- test-drb@ccmp.vtda.org - classiccmp.org

by roblwill＠usaor.net

Probably all that's wrong with it is a blown fuse. (that happened to a TRS-80 Model I P/S that I had). To get it open, take a utility knife (the kind with snap-off blades) with a new blade, and a blow torch. Use the blow torch to heat the knife, then "cut" around the P/S until the top half pops off the bottom half. I use this method to open old laptop batteries to replace the cells. When you get the P/S fixed, just put the two halves back together, (sand [or cut] the ridges off made by the hot knife, first) and put a bead of hot glue in the seam to hold it together. It doesn't look that bad, and It can always be popped apart with a screwdriver if you need to fix it again. GooD LucK, ---------- > From: Sam Ismail <dastar(a)ncal.verio.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: Apple //c power supply > Date: Friday, October 09, 1998 4:10 AM > > On Thu, 8 Oct 1998, Paul Kearns wrote: > > I'd like to get in there and see if I can fix it, or just rebuild it (but > I'd still like to at least rebuild it inside the brick case). Does anyone > know if there is a way to get these things open without ruining them? I've > pushed and poked and prodded with no luck.

27 years, 9 months

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Regarding PDP-11/ and rt11 too

by CLASSICCMP＠trailing-edge.com

>>The question is however is there something else? I know fuzzball is >>around but I don't know if that is a option for most -11 users. >I don't think so, since some of Fuzzball, if I remember correctly, >is built under RT-11 and runs under RT-11. I don't think I've seen >a Fuzzball system which was entirely self-bootable. (Maybe John >Wilson can answer, since he's done some stuff with it). John Wilson does have self-bootable Fuzzball images on ftp.dbit.com, in /pub/pdp11/fuzzball. Fuzzball is an "operating system" of sorts, but you can't do development with it unless you have the RT-11 macro assembler, linker, and other program development tools, so there isn't a lot of interesting stuff you can do with it unless you've also got a RT-11 license. TSX+ is pretty much the same way - without the RT-11 utilities you're dead in the water. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 9 months

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IBM 5363 II

by rigdonj＠intellistar.net

OK what is an IBM 5363 II? I found one in a trift store. I've been told that the 5363 was a S/36 that designed to be a very low cost entry into the 3X architecture and that it runs an operating systems called SSP. So what is a 5363 II and what OS does it use? Is it worth picking up and saving? Also does anyone know how to get around the password protection? Joe

27 years, 9 months

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Regarding PDP-11/ and rt11 too

by mbg＠world.std.com

>The question is however is there something else? I know fuzzball is >around but I don't know if that is a option for most -11 users. I don't think so, since some of Fuzzball, if I remember correctly, is built under RT-11 and runs under RT-11. I don't think I've seen a Fuzzball system which was entirely self-bootable. (Maybe John Wilson can answer, since he's done some stuff with it). Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 9 months

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Apple //c power supply

by paulk＠microsoft.com

Arrrggghhh... Okay, so, for some time my Apple ][ collection has included a //c which I've never booted because I didn't have the brick for it. I've seen them for sale all over, but always for $25 to $40 (plus shipping). Since that's like five times what I paid for the CPU, I've been pretty reluctant to go for it. At the VCF swap meet, I picked up a //c with brick for $15, and the vendor even threw in a non-working //c for parts (cool). I brought it all home, fired up the two good //c's, and then turned to the non working one, which promptly (auugh!) ate the brick. I'd like to get in there and see if I can fix it, or just rebuild it (but I'd still like to at least rebuild it inside the brick case). Does anyone know if there is a way to get these things open without ruining them? I've pushed and poked and prodded with no luck. Thanks a lot! Paul Kearns paulk(a)microsoft.com

27 years, 9 months

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World Power Systems scam

by kaikal＠MICROSOFT.com

World Power Systems: Memory boards, big ads, great prices, non-existent company. Some guy named "The Colonel" who of course wasn't. Magazine ads on credit, graphic design for said ads on credit, prepayment from customers never returned. Not just in Byte magazine, also (at least) kilobaud and Interface Age, year was 1978? Whole thing was blown by the editor of Interface Age, who was suspicious and called to "do a story" on the company. When he showed up, "The Colonel" was on the lam, and there was nothing but an empty office and a phone. An almost identical scam happened in, as I recall, 1979, when a company placed multipage color ads for a bunch of really cool, inexpensive TRS-80 Model 1 peripherals in 80 Microcomputing Magazine, then disappeared. And let's not forget Morrow, which, after changing names to Xibec (Xidec?) and announcing & taking orders for some super doozy computer called The General, also vanished overnight. Kai -----Original Message----- From: Sam Ismail [mailto:dastar@ncal.verio.com] Sent: Thursday, October 08, 1998 3:26 PM To: Discussion re-collecting of classic computers Subject: Re: World Power Systems scam On Thu, 8 Oct 1998, John Foust wrote: > Does anyone recall the month and year the "World Power Systems" > scam advertisement appeared in (was it?) Byte? What was the nature of this scam? Sam Alternate e-mail: dastar(a)siconic.com ---------------------------------------------------------------------------- --- Ever onward. Coming in 1999: Vintage Computer Festival 3.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/21/98]

27 years, 9 months

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What computers used the AMI7200 & 7300?

by dastar＠ncal.verio.com

Here's the information about pricing on the F14 CADC directly from Ray Holt. > To my knowledge the first set of chips were included into the > development price, however, as I remember the remainder of the initial > contract had a price tag of $250-$350 per chip. The ROM's were > probably a little less that that. In follow-on production (qty's of > 1000+) AMI had estimated chip prices to be under $100. I noticed I had > put $65 in my paper. And on some of the applications the AMI 7200 & 7300 microprocessors made their way into: > The 7200 and 7300 were used, for sure, in very high scientific > calculators and as i/o controllers for some mini's, however, I left AMI > right after the development so I did not get into who any follow-on > customers were. Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. Coming in 1999: Vintage Computer Festival 3.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/21/98]

27 years, 9 months

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DEC RQDX3 Controller

by healyzh＠ix.netcom.com

Could someone post the jumper settings for a RQDX3 controller? I've been trying to use my RQDX2 docs, but that won't cut it, and I can't find anything on the net. Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)ix.netcom.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.dragonfire.net/~healyzh/ |

27 years, 9 months

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6502 vs. 6800 (was Re: kits, definitions, prices...)

by mbg＠world.std.com

aha... sorry about that... shows how much I've used it recently. You're right. it is a 6800... (damn) Megan

27 years, 9 months

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6502 vs. 6800 (was Re: kits, definitions, prices...)

by mbg＠world.std.com

>> alt.folklore.computers where moron was trying to convince everyone that >>if you left the 6502 running this instruction, your CPU would literally heat >Does anybody know what system is referenced in the Jargon File under HCF >as the one that could burn up its bus lines if the processor were given >the HCF instruction? I've tried the HCF instruction on my 6502-based heathkit electronics trainer (ET-????) It was neat to watch the address lines increment and wrap... But although I ran it for a long time, it didn't catch fire... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 9 months

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Regarding PDP-11/ and rt11 too

by mbg＠world.std.com

> RT-11 legal restrictions exist... > RSX-11 No idea, but I'd expect licensing again > RSTS Licensing again? They're all covered by licenses. And are available for hobbyists, but again, only for use with the Supnik emulator. So, as you said, that doesn't help people with real iron. > Unix... AVAILABLE via PUPs support group as free binaries and 100$ > license for sources. Initially this seems good but not all PDP-11 > configurations can run unix and not all versions of Unix have the > drivers to interact with some PDP-11 hardware. So it may take a lot > of work with limited tools or none to get it going. V5, V6 and V6 are available from the same site as the Supnik emulators, and I don't believe the licenses accompanying them are as strict... and yes, the license for them is only $100. Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 9 months

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Help: Identify my board

by allisonp＠world.std.com

< Ah HA! I see it now George! The two edge connectors at the left & righ < edge of the board (as it faces us) are indeed the power and gnd connecti < for the Multibus. The board plugs into the P1 slot with those two 6-fing < edge conns. How dumb of me not to realize this. I haven't looked at the web page but it sounds like the board for a ICE85 used in a Intel 230 development system. Allison

27 years, 9 months

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World Power Systems scam

by allisonp＠world.std.com

< > > Does anyone recall the month and year the "World Power Systems" < > > scam advertisement appeared in (was it?) Byte? < > < > What was the nature of this scam? Byte, Kilobaud and interface age were all DNP for full page ads and any customer that purchased was also part of the gig. There was nothing real about them or the product. Sphere was also considered a scam though they were real and did ship some product. They failed and took a few people. This was common back then as the industry was moving very fast. Everyone thought they could do the MITS or SWTP thing but didn't have the business skills or sometimes the design skills. I also have a copy of Microtrek that only printed one issue of the mag! Allison

27 years, 9 months

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Help: Identify my board

by cfandt＠netsync.net

Ah HA! I see it now George! The two edge connectors at the left & right edge of the board (as it faces us) are indeed the power and gnd connections for the Multibus. The board plugs into the P1 slot with those two 6-finger edge conns. How dumb of me not to realize this. Man, I was looking at it from the upper edge conn. being the part to plug into the Multibus P2 connector but I was wondering how in the heck the sides of that upper edge would clear the card rack and backplane! I was thinking those 6-finger connectors were just used for I/O or something. The shape of the board is not what I'm used to seeing for Multibus boards (I've got a dozen or so of the 'traditional' style around here of various types.) Apparently I/O was handled through that edge conn. at the top of the picture, true? Thanks for this bit of info that might help me when hunting through a pile of boards at a hamfest, etc. Regards, Chris At 10:18 10/08/98 -0700, you wrote: >Your looking at an SBC 80/04 board manufactured by Intel through about >1985. Power could be obtained by plugging the board's two connectors into >the P1 slot. Again this was not a multibus board but could be plugged >into a Multibus P1 connector. > >George Rachor > >========================================================= >George L. Rachor george(a)racsys.rt.rain.com >Beaverton, Oregon http://racsys.rt.rain.com > >On Thu, 8 Oct 1998, Allison J Parent wrote: > >> < > Can someone help identify this board? It has a 8085AH CPU in the A9 >> < > socket. On the right the board says "Intel (C) 1977 MADE IN USA." On t >> < > back of the circuit board is etched "PWB1001480-03 REV H." If you wan >> < > to see what the board looks like click on my link below. >> >> Processor for a Intel model 220 development system is a good possibility. >> >> Unfortunately the copyright date on intel board has little to do with >> design and manufacture date. >> >> Allison >> >> > -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.ggw.org/freenet/a/awa/

27 years, 9 months

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IBM RT machine - info pls...

by SUPRDAVE＠aol.com

i have one as well, but no keyboard so i can't test mine. i dont think you'll find anything to run on that beast these days. best to check comp.sys.ibm.pc.rt very little traffic, but there are some ontopic posts there. In a message dated 10/8/98 5:47:12 PM US Eastern Standard Time, jpero(a)pop.cgocable.net writes: > I have offered to take fairly complete RT for nothing, what it needs > is hard drive and floppy drive (I happen to have standard 1.22MB > drive and 40MB esdi to put in it). It have most of everything, 4mb > ram and serial etc I think not enough info but it did have aix > software to put on and 1 and 1.1 I think. Yes, it has monitor and > keyboard. > > Now, what exactly how useful are these RT are and alterative OSes and > software available for RT?

27 years, 9 months

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TRS-80 Model 100 (was Re: Convergent Technologies workSlate)

by scott＠isd.canberra.edu.au

At 00:08 8/10/98 -0400, Ward Donald Griffiths III <gram(a)cnct.com> wrote: >Tony Duell wrote: >> >> > thrown in. The NEC and Olivetti versions depended on external modems >> >> I have the Olivetti version - an M10, and the PCB certainly has positions >> for the internal modem components. Now, it would be quite normal for a UK >> machine not to have the modem (our CCITT tones are different from Bell >> tones at 300 baud, and there are different approval requirements), so I >> assumed that the US model had the modem fitted. > >I have never read a report or review of an M-10 with an internal modem. >And the magazines that covered the Model 100 _did_ review the Olivetti >and NEC products, but of course those magazines were rather more than >three moves ago (per Poor Richard, three removes equals one fire), but >I do recall that they all had the same Kyocera main board with minor >changes per customer. The NEC PC-8300 (updated version of the PC-8201A, with more RAM and a few improvements in ROM, such as support for XMODEM in TELCOM) had an 300 baud internal modem as an option (only available in the US). Although my PC-8300 doesn't have a modem, it does have a single loose A4 page in the manual describing how to get Wall Street stock prices on-line. Regards, | Scott McLauchlan |E-Mail: scott(a)cts.canberra.edu.au | | Network Services Team |Phone : +61 2 6201 5544 (Ext.5544)| | Client Services Division |Post : University of Canberra, | | University of Canberra, AUSTRALIA | ACT, 2601, AUSTRALIA. |

27 years, 9 months

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eBay strangeness

by altair8800＠hotmail.com

Am wondering if it is me or if everyone is experiencing this? Someone has listed an Altair 4k memory board. The eBay item number is 34468468. Whenever I go to this listing, my computer locks up. It has happened every time I have tried since earlier in the day. Only happens with this listing and no others. It seems to happen as soon as eBay starts to download the photo from the seller's web site. I have never experienced this with any other eBay auction. Bob Wood ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 9 months

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Apple power supply problems

by allisonp＠world.std.com

< One method that I have used for years with equipment that blows fuses is < put a light bulb in line with the incoming power. Depending on the actu < correct load of the equipment determines the wattage of the bulb needed. < normal operation the bulb will light to about 1/4 to 1/2 of normal then < (typical inrush - charging caps.) If the bulb lights near fully it is This is a safe and sane method that generally results in less likelyhood of damage or injury. Some parts if "forced" may explode violently with the risk of injury or colateral damage like burnt boards. I sometime used a 110v lamp in socket with clipleads to bridge the fuse. Allison

27 years, 9 months

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VCF 2.0 t-shirts on sale [ClassicCmp discount!]

by dastar＠ncal.verio.com

I have a pile of VCF 2.0 t-shirts that I need to sell. Order now and get a $2 ClassicCmper discount on any shirt. If you order, make sure you tell me you're a ClassicCmper. See www.vintage.org/vcf for graphical depictions. There are still a few VCF 1.0 shirts left over. These are not listed on the page but they're going for $10 each. Buy one so you can say you were there, even if you weren't! (I'll even vouch for you if anyone questions your autheticity :) Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. Coming in 1999: Vintage Computer Festival 3.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/21/98]

27 years, 9 months

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kits, definitions, prices...

by allisonp＠world.std.com

< > Little-known fact: The Apple 1 wasn't a 6502 machine... it was a 6502 < > 6800 machine. < < That is *very* little-known! Either somebody got sold a 6800 machine wi < an Apple 1 label on it or there needs to be some documentation for this < claim! References? Not a big secret. It's a fact and there is a jumper on the board for it. REASON: At one point MOS Tech was going to make a 6500 that was pin interchangable with the 6800 but moto took them to court. the expectation was they would make one board that could be either 6800 or 6500. Allison

27 years, 9 months

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Help: Identify my board

by cfandt＠netsync.net

At 21:35 10/07/98 -0700, George L. Rachor wrote: >Although not a classic Multibus board this board manufactured by Intel and >would fit in a Multibus slot. It does use the power pins from a >Multibus card slot. Beg to differ, George, but the board pictured in the URL given by Alan definitely is not Multibus! Others will also agree here who either used or have Multibus hardware in their collections like myself. I don't even recognize what the thing could possibly be. An Intel OEM controller of some sort? Relatively small quantity of chips so Alan could do like Tony D. or myself would do and trace the circuits and draw a schematic to get a better idea of function. Regards, Chris > >The model number escapes me for a moment but was still being manufactured >in 1994. Could you give us a bit more info from what you recall on this board George? > >========================================================= >George L. Rachor george(a)racsys.rt.rain.com >Beaverton, Oregon http://racsys.rt.rain.com > >On Wed, 7 Oct 1998, oajones wrote: > >> Can someone help identify this board? It has a 8085AH CPU in the A9 >> socket. On the right the board says "Intel (C) 1977 MADE IN USA." On the >> back of the circuit board is etched "PWB1001480-03 REV H." If you want >> to see what the board looks like click on my link below. >> >> http://www.bright.net/~oajones/myboard.jpg >> >> --Alan >> -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA Member of Antique Wireless Association URL: http://www.ggw.org/freenet/a/awa/

27 years, 9 months

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kits, definitions, prices...

by franke＠sbs.de

> There are a handful of questions that keep getting re-hashed. > Build my SwTPC kit and play with it, or treasure it in pristine form? Ill take the burden. > Is my LSI-11 a micro, or not? Who cares > Are my XT's really classic? Of corse - I could also sell you a secon one - just $$$,$$$.$$ > Should I hack my Apple-1 to sub in a 99 GHz Pentium for the 6502? Geee what a great Idea - just go ahead. > Wanna buy a 1200 baud modem? No, I'm still fine with my 300 coupler SCNR H. (But I get your Idea) -- Ich denke, also bin ich, also gut HRK

27 years, 9 months

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Update 2 - Aquarius Data Recorders

by wanderer＠bos.nl

What kind of recorder is this? I have never seen one. Can someone tell me more about it? Thanks, Ed -- The Wanderer | Geloof nooit een politicus! wanderer(a)bos.nl | Europarlementariers: http://www.bos.nl/homes/wanderer | zakkenvullers en dumpplaats voor Unix Lives! windows95 is rommel! | mislukte politici. '96 GSXR 1100R | See http://www.bos.nl/homes/wanderer/gates.html for a funny pic. of Gates!

27 years, 9 months

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Amusing: January 1993 Sun Remarketing Catalog

by kaikal＠MICROSOFT.com

The other day I was disassembling a Lisa, and inside between the RAM boards there was a copy of the January 1993 Sun Remarketing Catalog. Here are some fun tidbits from the catalog. Anyone care to call Sun and try to order one of these part numbers? Rumor has it that Sun has a whole warehouse full of Lisa stuff that they just aren't motivated to sell. APPLE LISA Originally designed as a versatile business computer, the Lisa is more powerful than ever before. We've added new features that make it better than a Mac Plus... 800K floppy drive, 20 Mb or 40 Mb SCSI hard drive, and MacWorks Plus. LISA CPU OPTIONS - 20Mb SCSI System, $495 100-283 - 40Mb SCSI System, $545 100-481 - Macintosh XL 400K/10Mb, $395 101-140 - Macintosh XL/400K No HD, $295 101-142 - Macintosh XL/800K System, $595 101-181 - Lisa/400K Floppy System, $295 100-141 LISA ACCESSORIES - 800K internal disk drive, $159 500-800 - 2Mb RAM Upgrade, $195 200-120 - Lisa SCSI Card, $79 200-300 - Lisa SCSI Drive 20Mb, $195 501-201 - Lisa SCSI Drive 40Mb, $295 501-401 - MacWorks Plus SC, $99 402-107 - MacWorks Plus 400K, $99 402-200 - MacWorks Plus 800K, $99 402-108 LISA/MACINTOSH XL DO-IT-YOURSELF GUIDE Complete with Test Diskette The Lisa/Macintosh XL Do-It-Yourself Guide is a must for any Lisa/XL owner. The included diagnostic diskette will determine any problems that might arise be it hardware or software. If a hardware problem occurs, simply order a replacement module for the defective part and avoid costly repair bills. This manual also covers any adjustments or repairs you can make yourself. Regular Version $19 402-232 Screen Mod Version $19 402-231 Some other Sun tidbits from the catalog: MACINTOSH 128K, $195 MACINTOSH 512K, $249 MAC PORTABLE 2/40, $895 APPLE ///, $345

27 years, 9 months

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Just when you thought eBay couldn't get more ridiculous

by kaikal＠MICROSOFT.com

Just when you thought eBay couldn't get more ridiculous... Two Rockwell AIM-65's (auctioned simultaneously, ending within minutes of each other, by different sellers, weird) just sold for $406 and $472 respectively (I'll give you 3 guesses to name one of the bidders...) Kai

27 years, 9 months

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Aquarius Data Recorders

by thedm＠sunflower.com

Id pay 10 for one also, and put me down for TWO. -----Original Message----- From: Kai Kaltenbach <kaikal(a)microsoft.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, October 06, 1998 4:19 PM Subject: RE: Aquarius Data Recorders >Well, my whole Aquarius only cost $35 with mini-expander and 3 carts, so I >guess I'd go maybe $10 on a tape drive. > >Kai > >-----Original Message----- >From: David Williams [mailto:dlw@trailingedge.com] >Sent: Tuesday, October 06, 1998 1:50 PM >To: Discussion re-collecting of classic computers >Subject: Aquarius Data Recorders > > >I just received an email from a local group which has 250 new in >box Aquarius cassette recorders. They are taking bids but I >suspect you can't just buy a few but would have to take the whole >lot. I have one but could use at least one more and maybe two and >it would be nice to have the box and any doc or cables. Is there >any interest in this out there? If so, how much would people be >willing to pay? Don't forget shipping costs. Let me know. BTW, >"local" in this case is Houston, TX. > > >----- >David Williams - Computer Packrat >dlw(a)trailingedge.com >http://www.trailingedge.com

27 years, 9 months

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Update 2 - Aquarius Data Recorders

by Marty＠itgonline.com

______________________________ Reply Separator _________________________________ Subject: Update 2 - Aquarius Data Recorders Author: classiccmp(a)u.washington.edu at internet Date: 10/8/98 1:10 PM I just received more info on the Data Recorders... they had a "mis- communication", there are 3 pallets of 240 recorders each! 720 recorders total!!! They have agreed to let the pallets go separately. I'd like to know where they came up with these. Anyway, I guess I'll make them an offer on one pallet, I can't save them all. I guess the other 480 of them will hit the scrapers. Then I just have to figure out what to do with the remaining 220 recorders that haven't been claimed yet. >I can see it now... >Quick! Get your EXTREMELY RARE, IMPOSSIBLE TO FIND >Aquarius Data Recorder. No collector can live without one or three >or more! MINT CONDITION IN ORIGINAL BOX!! Opening bid only >$500. Move fast because I have to run 200 more auctions just like >this one. ;-) ;-) ;-) You forgot to include L@@K!!!! or maybe GASP!!! Marty ----- David Williams - Computer Packrat dlw(a)trailingedge.com http://www.trailingedge.com ------ Message Header Follows ------ Received: from lists3.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Oct08.131012.1767.68580; Thu, 08 Oct 1998 13:10:13 -0400 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id KAA04272; Thu, 8 Oct 1998 10:07:39 -0700 Received: from mxu2.u.washington.edu (mxu2.u.washington.edu [140.142.32.9]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id KAA60200 for <classiccmp(a)lists.u.washington.edu>; Thu, 8 Oct 1998 10:07:35 -0700 Received: from trailingedge.com (IDENT:root@trailingedge.com [208.150.226.125]) by mxu2.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id KAA00 205 for <classiccmp(a)u.washington.edu>; Thu, 8 Oct 1998 10:07:34 -0700 Received: from lovelyangel.advfilms.com (lovelyangel.advfilms.com [208.150.226.79]) by trailingedge.com (8.8.7/8.8.7) with SMTP id MAA27382 for <classiccmp(a)u.washington.edu>; Thu, 8 Oct 1998 12:07:36 -0500 Message-Id: <199810081707.MAA27382(a)trailingedge.com> Date: Thu, 8 Oct 1998 12:07:24 -0500 Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: "David Williams" <dlw(a)trailingedge.com> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Update 2 - Aquarius Data Recorders In-Reply-To: <199810081532.KAA26709(a)trailingedge.com> References: <002401bdf2b4$5324d600$42097c18(a)thedm.lawrence.ks.us> MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 9 months

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eBay strangeness

by wanderer＠bos.nl

>> Am wondering if it is me or if everyone is experiencing this? Someone has listed an Altair 4k memory board. The eBay item number is 34468468. Whenever I go to this listing, my computer locks up. It has happened every time I have tried since earlier in the day. Only happens with this listing and no others. It seems to happen as soon as eBay starts to download the photo from the seller's web site. I have never experienced this with any other eBay auction. Bob Wood << Hmm, I went to that item and out of the 5 pictures, only the last one did not get loaded for some reason. The pics do look very good however. Ed -- The Wanderer | Geloof nooit een politicus! wanderer(a)bos.nl | Europarlementariers: http://www.bos.nl/homes/wanderer | zakkenvullers en dumpplaats voor Unix Lives! windows95 is rommel! | mislukte politici. '96 GSXR 1100R | See http://www.bos.nl/homes/wanderer/gates.html for a funny pic. of Gates!

27 years, 9 months

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What was the first Unix micro?

by Joel＠VirtualAdmin.com

I was told about 20 years ago that it was Western Electric. They were the 2nd largest manufacturer of PDP-11 next to DEC and produced them under license for their "customer" AT&T. -----Original Message----- From: Ward Donald Griffiths III [mailto:gram@cnct.com] Sent: Wednesday, October 07, 1998 10:23 PM To: Discussion re-collecting of classic computers Subject: What was the first Unix micro? OK, I'm getting tired of the arguments about who made the first microprocessor. Fine. Maybe God did -- it's called DNA and as an atheist I don't grant credit to anybody. Trivia question: who made the first successful mass-produced _and_ mass-marketed (in one system) Unix hardware platform? -- Ward Griffiths <mailto:gram@cnct.com> <http://www.cnct.com/home/gram/> When I was crossing the border into Canada, they asked me if I had any firearms with me. I said "Well, what do you need?" -- Steven Wright

27 years, 9 months

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Convergent Technologies workSlate

by sinasohn＠ricochet.net

At 03:13 AM 10/4/98 -0700, you wrote: >The Model 100 OTOH is more structured around word processing, I'd say. >This could be another reason for the 100's popularity and the workSlate's >lack of popularity. The m100 has three useful programs (and two worthless ones) in ROM: BASIC, Text, and TelCom. The "operating system" consists of 4 or 5 lines of 4 columns of filenames (including the ROM based ones) which you select by moving a cursor with the arrow keys and hitting return. The other half of the OpSys was BASIC commands. What really got the m100 selling, though, IMO was the fact that it could be had at Radio Shack -- and there are (were) about a gazillion of those. How many Convergent stores were there? (Or, for that matter, NEC, Olivetti, and Kyocera, who all sold versions of the Kyocera machine that the m100 was based on.) I bought my m100 with a credit card at a Radio Shack. --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 9 months

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Heathkit H8 vs. H-89

by allisonp＠world.std.com

< Does anybody know if the H8 and H-89 were software compatible? I know < CP/M was available for the H-89 (as well as HDOS), but I've only heard < rumors of an H-8 CP/M -- maybe they're the same? They were somewhat software compatable in that the both ran 8080 based software. The H89 was z80, the H8 was 8080, they had differenet IO port and memory maps. Both had different disk formats. CPM for both could be the same in the sense that the CCP and BDOS were always the same... The bios however was likely very different as that is the part that interacts with the IO and disks. Allison

27 years, 9 months

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Update 2 - Aquarius Data Recorders

by allisonp＠world.std.com

< the other 480 of them will hit the scrapers. Then I just have to < figure out what to do with the remaining 220 recorders that haven't < been claimed yet. Are these basically portable audio recroders or something special? Please describe them. Allison

27 years, 9 months

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Latets finds

by mbg＠world.std.com

>It looks like the vt62 could be equipped with an additional printer >unit. Is this correct? It takes the same thermal printer as found in the VT55... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 9 months

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Latets finds

by wanderer＠bos.nl

Hey All, Got this weekend an Intel 8085 System Design Kit (in original box) with manuals and a Dec vt62. It looks like the vt62 could be equipped with an additional printer unit. Is this correct? Regards, Ed

27 years, 9 months

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Thrift-store goodies

by aaron＠wfi-inc.com

Light haul at the thrifts today, but a couple of nifties: "Computer Technicians Handbook, 3rd Edition" by Art Margolis - $0.95 Magnavox RGB 80 composite monitor - $4.95 Wyse 60, no keyboard - $4.95 Large PC board etching kit, unopened - $1.95 Aaron

27 years, 9 months

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Help: Identify my board

by allisonp＠world.std.com

< > Can someone help identify this board? It has a 8085AH CPU in the A9 < > socket. On the right the board says "Intel (C) 1977 MADE IN USA." On t < > back of the circuit board is etched "PWB1001480-03 REV H." If you wan < > to see what the board looks like click on my link below. Processor for a Intel model 220 development system is a good possibility. Unfortunately the copyright date on intel board has little to do with design and manufacture date. Allison

27 years, 9 months

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What was the first Unix micro?

by Marty＠itgonline.com

I second your opinion Sam. Marty ______________________________ Reply Separator _________________________________ Subject: Re: What was the first Unix micro? Author: classiccmp(a)u.washington.edu at internet Date: 10/7/98 11:42 PM On Wed, 7 Oct 1998, Ward Donald Griffiths III wrote: > OK, I'm getting tired of the arguments about who made the first > microprocessor. Fine. Maybe God did -- it's called DNA and as an > atheist I don't grant credit to anybody. Oh, ok. God forbid we discuss computer history on this list, Ward. We'll just go away now so you can fill up the list with your pointless one-line replies. Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. Coming in 1999: Vintage Computer Festival 3.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/21/98] ------ Message Header Follows ------ Received: from lists2.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Oct07.234233.1767.68426; Wed, 07 Oct 1998 23:42:34 -0400 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id UAA08061; Wed, 7 Oct 1998 20:40:21 -0700 Received: from mxu1.u.washington.edu (mxu1.u.washington.edu [140.142.32.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id UAA29970 for <classiccmp(a)lists.u.washington.edu>; Wed, 7 Oct 1998 20:40:16 -0700 Received: from mailhub2.ncal.verio.com (mailhub2.ncal.verio.com [204.247.247.54]) by mxu1.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id UAA13 302 for <classiccmp(a)u.washington.edu>; Wed, 7 Oct 1998 20:40:15 -0700 Received: from shell1.ncal.verio.com (dastar(a)shell1.ncal.verio.com [204.247.248.254]) by mailhub2.ncal.verio.com (8.8.7/8.8.7) with SMTP id UAA03164 for <classiccmp(a)u.washington.edu>; Wed, 7 Oct 1998 20:40:14 -0700 (PDT) Message-Id: <Pine.GSO.3.96.981007203816.10432B-100000(a)shell1.ncal.verio.com> Date: Wed, 7 Oct 1998 20:40:13 -0700 (PDT) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: Sam Ismail <dastar(a)ncal.verio.com> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: What was the first Unix micro? In-Reply-To: <361C2218.3E448C98(a)cnct.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 9 months

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kits, definitions, prices...

by allisonp＠world.std.com

< It looks like the only characteristic that a multi-chip implementation < partially breaks here is "highly integrated". Then again, a two-chip < implementation is not necessarily much less integrated than a single-chi < Now I wonder why this level of integration matters. Is there something < that a two-chip implementation can't do, and a single-chip can? Did < people really care about this level of space-savings to the extent that < it was worth introducing a new word into the language? The key is the limits of IC gate density of the moment. Now we can have lterally millions so complexity is very high. Back when (1970-71) teh semi houses were hitting the ceiling at about 1000 gates/2500 raw devices to a chunk of silicon. So splitting a function across two chips was not unresonable idea. It's was a reflection of *manufacturability*. < Actually, until ten minutes ago, I would have had trouble calling the < two-chip thing a microprocessor because it broke the definition I learne < as a kid: single-chip. But even the characteristic of being similar to < 4004 is relevant to the extent that you are careful in choosing which wa < it has to be similar. The first 4004's were probably in ceramic; shoul < that be part of the definition? Probably not. Why did we care about th < 4004? Is being implemented on a single chip really the important bit? < was it cost, ease of use, small size, ...? A two-chip implementation < could very well have been important to us for exactly the same reasons < that the 4004 was. The 4004 was significant at several levels. It was relatively low cost commercial product. It had a return address stack. It had a fairly large number of registers (for that time it was a very large number). There were other chips to facilitate low cost construction of dedicated systems. Being few is packages and low in numbers of pins made PCboard consturction cheap. the PMOS process used was low power compared to TTL or DTL of the time. Each one of those elements were significant relative to computer systems of the day regrdless of the type! < So, when is it useful to distinguish single-chip from, say, dual-chip? When talking at the archetecture level or when interfacing. < What kind of practical decision would someone make based on that? COST, number of pins, flexibility. The LSI-11 for example was the WD13 chip set, with differnt MICROMS it was the Alpha Micro or the WD microengine. Same chips some containing differnt microcode. If you have a LSI-11 and the rare but manufacured WCS you could acutally add instructions to your LSI-11 to suit specialized needs. This is not doable with most single chip implmentations. < BTW, was the 4004 really the first in the Intel series of 4004, 4040, < 8008, and 8080? I seem to remember that something in this sequence < actually happened in non-ascending order, like maybe the 8008 preceded < the 4004, or the 4040 came out last, or ...? It could make sense; you < could imagine scaling back an existing design to penetrate some niche < market with a cheaper part.

27 years, 9 months

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Apple power supply problems

by dburrows＠netpath.net

One method that I have used for years with equipment that blows fuses is to put a light bulb in line with the incoming power. Depending on the actual correct load of the equipment determines the wattage of the bulb needed. On normal operation the bulb will light to about 1/4 to 1/2 of normal then dim. (typical inrush - charging caps.) If the bulb lights near fully it is taking the load instead of blowing the fuse. At this time you can use a meter and find the defective component. Usual caution applies the equipment is floating if the bulb is in line with neutral. Dan Burrows dburrows(a)netpath.net -----Original Message----- From: John Foust <jfoust(a)threedee.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, October 08, 1998 12:30 PM Subject: Re: Apple power supply problems >At 08:34 AM 10/8/98 -0700, Marvin wrote: >> Running it a short time with >>the fuse shorted out heated up the chip and I was able to feel where the >>problem was. Troubleshooting vs normal operation :). > >And sometimes when you do that, the dead chips will notify you >of their new condition by blowing their tops. > >- John

27 years, 9 months

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Heathkit H8 vs. H-89

by allisonp＠world.std.com

< seems though, everybody wrote assembler code so that either the s/w chec < to see which processor was used or wrote straight 8080 asm code to just < cover everybody without having the extra CPU checking code taking up spa < Most commercial language interpreters and compilers, especially from Hea < handled 8080-based machines for sure. Generally true but, not absolutley so.. however some bios used Z80 code to do disk io or used 8080 code tricks that do not run on z80. Come from having aboth an 8085 powered s100 (explorer 8085) and a slew of z80 systems. < Allison, for the H8 there were at least two third-party Z80 CPU boards m < (I can look up the mfgrs if anybody wants) and a Heath-made Z80 board. I'm well aware of them and helped several friends bring them up. < Early on when the Z80 became rather popular, the original 8080 CPU boar < was of course found to be lacking in performance compared to the TRS-80' < N*, Kaypros, various S100's and other contemporary CP/M Z80 machines. < Hence, the little cottage industry, so to speak, which sprang up to dea < with making Z80 boards. A 4 MHz CPU by DG Micro (I think that's the name I went to z80 in early 1977 as the 8080 already had a case of impending doom being limited to 2mhz and fewer instructions. The better instruction set of the z80 was enough in itself. < really was a performer up against many other machines. The H-89 was a Z8 < machine when it first was introduced around 1980 or thereabouts. Yes, h89 was mid 1980, by then the z80 had permutated the software for cpm systems. Consider that S100 system ahd all pretty much gone z80 by 1978 and the few non z80 systems were either dual processsor like Compupro 8/16 or oddball the Autocontrol AC85 (8085/5mhz). The ZCPR CCP replacement and widespread use of z80s made for major software like languages to be 8080 compatable at the expense of performance while the system would have a bios written using z80 extended. Allison

27 years, 9 months

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Question: Godbout/CompuPro ram boards

by allisonp＠world.std.com

< I seem to recall that one (or more) of the Godbout/CompuPro ram boards u < a 2kx8 static RAM part that had the same pinout as a 2716 EPROM, and cou < support 2716s in place of some/all of the RAM chips. True or false? Ram16 and RAM17 both used 6116 2kx8 but neither were configurable for 2716 Eproms. It can be done but it would be a hack. Allison

27 years, 9 months

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AES computer with 8-inch disks?

by jfoust＠threedee.com

Below is a description of a system with some data to be rescued. I've already responded to the people mentioned, so there's no need to respond again. I asked for more details, if they had any: when was it used, what software did it run, whether the disk is soft- or hard-sectored. I have no idea, though, what kind of system this was. Does "AES" ring a bell with any Canadian readers? - John >>Sent from: Gilles Poitras <cowpunk(a)sirius.com> >> >>This is from a mailing list for theological librarians that I am on. >> >>Can anyone help out? >> >>>"Accelerating obsolescence" strikes again. >>> >>>Professor Dr Hans Rollmann, who supervises one of the more elegant and >>>elaborate sites on the WorldWideWeb for the Department of Religious Studies >>>at Memorial University in Newfoundland, has found some important primary >>>data that he hopes to mount with other texts on the site. These data are >>>imprisoned on 8-inch computer disks that were made on an AES computer, >>>apparently in the 1980s. No printed record of the material survives; only >>>the 8-inch disks remain. No AES computer or 8-inch drive exists at Memorial >>>University; the technical services people from the Computing Sciences >>>Department tried to build an 8-inch drive from spare parts, but came up >>>short. The intellectual content frozen in this "obsolete" technology >>>remains unreadable. >>> >>>Does anyone know the whereabouts of an intact AES computer? Failing that, >>>is there any available information about these machines? What did the >>>acronym AES stand for? Where was it built? Most important, what operating >>>system did it use? What word processing software might have been loaded? >>> >>>Has anyone preserved any computer with an 8-inch disk drive? As I recall, >>>both Commodore and Atari used 8-inch drives. >>> >>>Anyone who has useful information on this problem can communicate with >>>Professor Rollmann at >>> >>> hrollman(a)morgan.ucs.mun.ca >>> >>>Those who may be interested in his religious studies web site can begin >>>sifting through its many layers at >>> >>> http://www.ucs.mun.ca/~hrollman >>> >>>Professor Rollmann will be grateful for any assistance anyone can offer. >>>The rest of us need to be sure that any intellectual material we >>>"catalogue" can also be "read."

27 years, 9 months

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North Star Horizon Help

by bobstek＠ix5.ix.netcom.com

I have a manual for the N* HRAM series which I'd be happy to copy and send you - email me. There are some differences between revision B and E boards and there are lots of jumper options. In summary, S1 and S2 select the active memory areas, JP1 selects the bank status on reset and selects I/O control bits for bank switching and parity, JP2 selects areas to be bank switched, JP3 selects the parity error response, JP4 implements the First Quadrant option (only revision E 48K version), and JP6 is reserved (no jumper). Bob Stek bobstek(a)ix.netcom.com Saver of Lost SOLs (and the occasional Horizon)

27 years, 9 months

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Question: Godbout/CompuPro ram boards

by ddameron＠earthlink.net

Hi Jim and all, At 10:50 PM 10/7/98 -0700, you wrote: >Can anyone confirm this vague memory, or set me straight? > >I seem to recall that one (or more) of the Godbout/CompuPro ram boards used >a 2kx8 static RAM part that had the same pinout as a 2716 EPROM, and could >support 2716s in place of some/all of the RAM chips. True or false? > >And if true, was there any special configuration that needed to be done for >the 2716s? > A 6116 is a 2kx8 static ram. The only difference in its pinout from a 2716 is pin 21. For the 6116 it is /write enable (active low). For the 2716 it is V(program). For read it is tied to 5V, it needs a higher voltage and current, up to 5mA, so just a TTL "1" isn't enough. Can you jumper this pin to +5 volts? -Dave

27 years, 9 months

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kits, definitions, prices...

by yakowenk＠cs.unc.edu

Hey, several threads just coalesced in my head. (Ouch!) There are a handful of questions that keep getting re-hashed. Build my SwTPC kit and play with it, or treasure it in pristine form? Is my LSI-11 a micro, or not? Are my XT's really classic? Should I hack my Apple-1 to sub in a 99 GHz Pentium for the 6502? Wanna buy a 1200 baud modem? The problem is that we have so many different backgrounds and goals, everybody has different answers to those. So, when these questions come up, maybe instead of arguing about the right answers, we could gain more by digging backwards to the *reasons* for the different answers. Here are my two cents: Most of my stupid sample questions revolve around differing valuations. Sources of value. 1. Nostalgia I had/wanted one of these once. 2. Education This is really different from stuff I already know. 3. Preservationism There are only three left on the entire planet. If I don't protect it, soon there won't be any. 4. Usability I make practical use of it. 5. Money There are only three left on the entire planet. Somebody must be willing to pay a lot for it. .. any more? So building a Heathkit is good for reasons 1, 2, and 4; and bad on 3 and 5. In my own collection, different items hit different buttons. I play games on my Radio Shack Color Computers, so they hit button 4. I also hack around in machine code on them, so they hit button 2. And I've done quite a bit of work with 6809's, so they hit button 1 as well. (No wonder I have such a pile of CoCos!) My SwTPC kit is still unbuilt for reason 3. It doesn't hit buttons 1 or 2 so hard because I also have an assembled one which covers those nicely. (Man, I'm a lucky guy!) And it seems my own button 5 isn't connected to anything. But other peoples' seem to work just fine. The one sample question still unanswered is a definition thing. So maybe the root question should be, why is one definition better than another? I learned the definition of microprocessor to be a single-chip CPU, and a microcomputer to be a computer based on a microprocessor. But I never questioned it. Why is that a useful definition? Maybe it is a measure of how hard it would be to build a system around it. Which in turn could be correlated with cost, and so with popularity. By that reasoning, if you get the same functionality out of a smallish chip-set as a single chip, and the price is the same, both should be considered as micros. Or maybe it has more to do with physical size of the end result; if you have a single chip instead of four, it leaves you with more room to put the rest of the computer on that same PC board. Maybe that could be really important for hobbyists. (I know my own attempts at homebrewing were all SBC's.) But there is a red herring in all this. External VLSI support chips are a convenience. You could have built an 8080 system without the 8228. You would just use a boatload of TTL instead. So again, the issue is probably just cost of doing so (money, time, space). Was the 8080 more expensive in any way because of the 8228's existance? No. Was it any less of a microcomputer? Either the 8228 was enough of an improvement over the boatload of TTL that it made 8080 systems doable (ie, made it a micro), or maybe the lack of the 8228 circuitry in the 8080 chip itself still made it impractical for some (ie, made it a non-micro). It depends on where your thresholds are. You can still argue about whether or not the 8080 without an 8228 is a complete CPU, but my point is that this may not be worth arguing. What is the practical impact of having the entire CPU on one chip vs. two? How does it change anyone's behaviour? *That* could be worth some discussion. I have my own ideas about which things are micros and which are not, but in retrospect, the definition that I was taught is not a useful one; it does not classify things into categories that I can use to any benefit. Cheers, Bill.

27 years, 9 months

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Question: Godbout/CompuPro ram boards

by CLASSICCMP＠timaxp.trailing-edge.com

>I seem to recall that one (or more) of the Godbout/CompuPro ram boards used >a 2kx8 static RAM part that had the same pinout as a 2716 EPROM, and could >support 2716s in place of some/all of the RAM chips. True or false? True! The part is the Hitachi (or compatible) 6116P-2. >And if true, was there any special configuration that needed to be done for >the 2716s? It depends on the exact board; most boards that would take either had a jumper per socket to set RAM vs EPROM. Which board are you specifically interested in? When I bought out the stock of the last remaining Compupro dealer I ended up with most of the manuals in addition to hundreds of boards... This feature certainly wasn't confined to Compupro; there were several dozen other manufacturers of memory boards that did this, too. Most of the time the jumpers are pretty obvious, though some weren't below requiring the user to do PC board surgery. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 9 months

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RT-11 on 8" media

by CLASSICCMP＠timaxp.trailing-edge.com

> Is there available on the Web this info? Probably, but the authoratitive source for this sort of thing is the manual that matches the version of RT you're interested in. > Also, I have an 11/73 with RT-11SJ V5.0.... it has an 8" drive. >What would I have to do to make a bootable minimal floppy on this >machine? In other words how few files can one get away with to wake >up a PDP11 with only an RX02 clone as it's mass storage? That's easy: SWAP.SYS, TT.SYS, DY.SYS (or DX.SYS or whatever driver your hardware uses for the 8" drive), and a monitor (RT11SJ.SYS). This gives you a bootable minimal floppy which is capable of doing very little :-). Almost certainly you want to put PIP, DIR, DUP, FORMAT, and other useful "recovery utilities" on as well (BUP if you use it, your favorite editor, etc.). And certainly the drivers for any other devices you may be interested in. And, of course, after putting the files on the floppy, you want to make it hardware bootable too! COPY/BOOT DY:RT11SJ DY:, for example. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 9 months

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Latets finds

by franke＠sbs.de

>>> It looks like the vt62 could be equipped with an additional printer >>> unit. Is this correct? > I believe the VT62 is somewhat related to the VT52. The VT62 is a VT52 with inverse video. thats all. Gruss H. -- Ich denke, also bin ich, also gut HRK

27 years, 9 months

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Latest finds

by franke＠sbs.de

> I got the kit for 50 guilders ($25), which is not a bad price if > you ask me for such a near complete kit. As for the moment, I don't > ha

27 years, 9 months

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New Finds

by jrkeys＠concentric.net

Today I walked into a thrift store and found a stack of Popular Science, Popular Mechanics, and others going back to 1974. I got real excited thinking I would find that had Altair on the cover (does anyone remember which issue that was ?), but no luck. I did get a October 1977 issue that covers home computers for $595. In it were pictures and write-ups on the following: Commodore PET Heath H-8 (article says new H-11 uses DEC LSI-1) Radio Shack model 1 Altair 8800 Single-board 8084 from IMSAI Southwest Technical's 6800 Sol Terminal Computer Technical Design Labs Z-80 Xitan Compucolor The Digital Group Cromeco Z-2 Poly 88 from PolyMorphic Vector Graphic Vector 1+ Challenger System from OSI EPA 6800 with hexidecimal keyboard There were many more mentioned in the article, all together I purchased 12 different issues at 7 cents each. Got a few manuals for cpu's, software, and printers all for 7 cents each. Got three apple IIc power supplies for $1 each along with various commodore power supplies for the same price. As soon as someone can tell me the right issue I will go back looking for it. John

27 years, 9 months

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