test-drb May 1998

test-drb@ccmp.vtda.org

148 participants
673 discussions

Why does the Apple ][ have a hardware-encoded keyboard?

by ard＠p850ug1.demon.co.uk

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26 years, 1 month

FW: Budpest Collector needs help

by kyrrin＠jps.net

Found on Usenet. One of our fellow collectors in Budapest needs help with, of all things, a Russian version of a MicroPDP-11/23. If anyone can help him along, please contact him directly. Thanks! Attachment follows. -=-=- <snip> -=-=- From: hamster(a)lord.banki.hu (Akos Varga) Newsgroups: vmsnet.pdp-11 Subject: Knowledge on soviet uPDP models? Date: 31 May 1998 14:00:03 GMT Organization: Banki Donat Polytechnic, Budapest Lines: 20 Message-ID: <6krnp3$rhv$1(a)goliat.eik.bme.hu> NNTP-Posting-Host: lord.banki.hu X-Newsreader: TIN [UNIX 1.3 unoff BETA release 960804] Path: blushng.jps.net!news.eli.net!news-sea-20.sprintlink.net!207.12.55.130!news-west.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!howland.erols.net!surfnet.nl!news-ge.switch.ch!news.bme.hu!lord.banki.hu!not-for-mail Does someone with some knowledge of the russian MicroPDP models reads this group? I acquired a machine called MIKI Micro 11/23 System 2500 Team Computer, and it seems it has a russian F-11-clone CPU and some rather strange cards with cyrillian letters on it. The cards are probably from the Soviet company "Elektronika". Now I'm not familiar with these cards, although I could identify them. I'd like to make this machine working again, can someone provide me with some information on how to do this? If yes I can write down all boards and the components on them... This is gettinig iteresting, a soviet uPDP :) / ___ _ _ ___ ____ ___ ___ /__//__///_///__ / /_ / ) Varga Akos Endre hamster(a)netweb.hu / // // /___/ / /__ / ( www.netweb.hu/hamster/english.html ---------------------------------------------------------------------- PDP 11 Page http://www.netweb.hu/hamster/pdp-11/ Old Irons http://www.netweb.hu/hamster/oldiron/e_index.html ---------------------------------------------------------------------- -=-=-=-=-=-=-=-=- Bruce Lane, SysOp, The Dragon's Cave BBS (Fido 1:343/272) kyrrin {at} j<p>s d[o]t n=e=t "...No matter how hard we may wish otherwise, our science can only describe an object, event, or living creature, in our own human terms. It cannot possibly define any of them!..."

26 years, 1 month

Books

by jfoust＠threedee.com

At 12:56 AM 5/31/98 -0500, Doug Yowza wrote: >> >> Not to mention some undoubtedly fascinating volumes on traffic >> signals. > >I actually felt a little guilty about that. Supposedly, that's how >Microsoft got its start, right? I think Gates & Allen's first "company" was "Traf-o-data", run on someone else's PDP equipment. I recall it was analyzing traffic data. I only remember because about the same time, I was doing nearly the same thing as my Eagle Scout project, summarizing traffic and accident data for a city. Gates and Foust, the ominous parallels, oh yeah. :-) - John

26 years, 1 month

Books

by fmc＠reanimators.org

Doug Yowza <yowza(a)yowza.com> writes: > I bumped into Frank "Reanimator" McConnell and Paul "Sun Worshiper" Coad > today, and while Paul scrounged for Sun parts, Frank and I did the > "one for you, one for me" thing over a pile of old^H^H^H classic books. > We both left behind the most complete Modula-2 library I have ever seen, Not to mention some undoubtedly fascinating volumes on traffic signals. Here's what seems to have followed me home: Arithmetic Operations in Digital Computers, Richards, 1955 Computer System Organization: The B5700/B6700 Series, Organick, 1973 (Oooh! Another stack machine!) Currents in the Theory of Computing, Aho (ed.), 1973 Decimal Computation, Schmid, 1974 Implementing Software for Non-Numeric Applications, Waite, 1973 Information Theory and Coding, Abramson, 1963 Internal Sorting Methods Illustrated with PL/1 Programs, Rich, 1972 Low Density Parity-Check Codes, Gallager, 1963 Microprogramming Primer, Katzan, 1977 Sequential Machines: Selected Papers, Moore (ed.), 1964 Systems Programming, Donovan, 1972 Oh, and the IEEE 802.2 (LLC), 802.4 (token bus), and 802.5 (token ring) standards. Curiously enough, I was looking for the first of these at work this week, and the last one may be of use to me too. > After I get my study-at-home PhD in Obsolete Hardware Engineering, I'd be > happy to loan/trade/sell a few of these titles. Similar offer: if you're in the San Francisco Bay Area and have an interest in these, ask, I'm willing to loan them out. Maybe even if you're not in the Bay Area and can convince me that sending them is a worthwhile thing to do. I definitely want to read the Organick book first, though. -Frank McConnell

26 years, 1 month

Intel 8008 CPU date codes

by allisonp＠world.std.com

<I just lucked into a few 8008's and they don't use a date code I <recognize. Can somebody interpret for me: < 1209A < 0276R < 1464B < unknown. Tempting to find one and put it in a board I have from '74. <BTW, the chips are stamped C8008. Is there any significance to the "C"? Cermet, ceramic/metal package. The I8008 were silicone plastic. they are intel parts either way. Allison

26 years, 1 month

Why does the Apple ][ have a hardware-encoded keyboard?

by allisonp＠world.std.com

<That I'd heard before, which is why I'm so supprised by the <hardware-encoded keyboard in an otherwise software-driven machine. Things you cant do with a software scanned keyboard: Key pressed interrupt, if the cpu doesn't scan the keyboard it cannot sense activity. It takes some chips extra then to sense any key pressed and cause a interupt to initiate a keybard scan and debounce routine to see what happend. The keyboard chips did n-key rollover and buffered at least one keystroke. Fewer signal carrying wires in the air, the keyboard encoders were slow and didn't create much RFI, scan lines off the bus or a port can be quite noisy. Allison

26 years, 1 month

Processing data in blocks

by fmc＠reanimators.org

Roger Ivie <IVIE(a)cc.usu.edu> wrote: > Wordstar on the Otrona Attache was also very WYSIWYG because the Otrona > could do any video attribute Wordstar every dreamed of: italics, underline, > strikethrough, bold, etc. See what happens on this list? If you aren't careful, you can learn something new every day! I stand corrected; I used Wordstar on less-capable video. And now I'm wondering whether I could get Wordstar on the HP150 to do this sort of thing.... -Frank McConnell

26 years, 1 month

[Off Topic] Just so you all know...

by DSEAGRAV＠toad.xkl.com

As of about 10 minutes ago, I am no longer a high school student. I graduated :) I come back here next year as part of the staff. They're hiring me to run the TCP/IP equipment. And, my 11/44 still has a home... -------

26 years, 1 month

EC-1 (was Re: Re[2]: Computer Values)

by chrish＠knet.kootenay.net

Try looking at http://www.heathkit.com/parts.html for parts and repair centers also to get old manuals and scimatics look at bottom of the url page phone 616-925-5899 At 10:06 PM 29/05/98 -0500, you wrote: >On Fri, 29 May 1998, Joe wrote: > >> Yes, but are they still valid if the owner is out of business? I know >> the HK manuals are WIDELY copied and the copies sold. So are Tektronix, HP >> and a lot of others, and they're still in business! > >Heathkit *is* still in business, just not quite the same business: > http://www.heathkit.com > >-- Doug > > >

26 years, 1 month

Intel 8008 CPU date codes

by ddameron＠earthlink.net

At 05:19 PM 5/30/98 -0500, you wrote: >I just lucked into a few 8008's and they don't use a date code I >recognize. Can somebody interpret for me: > 1209A > 0276R > 1464B > >BTW, the chips are stamped C8008. Is there any significance to the "C"? > >-- Doug > Don't know about the date code, but for Intel the "C" means ceramic package, vs. P, plastic. The "H" is a Hermetic (2 pieces of ceramic that look like they are cemented together). I think "C" is the only version the 8008 came in. -Dave

26 years, 1 month

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test-drb May 1998