test-drb October 1998

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1141 discussions

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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

25 years, 9 months

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 | +--------------------------------+-------------------------------------+

25 years, 9 months

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 | +--------------------------------+-------------------------------------+

25 years, 9 months

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

25 years, 9 months

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

25 years, 9 months

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/

25 years, 9 months

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?

25 years, 9 months

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. |

25 years, 9 months

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

25 years, 9 months

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

25 years, 9 months

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test-drb October 1998