >Eric's cell phone is: (408) 838 3733 > >Thanks for any leads, > >Don >-------------------------------------------------------- >Don Robert House, N.S.E. >Curator, NADCOMM >North American Data Communications Museum >3841 Reche Road >Fallbrook, CA 92028-3810 >760-723-9943 Office >760-723-9984 FAX >URL: http://www.nadcomm.org >e-mail: drhouse(a)nadcomm.org > > >---- >Submissions: greenkeys(a)qth.net

24 years

Dark Tower - any internals info out there?

by mythtech＠Mac.com

>Does anyone know if there is any info to be had about how the innards >of games like Dark Tower function. I've never seen inside one but I >presume there's a custom chip that's a microprocessor, RAM and ROM >all rolled into one, for cost reasons. I think I still have mine, and in working condition. Although I would not be willing to part with it (thus why I think I still have it), I CAN open it and send some digital pics of the chips. Maybe even draw out some schematics. I would guess that based on its age, there is nothing fancy in there. Probably a simple eeprom or something for storing your stats, and everything else was probably random gates (fighting, spinning, whathaveyou). As far as "emulation" goes, I would think you could just write it from the ground up following the rules of the game. Although, it wouldn't be a true emulation, it would make it playable (and you could do it networked EASY... now THAT would be a cool internet based game!) -chris <http://www.mythtech.net>

24 years

ArcNet and the Pursuit of Multiple Topologies

by pete＠dunnington.u-net.com

On Oct 12, 13:46, Eric J. Korpela wrote: > Just wired the house with Cat-5 this week. 10bT has the advantage that it's > also 100bT with a change of equipment. (ISTR that you can use the > unused pair in the cable for LocalTalk, but I haven't yet tried it). That's true, you can run all sorts of things over Cat5 "structured wiring", in fact that's the point of structured wiring. 10baseT uses two pairs (pins 1+2, 3+6), the phone uses the centre pair (pins 4+5). ISDN uses all four pairs. Serial lines use either the middle pairs (for Tx/Rx) or all four (DTR/DSR, Tx, Rx, RTS/CTS) if they follow the DEC (and other) system. Some use the same pairs as Ethernet (which means a crossover cable for Ethernet also works as a null-modem for Tx/Rx on serial lines). 100baseTX uses the same pairs as 10baseT. You're not supposed to run a phone line (pins 4+5) on the same cable as an Ethernet (pins 1+2, 3+6); it breaks the spec. However, you'll normally get away with it with 10baseT, and it *may* work for 100baseTX over short distances. It certainly won't work for 100baseT4 (does anybody still have any of that?) or 1000baseTX (Gigabit) because they use all four pairs. Nevertheless, you can buy little boxes which are essentially a Y-piece for phone+10baseT -- you need one at each end of the cable. They consist of a small box with two RJ45 sockets and a short Cat 5 lead ending in an RJ45 plug. You can also get similar boxes to combine/separate two 10baseT signals (they move the second signal from pins 1+2 and 3+6 onto 4+5 and 7+8) and ones to simply double up the sockets (pin 1 to pin 1 to pin 1; ... ; pin 8 to pin 8 to pin 8) which are sometimes used for ISDN. For some reason they tend to be different prices, and all overpriced (over here they cost ?8 - ?15, though you can make one for about ?3 including the cost of the box to put the PCB in). I'd be wary of running Localtalk over a cable carying a phone or Ethernet signal. Again, it might work, but it will probably generate interference which might be hard to track down -- I write from experience[1]. Better to use one cable for one service at a time. The real reason for using different pairs for different services is partly serendipity, and partly to avoid damage if you plug the wrong device into a cable which is already connected to something incompatible at the other end. In my workshop and study I have quite a lot of Cat5 (actually Cat5e, the Cat5 standard is officially obsolete) which I use for 10baseT, 100baseTX, serial lines, ISDN, a phone line, and even the audio to the speakers. I'm about to add a couple of Econet adapters, and I'll probably use it for some LocalTalk (PhoneTalk) when I get round to sorting out the non-Ethernet Macs. [1] More than one bad experience, but exemplified by the occasion when I had to make a trip to Northern Ireland with a couple of technical staff >from Acorn to visit some schools who had networking problems. The school staff insisted everything was done to the standard, but it turned out that their erratic network problems were due to putting LocalTalk down the existing network cables. It had worked for a while, but when they extended the networks, both suffered. -- Pete Peter Turnbull Network Manager University of York

24 years

Dark Tower Pics

by mythtech＠Mac.com

A few pics of the controller to Dark Tower have been posted. You can find them at <http://www.mythtech.net/darktower>. (Pic #28 is missing, it is the same as 29, just out of focus). The board is about 7" x 3" (17.5cm x 7.5cm) There isn't a whole lot on it. 3 lights down the middle that are socketed, an LED digit display, a pair of LEDs (IR send and recieve, it is used with the picture disc to determine what pictures are facing out), there are a handful of resistors, a few Capacitors, 3 transitors (9112 D 07; 9113 D 05; NP2 3704) a choke coil, 2 diodes, and 3 ICs. The 3 ICs are all Texas Instuments, photos of them are on the web site (I made sure you could read the numbers, but they are upside down right now) The two connector looking things on the very end of the board opposite the LED digit display... are in fact connectors. The white one tied to the motor, speaker, and batteries, and the black one tied to the push button panel for user interaction (the push buttons are a flat 3 x 4 pressure panel connected to the board by a ribbon cable.) That is about it. I will try to draw up some basic schematics later (I'm a little busy at work right now, hopefully I will get to it later this week, or maybe next week). I don't know if I will be able to do any testing of my unit. When I opened it I found batteries had been left it in, and leaked. There is some pretty bad corrosion of the largest IC where the battery acid dripped on it. I am hoping it will still work when I clean it and put it all back together, but there is a chance it has been damaged. Also, the LED digits have suffered some damage (the laminate cover is peeling back >from corrosion) I will post again when I have the schematics done. -chris <http://www.mythtech.net>

24 years

Collections vs. accumulations, was Re: How many collectors?

by DAW＠yalepress3.unipress.yale.edu

For me, There is only one criteria for collecting - does it pique my interest in some way? If it does, I'll add it to my classic computer collection, and proceed to use it, for something... :-) --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818 ! -----Original Message----- ! From: Hans Franke [mailto:Hans.Franke@mch20.sbs.de] ! Sent: Tuesday, October 16, 2001 3:10 PM ! To: classiccmp(a)classiccmp.org ! Subject: Re: Collections vs. accumulations, was Re: How many ! collectors? ! ! ! > >Vintage computer collecting is really no different from ! many other forms of ! > >collecting, its simply less common. ! ! > >Vintage car buffs clearly are more advanced in their ! restoration and repair ! ! > >Firearms collecting (in the USA) is probably the most ! similar form of ! ! > >In all these forms of collecting, as well as stamps, ! coins, and any antiques, ! ! > Two basic types of collector, those who assemble sets of ! items of value, ! > whose value is enhanced by completeness of the set, and ! those who collect ! > examples of fine craftsmanship and items of special merit ! compared to there ! > contemporaries. Most of my favorite systems I would be collecting ! > regardless if they are rare or common. Things I hunt down ! mostly because ! > they are rare, often prove much less satisfying to own than ! to look for. ! ! Well, I still go for a variation of Murphey's law, which I found ! to fit at least my experiance: ! ! As soon as you aquired someting you belive to be truly rate and ! unique, A second incarnation will popup close thereafter. ! ! And as a bylaw it's stated: ! ! The price asked for the second item is as lower as more you did ! spend on the first. ! ! I got again the proof right after I returned last week: ! ! This summer I found a original tool box for a BF 109 figher ! (basicly a big wooden chest), and I payed a premium to haul ! it home ... now a good friend of mine, which I was teasing ! with my find literaly stumbeled across exact the same chest ! in an old basement - and got it for free! ! ! Well. ! ! Gruss ! H. ! ! -- ! VCF Europa 3.0 am 27./28. April 2002 in Muenchen ! http://www.vcfe.org/ !

24 years

New aquisitions: PCjr (minus power supply) and Amstrad PC 6400

by mythtech＠Mac.com

>To make this perfectly clear, I need the external 110VAC to 16.7VAC >part, not the internal AC->DC part. well, it has been a while since I looked at one, but if I understand you, you want the big black external brick that goes between house current and a small round power plug on the PCjr... right? That is what I think I have one or two of still kicking around. The one I was picturing in my mind (and why I was thinking of an odd right angle plug), was a power brick to an old HP Deskwriter... I realized that about an hour ago, when I kicked the HP brick that was sitting on my floor. Now, the problem is, I might have been thinking of the HP brick when I was thinking I might have a PCjr power brick... but I will still look, just to make sure. (If I have a PCjr one, I know where it would be, it is just a matter of getting to it) -chris <http://www.mythtech.net>

24 years

SCSI problems

by dhquebbeman＠theestopinalgroup.com

> Not to mention that you can't get a refund, you pay $5 or $6 to get in > whether you buy or not, and you may never see the same vendore ever again. > Most "new" stuff are factory seconds/refurbs and they don't tell you that > the warranty doesn't apply (saw one guy pulling the "refurb" stickers off > boxes at one iI went to in Louisville last year) Not all of the vendors are > crooks but there sure is a high percentage. Well, I bought a membership and expensed it out to $CURRENT_EMPLOYER, and they pay for the parking too... but generally you'd be right. There is one motherboard seller selling refurbs, clearly marked, and ditto as maybe or maybe not functional. But a few things do carry a warranty, and I see the same faces and company names almost every time (especially the non-hardware guys like Hacker Hut). At least 50% of the vendors are local and have storefront operations. Russ, are you in Fort Knox? I see you mention the area from time to time, we should get together sometime for a pizza at Impellizeri's... -dq

24 years

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test-drb October 2001