test-drb September 2001

test-drb@ccmp.vtda.org

256 participants
661 discussions

by gunther＠aurora.regenstrief.org

Hi, I know a place where they're selling a TANDEM CYCLONE mainframe: * Description: Clycone Mainframe Computer Cabinets with Himalaya K series Disk drives. Data Files and hard drives have been removed. * MFG: TANDEM * Model: CYCLONE * Condition: Used - Good * Size: 24x24x50 * Weight: 700 * Year of Manufacture: 1993 it's in Kansas City, MO. Starting bid is $50, increment $50, reserve not yet met :-(. 8 days to go. No, it's not ebay. Don't bid against each other. I'm not interested myself, neither in the computer nor in the sale of it. Just thought it may be a good deal. Let me know if you're interested. cheers, -Gunther -- Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org Medical Information Scientist Regenstrief Institute for Health Care Adjunct Assistant Professor Indiana University School of Medicine tel:1(317)630-7960 http://aurora.regenstrief.org

23 years, 2 months

Apple II 800K Diskettes?

by mythtech＠Mac.com

> It will work fine as long as it's an older Mac. Most of your >PPC based Mac's, especially those running OS 8.6 and newer, have >trouble with the 400k and 800k formats. I have had some formating problems on PPC macs and 800k disk. The format seems to work, but the disk is usually unreadable in an older 800k drive (1.4mb drives seem ok). Reading and writing to a preformatted 800k disk has never been a problem. So I either format a disk in an older non PPC machine, or I also have a blank 800k disk image that I can copy to a disk, that always seems to work fine (the image was created off a disk that was formatted on a non PPC mac). 400k is a totally different issue. A: I believe the drives themselves may be incapable of working with 400k, but more importantly B: starting with OS 8.0 (I think it was 8.0), MFS file support was dropped. No MFS, no 400k disks. 800k disks use HFS so there isn't a problem there. Of course, I keep a handy dandy LC kicking around for just this very issue (the LC connects nicely to my ethernet network, and runs 7.1 so it will read and write 400, 800, 1.4mb, DOS and ProDOS disks, giving me access to all of the above on my iMac). -chris <http://www.mythtech.net>

23 years, 2 months

Icom Attache up for auction

by r_beaudry＠hotmail.com

Hello all, I never thought I'd say this here, but then I also never thought I'd see what I saw on 09/11... My ICOM Attache is up for auction on eBay. It is an "Auction for America" item, which means that I do not see a single penny of proceeds. I have elected for the winning bid to be donated to the September 11th Fund. The Attache is NOT complete, so see the description and pictures for more details... It does include some documentation and schematics http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1278512829 It was hard to give this up, but it was a cakewalk compared to what others have lost. Bidding was already up to $202.50 this morning, but I hope someone will go higher... Also, some of you might consider doing the same. I didn't have a spare $202 in cash, but I did have this computer to donate the proceeds... Rich B.

23 years, 2 months

Zilog 8000

by mcguire＠neurotica.com

On September 24, Chad Fernandez wrote: > I used to have a terminal like the one in the picture. I had it before > I knew much about computers. Mid to late 80s, I think. I found it in a > trash dump, on a farm, while my dad and I were putting up a tree stand, > on some property owned by the father, of a lady at church. I wish I > still had it, at least then I could document exactly what it was. Hmm...They look like Lear-Siegler ADM-3A terminals to me... -Dave -- Dave McGuire Laurel, MD

23 years, 2 months

HP & Compaq

by dittman＠dittman.net

> So what's everyone think about the newest merger, between HP > and Compaq? It sure explains why Compaq killed Alpha. -- Eric Dittman dittman(a)dittman.net

23 years, 2 months

Apple II 800K Diskettes?

by mythtech＠Mac.com

>I just acquired an Apple IIgs (thanks Rich!) and am anxious to try it out. I >have downloaded the system software from the Apple site but an unsure how to >go about making 800K disks for use on the IIgs as none of my local computer >stores stock 800K floppies. Is it possible to cover over the hole that tells >the drive that it is a HD disk and format it as an 800K disk? Will the 800K >drive on the IIgs be able to read it? Or do I have to find a source for real >800K media? I have used HDs as DDs before (specifically on the Mac, so it is relivant to your situation, as it is dealing with going from 1.4 to 800 or 400k). I can tell you that it does work, but not reliably. The data seems to fail over time, not so much length of time, but read/write time. Unfortuantly, the length varies greatly (and seems format dependant, not disk dependant). Sometimes they work for a dozen or so uses, other times they might work for 100 or so. Once they start to fail, reformatting them seems to refresh the usability. I have learned that it simply isn't reliable enough except to use for short term temporary work. HOWEVER, the good news is, MEI Micro still seems to sell DD disks. They only sell them in a 500 pack for $50, which is kind of a bummer, but at least they can be bought. You can find them on MEI's web site (but not in their print catalog) at http://www.mei-microcenter.com. I have used their floppy disks in the past and have never had any problems with them. Last time I bought their disks, I believe they were actually generic labeled Sony's, but that was some years ago, and I would guess they get their's >from lowest cost suppliers, so that might have changed by now. -chris <http://www.mythtech.net>

23 years, 2 months

Ohio Scientific computer rescue underway

by SUPRDAVE＠aol.com

Got an email from someone saying he saw my OSI C1P in my online collection and he's got 4 of them in various configurations he will be sending to me. I can't wait to see what I've got. Would be cool if they had disk drives and such. I think they are all basic C1P models though.

23 years, 2 months

Archiving floppies?

by kees.stravers＠iae.nl

On 2001-09-22 classiccmp(a)classiccmp.org said to kees.stravers(a)iae.nl >Does anyone have any recommendations on software (preferably free) >for archiving old DOS floppies? What I'd like to do is to be able >to make disk images of all (okay, maybe just 'many') of the old DOS >floppies I have so that if they disks get trashed or the bits fall >off I can remake 'em. The DISKCOPY command from DRDOS 6 and 7 can do this, e.g. DISKCOPY A: C:\FLOPPY.IMG and the other way around works too of course. The DRDOS DISKCOPY command exe file also works under msdos. Kees -- kees.stravers(a)iae.nl http://home.iae.nl/users/pb0aia/ http://www.vaxarchive.org Net-Tamer V 1.08.1 - Registered

23 years, 2 months

Source for technical manuals?

by pete＠dunnington.u-net.com

On Sep 24, 9:00, Tony Eros wrote: > I'm trying to remember a web site I used to visit that had a number of old > computer and instrument service guides for sale. I bought a Heathkit EC-1 > assembly manual from them. Now, I can't seem to recall the name of the > place -- doesn't look like I saved the address in my browser bookmarks, > either. I know it's not abebooks or alibris -- any suggestions? This rings a bell, and I thought I had something of the sort bookmarked. These may not be exactly what you're looking for but they may help: http://www.manualserver.com/ http://njcc.com/~hjohnson/ http://www.instruction-manuals.co.uk/cattable.htm http://www.tardis.ed.ac.uk/~itda/ http://w3.trib.com/~rollo/index.html or http://www.bomarc.org/ http://www.accesscom.com/~gamba/manuals2.html http://www.sarasota-electronics.com/samsrch.htm http://members.tripod.com/NRWILLIAMSON/HEATHMAN.htm http://www.circuitarchive.co.uk/heath.htm http://www.manualman.com/products.htm I expect a web search would turn up lots more. -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

microcoding a PC into a PDP-11 (was: RE: Classic Computers vs. Classic Computing)

by pete＠dunnington.u-net.com

On Sep 14, 19:03, Jonathan Engdahl wrote: [ Pete wrote : ] > > Why not burn it into (EP)ROM? 64K for the opcode jump table fits in a > > 27512, you maybe want about the same again for the code, and that > > would fit > > in some devices used for BIOS ROMs these days. Or put it on a SIMM or > > DIMM. > That actually was my first idea. That way, the hacked PC would be almost > indistinguishable from a real PDP-11. The hard drive would contain an exact > image of a PDP-11 disk, with no underlay of PC-ish partitioning. > > But I'm not sure how much ROM space is available on modern PC mainboards. Does it matter very much? There's at least 64K bytes for the BIOS ROM and often twice that or more. Besides, that's why I suggested a SIMM or DIMM. What I had in mind was a bootstrap in the "BIOS" ROM socket and an EPROM or two on a home-made SIMM/DIMM with the main code. > You can probably tell my x86 coding skills are really rusty. Most of my x86 > programming has been either on an 80188 (many years ago) or in C. But, you > get the idea. Mine are worse :-) 80x86 is one of the few common architectures I've never written any amount of assembly language for. > Lots of detail unresolved: condition codes, for example. My suggestion, > forget about them until you get to a branch instruction. Use the native x86 > condition codes. The architectures are probably sufficiently similar. In the > example above you might have to insert "and bx,bx" or whatever the x86 > equivalent is after the MOV to set the condition codes PDP-11 style. (I > think MOV sets the N and Z flag, right?) Sets N and Z according to the value left in the destination, clears V, leaves C unaffected. -- Pete Peter Turnbull Network Manager University of York

23 years, 2 months

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test-drb September 2001