test-drb April 1999

test-drb@ccmp.vtda.org

170 participants
1190 discussions

by CLASSICCMP＠trailing-edge.com

>Hmm, if the RLV11's go into a ABCD backplane, and the BA11 is such a >backplane (18 bit all 9 slots have CD connected) could you plug a backplane >into the BA11 using one of those extender ables (two dual connectors on >each end) ? It's not exactly clear to me what you're asking, Chuck. If you're asking a general backplane expansion question, the answer is probably contained in Micronote 29, *Q-bus Expansion Concepts*, available over the web from http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/microno… Only the AB slots are continued between backplanes, not the CD slots, in any conventional configuration. Note that there are both 18-bit and 22-bit bus cable-cards; the M9400/01 series are 18-bits, and the M9404/05 series are 22-bits. For more information on 22-bit vs 18-bit options, see Micronote 5, *Q22 Compatible Options*. According to Micronote 5, not only does the RLV11 pay attention only to the low 18 bits, it also uses backplanes pins BC1 and BD1 for purposes other than BDAL18 and BDAL19, so other things are likely to break if its plugged into a 22-bit backplane. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 8 months

RL02->11/73 more info

by jpl15＠netcom.com

Thanks to Tim, Jerome and Tony D. so far. I have more info after dragging the little puter out of it's rack. The backplane is third-party, not DEC, and has integral termination (no terminator card per se.) It has 8 quad-height slots. 1A-B M8192YB 1C-D MTI MXV22 (RX11 clone) 2A-B MTI MLV11M HD cont. 2C-D ?? 306 BootRoms etc. 3A-B M8043 quad SLU (console) 3C-D blank 4A-B Camintonn MLV11-J 4x SLU 4C-D blank 5A-B blank 5C-D blank (was Pertec VRG-Q) 6A-B Camintonn 256KW MOS [4164] 6C-D blank 7A-B blank 7C-D blank 8A-B blank 8C-D blank The HD is a Rodime and boots RT11SJ Ver 5.02 The RX02 is a single Mitsubishi 1/2 height 8". The system boots and runs as it is above. LP and LQ are on the second (3rd party) SLU, and the RT11 complains on boot if it's taken out. SHOW DEV shows TT; LD; DL; DY; LP; LQ; NL: VM; and XL. Question: Is the RLV11 appropriate and if so, which slots do they go in? Thanks again for everyone's help Cheerz John

25 years, 8 months

first DEC machine

by emu＠ecubics.com

Hi r, ---------- > From: R. Stricklin (kjaeros) <red(a)bears.org> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: first DEC machine > Date: Saturday, April 03, 1999 8:55 AM > I'm beginning to think that there should be a card to plug into the two 40 > or so pin headers, and that this card is what actually provides the SPX > graphics the machine supposedly had. It's not there. YES ! That should be a good idea. I tried this on my box, removed the color option and i got the same LED configuration. But don't forget : without the color option, you still have a monochrome workstation. Only problem is, if you don't get the color option, you need a different cable for the monitor. (the monochrome signal is not simply on the green one, would be to simple ;-)) So you have the BC19S cable which is the cable for the color option, in the monochrome case, you need the BC19P cable. cheers, emanuel

25 years, 8 months

OT: Classic Bicycles?

by max82＠surfree.com

Well, I found what I was looking for: A lunatic that collects bicycles. He has more bicycles than some of you have computers (certainly more than I do). Check out http://www.sheldonbrown.com/bicycle.html --Max Eskin (max82(a)surfree.com)

25 years, 8 months

Apple stuff....

by roblwill＠usaor.net

>Depending on where you are ... Business Depot here in Canada still sells >the Apple cables as does the Black Book company. I think BD is Staples in >some parts of the States as well as Canada. > I think I'll try OfficeMax - There's one about 10 miles away. >Try your local elementary school for the printer. Trade your experience >or technology expertise for it. <g> They treasure their Apples like gold. Every room has a //c or ][, they even still have a few TRS-80's. They haven't stepped up to Macs yet. Having them subscribe to this list may ba a good idea - The computer lab consists of 40 Tandy 1000 TL2's. In the Ambridge school district, they won't let a piece of computer equipment go until it either won't turn on, or smoke starts pouring out of it. The High school has a Mac Classic that has the case held together with duct tape because someone knocked it off the table. The picture is crooked on it now, too (I think the yoke somehow got twisted). -- -Jason Willgruber (roblwill(a)usaor.net) ICQ#: 1730318 <http://members.tripod.com/general_1> > Brian Mahoney

25 years, 8 months

RLV11/RL02 ->11/73?

by CLASSICCMP＠trailing-edge.com

> In a box (from Dave, IIRC) I have found (3) three RLV11 cardsets, >the printsets for same, and the printsets and drawings for the RL01 >and 02. This is kinda like going thru the pockets of an old coat >... >... I know that Zane has successfully attached RL02s to his 11/73, and >I wanna do that, too... You're fine, as long as your 11/73 has less than 248 kbytes in it. The RLV11 won't DMA any higher than 18-bits; if you've got 256kbytes or more of RAM, you want a RLV21. > The 11/73 has an RQDX2 and one RX02 8"... tell me how much more >info to provide and I'll do that. I'm going to try to install the >boards, but the little backplane is stuffed and I need to re-arrange >some things. Oh, yes, the backplane: You need two adjacent slots with the "CD" bus. Depending on what else you have, this may not be possible in a BA23. > Wait... will RLV11s go in the 11/44??? That would be major cool, >as well... No, the RLV11's won't, but a RL11 will. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 8 months

classic back ends?

by cmcmanis＠mcmanis.com

Ok, so the subject is a bit provocative, actually the question isn't that bad. Are there backends for the GCC compiler tools for the 'classic' computers out there? I'm particularly interested in a PDP-11 back end at the moment as it seems that I could easily port uC/OS II to the 11/23 and have something useful without forking over the RT11 dough. In lieu of that, if I compile programs using RT11 under Supnik's emulator can I run them on a "real" 11 legally? --Chuck

25 years, 8 months

Rebirth of IMSAI

by allisonp＠world.std.com

<I doubt that any of the old stuff I have, much of which, incidentally is <older than the 21-year-old to which you referred, will run at that 10MHz It's not as old as the altair or some of the other goodies like the MDS-800 that was part of the VT100 development. What makes it significant is it's still in use! <rate, though I once used an ordinary Z-80A at 12 MHz with a BUNCH of 2147' <(that's power-hungry, basement-heating, fast, static RAM). Unfortunately, Yep, used them also, 2167s (16kx1 45ns) were available to me and they were nicer. <almost no peripherals would talk to it without half a dozen or so <wait-states. That was in a hand-wired application and not in an S-100, <where, although you can interface the processor, RAM, and ROM with just a <gate or two, the bus interface takes about a hundred. (not really, but quit <a few!) On a good day about 14 each board. <If I go the route of hand-wiring something for the S-100, I'll probably us <one of the WD1002-series bridge controllers I still have lying about. I They work well or the old ISA-8bit controllers. <About ten years ago, Someone gave me several of the XCOMP STS board pairs, <but tuned for 8" rather than 5.25" drives' data rate. I imagine they spen <a lot of time in someone's desk drawer, in order to keep the boss from <learning he'd paid for yet another item they couldn't use. Those might be <interesting to try out. They may be interesting if the caps havent died of old age. Allison

25 years, 8 months

OT: Linux was Steve Gibson's NEWS of a Stunning NEW Search Engine ...

by rigdonj＠intellistar.net

Hi, I got this from Steve Gipson (author of SpinRite) and thought some of you might be interested since you're Linux fans. I haven't tried the search engine that he's talkng about so I have no idea if his claims are factual. Joe >Return-Path: <mailbot(a)grc.com> >To: <rigdonj(a)intellistar.net> >From: Steve Gibson's MailBot <mailbot(a)grc.com> >Date: Fri, 02 Apr 1999 19:57:16 -0800 >Acct: <rigdonj(a)intellistar.net> >Subject: Steve Gibson's NEWS of a Stunning NEW Search Engine ... > >Hello, > >We've all experienced the problem: > >The automated search engines (like Alta Vista) return 54,321 >items "in no particular order" (many of which are porn sites). >But the human-indexed search services (like Yahoo) often can't >find what you want because they're only able to index a small >fraction of the entire web (since they're human.) So you're left >with the uneasy (but probably accurate) sense that what you want >is out there somewhere ... but you're no closer to finding it. > >The truly amazing new solution: > >A couple of extremely bright guys at Stanford University solved >the Web Search Engine Problem once and for all, creating the last >search system you will ever need: http://google.com/ > >What's their secret? They use Linux-based web robots to explore >and index the entire Web. But then they determine the QUALITY of >each resulting link based upon the QUALITY of the OTHER sites >that link INTO that site. So, THE ONLY WAY a site can be highly >rated, under Google, is if other highly rated sites have links >pointing into it! It's brilliant. > >This simple concept works SO WELL that every single person I've >told about Google has switched permanently to using Google as >their Web search engine of choice. It really is that good! > >And of course it's free! ... so give it a shot for yourself!: > > <a href= "http://google.com" >Google</a> > >(NOTE: You received this news because you chose to receive my >notes about "Important PC Industry Happenings". If you're unhappy >about this, you may visit your personal preferences page using >the link below. I hope you've found this information useful!) > >Steve Gibson. > >________________________________________________________________ >You may easily edit your profile, or remove yourself from this >eMail system entirely, by visiting your personal page anytime: ><a href= "http://grc.com/x/ne.dll?-dhyngyd2-" >Edit Profile</a> >Please DO NOT REPLY to this message since it will only be seen >by my mailbot. If you need to contact my office for any reason, >please write to: <a href= "mailto:offices@grc.com" >eMail Us</a> >

25 years, 8 months

homemade computer for fun and experience...

by allisonp＠world.std.com

<I have so many TTL's and LSI's and some VLSI's, CPU's of all <kinds (intel, Zilog and others), memories, different crystrals and <oscillators. Should it be single board with everything on it in <stages or do it modular via cards? Check the www.psyber.com/~tcj, there is a lot of info and back issues are available. <SRAM or DRAM? With dense srams (2 62256s is 64k!) that is an easy choice for small memories (64->128k). There are designs out ther ethat are 3.5" foot print and work well with 3.5" floppies and IDE or scsi drives. Allison

25 years, 8 months

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test-drb April 1999