test-drb January 2002

test-drb@ccmp.vtda.org

303 participants
1201 discussions

by mcguire＠neurotica.com

On January 14, R. P. Bell wrote: > I've heard the following, to add to that list: > > Pentium/Pentium II -- PowerPC > Pentium III -- PowerPC G3 > Pentium IV -- PowerPC G4 This is SO far away from accurate I'm not even going to comment on it. > I'd bet a buck there's a LOT of disagreement on the list. Unfortunately, > there's just no adequate way to compare the full range of recent and current > mprocessors by looking for strict equivalencies. It would be interesting to > see a chart covering the relative relationships of processors in PeeCees, > Macs, and Minis (including Sun, SGI, RS/6000, etc.). I agree...They have wildly varying relative strengths and weaknesses...a meaningful general comparison is all but impossible. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

24 years

68010 (was Re: Mac IIci)

by mcguire＠neurotica.com

On January 14, William Fulmor wrote: > > > Yes, as I remember, it was required for one or both of the mods. > > > I still keep my eyes open for cards with 2010s when I'm at > > > hamfests. > > > > What sort of cards used them? Any PeeCee HD controllers that I > > wouldn't mind tearing apart? > > They're in AT era boards. I have several WD1003-WA2 boards which I have > not yet cut up, but I know I've pulled them from other boards including > one IBM branded board where the WD2010 was socketed. Cool, thanks...I will keep my eyes open for some. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

24 years

68010 (was Re: Mac IIci)

by mcguire＠neurotica.com

On January 14, blstuart(a)bellsouth.net wrote: > Yes, as I remember, it was required for one or both of the mods. > I still keep my eyes open for cards with 2010s when I'm at > hamfests. What sort of cards used them? Any PeeCee HD controllers that I wouldn't mind tearing apart? -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

24 years

68010 (was Re: Mac IIci)

by mcguire＠neurotica.com

On January 14, blstuart(a)bellsouth.net wrote: > There was a 2nd drive mod whose design was circulated and there > was also a mod that allowed for bigger drives by supporting a larger > number of cylinders. Ahh, yes! I remember that now. Didn't it involve replacing the WD1010 with a WD2010 to get the higher cylinder number support, or something along those lines? Dammit, now you guys have me wanting another 3B1 or 7300. *GRRR!) :-) -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

24 years

DECvoice boards for trade

by rdd＠rddavis.org

Greetings, Since I have no access to a T1 telephone line, and hence am unable to use the DECvoice board set in my VAX 4000, consisting of one each of M3135-01, M3135-02 and M3136 boards, I was wondering if anyone's interested in a trade. The bulkhead panel, and cabling to these boards that came with my VAX, will be included. The DECvoice software appears to reside on my system we well. It appears that resellers are asking quite a bit (over US$1,000) for one of these boards. If anyone's interested in making an offer for the set, or individual boards, of cash or trade, then I'm willing to consider offers for trade. Some of the things I'm interested in and may consider towards a trade: - additional memory - large DSSI disks with sleds and front panels - SCSI board - a tape drive and mounting sled/brackets, etc. (preferably DLT) - hub with both BNC and and 10-Base-T connectors Other suggestions are welcome. :-) -- Copyright (C) 2001 R. D. Davis The difference between humans & other animals: All Rights Reserved an unnatural belief that we're above Nature & rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such http://www.rddavis.org beliefs and to justify much human cruelty.

24 years

68010 (was Re: Mac IIci)

by csmith＠amdocs.com

> -----Original Message----- > From: Ethan Dicks [mailto:erd_6502@yahoo.com] > I know that some model of UNIX PC had room for a full-height MFM drive > under a hump (most only had room for a half-height). It was > too little, > too late, but you could drop a lot more than 40Mb inside - maybe 80Mb > or more! :-) IIRC, that was the second UnixPC model that was never released. (7400?) It was also supposed to have a color screen. That said, I suppose it wouldn't be difficult to run the drive interface cable through a plate in the back of the machine, if you can find a plate that will fit it, and has a hole for a connector that you can run to an external drive chassis. In fact, I haven't opened the machine in ages, but you could possibly even run the external disk as a second drive, given some other slight modifications. I don't recall whether the UnixPC had any data cable header for a second drive. Probably not, since it wouldn't have fit inside. On the other hand, there are MFM to SCSI bridges, I believe, and I wonder whether you could just use one of those and run some 1GB or so disk on it. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years

OT: DELL SUCKS! Re: PC Gamer, best 50 classic games issue?

by DAW＠yalepress3.unipress.yale.edu

! >We have a local computer shop that (last week) had as-is 3c589 NICs ! >for $5, but no dongle. I bought a couple spares, and a ! >Xircom PS-CEM-28 ! >(also no dongles). Hopefully the 10BaseT dongle I have for another ! >Xircom card will work (the 100BaseT dongles _are_ different). ! ! I saw some generic dongles down at the CompUSA a little while ! back. They ! were $25. The blister pack said it worked with 3com and other PCMCIA ! cards. I used it successfully with a XIRCOM 10bt/56k modem card (only ! with the Ethernet half... modem used a different connection, but that ! looked similar to the one that fit in my old ActionTec modem, I just ! never got around to trying it). ! ! The dongle also said it worked with 10/100 ethernet. There are no ! markings on the dongle of value (it is here in front of me) ! so I can't ! tell you the brand, but I do know for sure I bought it at CompUSA ! ! -chris ! ! <http://www.mythtech.net> ! Well, I have the Xircom 10/100 & 56k modem combo card, that has the actual jacks buit into it. No dongles to worry about :-P Granted, it does take up two PCMCIA slots, but I don't have anything else to use in there now anyway... --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818

24 years

Mac IIci

by fernande＠internet1.net

Hello, The Local GoodWill has a fairly nice Mac IIci. I've done some research on the Low End Mac web site, but am still undecided if I should buy it. Low End Mac says it is a "Mac Best Buy", meaning that it is one of the models to buy, instead of avoid. Some models are best avoided because of compromises in design or limited expandability. It is uses a 25mhz Motorola 68030 processor. What would be the approximate Intel/PC equivalent? The 386DX-25? The 486DX-25? faster, slower, what? I don't have much Mac experience at all. I own a Plus, but after cleaning it, I haven't done anything with it but let it sit, mainly because of the silly 800K drives. It has a Radius video card, but unfortunately, the Radius monitor got sold separately. It was a "Pivot" monitor. I pulled the monitor of the nonfunctioning IIcx and the ci boots fine, and is running System 7.1. How much should I offer? Thanks, Chad Fernandez Michigan, USA

24 years

Prophylactic replacement of electrolytic capacitors?

by kapteynr＠cboe.com

I have not yet tried this yet -- In theory, electrolytics can be re-formed. There is a very thin aluminum oxide layer that disappears after a long time. Running current through the cap will rebuild the insulating layer until current will no longer go through it. I want to reform the original capacitors in my Altair "in place" -- i.e., without unsoldering them. I have the following setup in mind: 1. Insulate the computer from the world -- unplug it and put it on a rubber table. 2. Use ultra mini test clips to connect to both leads of a capacitor. 3. Connect the test leads to one of those lab power supplies that have adjustable DC voltage and a milli-ammeter. 4. Connect + on the lab power supply to + on the capacitor (very important). 5. Start at zero voltage and increase slowly while looking at the ammeter. 6. Stop increasing the voltage when the ammeter reads anything more than a few milliamps. (If it draws too much current, the capacitor will heat up and may blow up) 7. Wait for the current on the ammeter to drop to zero. 8. Continue to increase the voltage, and wait for the ammeter to drop until you reach the rated voltage limit of the capacitor. 9. Repeat for every electrolytic cap in the computer. Has anyone done this ? Will it work ? Comments? -Rob

24 years

8" Disk drives

by pat＠purdueriots.com

On Mon, 14 Jan 2002, Tony Duell wrote: > > > > One quick question, are those normal or inverted signals? The PC floppy > > Active-low (inverted, -ve logic, whatever you call it) > > > adaptor seems to have all negative logic (inverted) signals. If they're > > really negative logic, it'll be possible to rewire a cable pretty easily, > > otherwise I'll need to put some inverting buffers on it. > > No, it's just a cable. The only issues are : > > 1) The data rate is 500kbps (same as a HD PC drive) in DD mode, so you > can't use an XT controller (not that you'd want to...) > > 2) The Low Current signal. This is a reduce-write-current input that > should be asserted (pulled low) when writing to tracks >43. Most PC > controllers can't supply that signal directly. If you're just wanting to > read disks, then it's not important, though. > > 3) Many PC controllers have problems with single-density operation... > OK, A couple more issues I wanted to ask about: 1) Should I use "Read Data Composite" or "Read Data Separated"? What's the difference? 2) Do I need to do anything with the "Clock Separated"? I'm guessing that's an output that goes with the Read Data Composite/Separated outputs 3) Can I just connect the 'head load' to 'ready' or is 'ready' dependant upon the heads being loaded? Thanks a TON for the info! -- Pat > -tony >

24 years

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test-drb January 2002