test-drb

test-drb@ccmp.vtda.org

101090 discussions

Ideas for disposing of entire collection

by robert.stek＠gmail.com

Thanks to those here and on comp.os.cpm who have responded publically and privately with some ideas I had not considered before. I know there is at least one ebay selling service in Tucson, a solution I hadn't thought of. I wouldn't mind spending the time describing items correctly if that's how I go. I would be hoping that they have the space to take it so I could get it organized for them. I will also get in touch with Sellam. I have been to a few users group meetings here in Tucson but have never met anyone suffering >from the classiccmp disease - perhaps a few weeks worth of notices on Craig's List might scare one or two out of the woodwork. To those who have responded with wish-lists: the biggest problem in my current situation is that too many boxes are labeled "Old computer stuff" or even those that are labeled '8" disks' are in X different boxes in Y different places, usually with boxes in front and on top of them! If I could easily retrieve specific items I would rather they go to people on the lists who appreciate them. Alas, when I packed them away I fantasized that I would have sufficient room to organize everything properly - the reality is that I don't. If I go through an ebay service I might be able to pull some stuff that people have mentioned. I was surprised (thrilled?) to hear that at least one person thought $15-$25k was a reasonable ebay estimate. Frankly that about twice what I would estimate (at least in today's economy!). Maybe I should just sit on it all for the next 2-3 years and wait until one of the next Web 3.0 millionaires wants a legacy collection! Jim Battle, you and Barry Watzman are the only 2 people I know with working Helios systems. If I find those Helios disks I lent you a few years ago, you two guys can split them if you want them. Bob Stek (former) Saver of Lost Sols

17 years, 4 months

ISO older PROMICE manuals

by aek＠bitsavers.org

Does anyone have copies of the various revisions of the Grammar Engine PROMICE? I have a manual for a really early version of the device, and have a few of them of various vintages made in the 90's which neither match my manual, or the current versions.

17 years, 4 months

Replacing failed powersupplies on qbus PDP-11s

by toby＠coreware.co.uk

Hi, I have a couple of uPDP-11 boxes (BA23) with failed power supplies. Being no expert on repairing switch mode power supplies (and to be frank slighly scared of trying), is there any reason why I shouldn't adapt a ATX power supply from a PC to provide the required voltages? Most ATX power supplies offer pretty meaty 5V and 12V feeds plus a fairly small -12V (~0.3A) feed. Will I need to generate a LTC/BEVENT L signal if I go down this route? Finally, does anyone know of any good guides on repairing switch modes? Whilst not keen, I guess I should bite the bullet (hopefully not literally) and learn how to repair them. Thanks, Toby -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

17 years, 4 months

Simulation vs breadboarding (was Replacing failed powersupplies on qbus PDP-11s)

by aek＠bitsavers.org

> Until the boss sees that you screwed around in the lab for an hour or > two getting all the parts and building the test circuit I doubt any company newer than 10 years old even has lab stock any more to breadboard something with. I'd end up going to Haltek or Halted for parts, because Apple killed off their parts stock room when the hardware group was moving from Valley Green to Infinite Loop. One day I went over to it and it was empty. They had dumped the whole thing into recycling because none of the hardware engineers used any of it anymore.

17 years, 4 months

Ideas for disposing of entire collection

by robert.stek＠gmail.com

I have been mostly a lurker on the classiccmp lists for the last 10 years or so, though I have had individual correspondence with Jim Battle, Dave Dunfield, Rich Cini, Allison, and a few others ? I think they would vouch for me. I?ve been mostly an S-100 and CP/M guy, and I have probably used more impulse than sense in collecting micro stuff. My worst sin has been in putting off any systematic cataloging of my collection, and unfortunately I am not in a position to do it now. What I describe later on is from memory ? there are all sorts of miscellaneous things as well. The time has come for me to liquidate 90% of my collection. I won?t give it away ? my kids can deal with it after I?m dead! I started to sell it piece by piece last year and sold about $3,000-$4,000 worth on ebay (I know, boo-hiss! But that?s where I got most of it from.) I would rather not go this route again, except perhaps for my Altair or one of my IMSAI?s. I am willing to take a loss if I can dispose of this stuff in bulk, but want this to be as painless (for me) as possible. All of this stuff has been packed away in moving boxes for at least 4-5 years and I no longer want to have to take it out, photograph it, test, troubleshoot, write accurate descriptions, re-package for safe shipping, take it down to UPS or the P.O., deal with eBay, etc. So, questions for the group: 1) Does anyone here have an interest in acquiring my collection and is willing to come to Tucson (7 hour drive from San Diego) and pick it all up? 2) Does anyone here know of anyone ? a computer museum, a collector not on this list, anyone else of unsound mind ? who might be interested? 3) Any other ideas on eliminating hassles from individual sales and shipping? 4) Anyone want to take a guess at a value of the collection as a whole? a) if individually priced on ebay or b) Entire lot value It?s all packed well enough for storage or shipment in a van, but most would need to be re-packed for individual shipment. Part of the problem is that while individual boxes are generically labeled (i.e., 8? disks, BYTE mags, Votrax, monitor, etc.) I have no simple or easy way to put the appropriate docs and disks together with the hardware (nor the room to even attempt it). I think I did a fairly good job of rounding up original docs and boot disks (or good copies thereof) for most of the equipment. It would be a shame to let that effort go to waste if I eventually decide to go the ebay route after all; I would have to sell it all ala carte as I come across it. To give you an idea of some of the items (almost all with complete documentation, extra S-100 boards and boot software if appropriate, and most were known working when put in storage) here is a good part of the collection that I still have: 2 or 3 Processor Tech Sols (have extra foam pads for 1 keyboard restore) ? original docs Ithaca InterSystem S-100 ? original docs 2 IMSAI?s ? original docs 1 Altair 8800 ? some docs 2 NorthStar Horizons, 1 with HD ? original docs 1 CompuPro 8/16 ? original docs 1 Morrow Decision 1 with HD ? original docs (the big iron, not the MicroDecision) Many, many S-100 cards ? 8 and 16 bit CPUs, 4k thru 256k memory boards, Matrox video, disk controllers, almost all w/ original docs 1 Lobo System with HD ? original docs 3-4-5? Circuit Cellar SB-180 systems, 1 with HD ? original docs 2 NOS Xerox Z-80 64k systems w/ 5 ?? dual drives ? original docs 2-3 KayPro?s ? original docs Televideo 925 terminal Older memory chip tester Pro-Log M882 8080 analyzer Z-80 MicroProfessor Digital Group programs on cassette Many original ProcTech programs on cassette w/ original docs Multiple SS/DD and DS/DD 5.25? disk drives, some in cabinets w/ PS, most not Several monochrome composite monitors Collection of text-to-speech units, 3-4 Votrax and a large DEC-Talk plus a few others ? original docs BYTE magazine from, v1#1 through mid to late 80?s Many issues of Creative Comp, complete Kilobaud, S-100 Microsystems, early Dr. Dobb?s, Interface Age, Computer Shopper, Lifeboat Lifelines, etc. 2 dual 8? drive systems 2-3 Apple II Plus 2-3 Apple Z-80 cards Ohio Scientific Challenger (C4P? ? can?t remember, plus I may have sold this last year, not sure but I think it?s still here) w/ docs Franklin Ace 100 (the original one with the Apple II ROMs that led to landmark court decision allowing copyrighting of software) 1-2 early Macs Mac LC w/ MS-DOS card Cables ? lots and lots, from RS-232, Centronics parallel, to power cables to ribbon cables to . . . . Lots of original software and docs: boxed sets of Digital Research CP/M, CP/M-86, CP/M-Plus, CBASIC, Concurrent CP/M ? all from DR in slip cases, WordStar, Magic Wand, Palantir, dBASE II, Microsoft BASIC-80, baZic, Lifeboat Associates CP/MUG disks, lots of NorthStar format software, NOS Dysan 10-hole hard-sector disks, complete International NorthStar User?s Association newsletters and disks, complete original SOL Users Society newsletters, etc.) IBM XT TrackStar 6502 card for IBM Baby Blue Z-80 card for IBM IBM AT Central Point Match Point card, several Option boards . . . and this is just the stuff I remember. Bob Stek Saver of Lost Sols P.S. If I can?t sell it all in one swell foop, I MAY consider offers for individual pieces from list members, but I would REALLY like to sell everything at once. Please don?t ask for any particular item right now ? I?ll let everyone know if I do decide to do that later.

17 years, 4 months

Video pinouts for Sony SMC-70G

by adamg＠pobox.com

Josh Dersch wrote: > Just acquired one of these bad boys and I've found very little info on > it -- it appears to have two video out connectors -- a 25-pin D-sub > labeled "RGB Multi Out" and an 8-pin DIN labeled "B/W Multi Out." > Anyone know the pinouts of these? If you're still looking for pinouts, here they are: http://www.eskimo.com/~adam/smc70vidpin.pdf Sorry about the huge PDF file. Since you have the G (genlock) model there should also be RGB video on BNC connectors. > Any ideas what kind of monitor I can expect to use with this machine? For authenticity, a KX-1211HG, CPD-120 or PVM-1270Q. Otherwise, a Commodore 1080 or 1084 or whatever. > Anyone have manuals/software archived? I have a little bit of stuff... I'll drop you a line if/when I archive it... probably some time in 2015? :) Amazingly enough Sony still lists a SMC-70G manual as available to order. The part number is 3-773-522-22. If you feel like taking a $20 gamble you can order it online at servicesales.sel.sony.com or servicesplus.us.sony.biz or by phone at (800)488-7669. You might end up with a hefty bound manual or you might end up with 2 xeroxed pages. I have no idea what it is other than it's an instruction manual for SMC-70G serial number 20211 and later and it's not one of the ones I have. -- Adam

17 years, 4 months

speaking of 3.5" floppies, is 720K R.I.P.?

by chrise＠pobox.com

I don't have an answer for the other gentleman's query on 720RPM floppies but I recently discovered that new 3.5" drives appear to no longer support 720K media. I purchased a number of Samsung drives for a project where I am converting a system with 5.25" drives to use 3.5" and I found that these drives have left out the media density sense switch all together! They no longer have any way to detect the lower density, 250kbps media and run at 500Kbps no matter what is installed. I needed the 300 rpm, 250Kbps capability to be compatible with the old 5.25" stuff. What's particularly nasty is that I chose these drives, Samsung SFD-321B, because I had a recent datasheet that clearly showed they supported this mode-- until of course they arrived and the switch/sensor is not even installed! Is this true of all 3.5" drives now? This might explain why 720K 3.5" drives are selling for $285 on eBay :-( I'd sure like to find a way to force the drive into 250Kbps mode-- I can't believe the chips don't still support it-- I just need a way to figure out where the sensor is supposed to connect and hard wire it to 720K mode. Any ideas on how to do that? Chris

17 years, 4 months

PDP-7's

by aek＠bitsavers.org

> I seem to recall that there was one in Australia oops, forgot that one. Max Burnett's

17 years, 4 months

Microdata Reality in Sandy, Utah

by sellam＠vintagetech.com

There is a Microdata Reality in Sandy, Utah that needs a new home. This is a large and heavy early- to mid-1970s mini in a 6 foot cabinet. Please contact me directly if you're interested and I'll pass along the contact info. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

17 years, 4 months

Printronix P-600 and Qume printers available

by jws＠jwsss.com

Printronix P-600's availability "soon" in St. Louis. I'm posting for a friend who has as many as three which may be retired and scrapped. These are well maintained, but obviously elderly printers. The Qume is a wheel printer I posted about some time ago w/o any response. Reply off list unless there is a useful comment, obviously. Qume printer is in Evansville, In. Jim

17 years, 4 months

Anyone have a line on batteries for the NLS portable oscilloscope?

by ajp166＠bellatlantic.net

> >Subject: Anyone have a line on batteries for the NLS portable oscilloscope? > From: Ethan Dicks <ethan.dicks at gmail.com> > Date: Wed, 04 Feb 2009 13:51:59 -0500 > To: classiccmp at classiccmp.org > >Hi, All, > >The topic of replacement batteries came up in the Yahoo Group >for the RB5X, and someone posted a link for 2 volt 2.5 Amp-hour >cells (which are apparently used in an older version of the robot >than mine)... > ><http://www.batteryweb.com/hawkersla-detail.cfm?Model=0810-0004&label=single…> > >I saw the image and immediately thought of my NLS portable oscilloscope. >I'd love to refurb mine, but $45 in batteries is a little on the high >side for me. >Has anyone on the list replaced a set of this sort of battery, and does anyone >know of a place that stocks them for a bit less? I've replaced the min my NLS MS-15 and MS215 portable scopes, I usually pay around 8-9$ each (it uses 3) for them new. Google "2V 2.5AH Gell cell" you get mroe than afew hits. Note any 6V gellcell that fits in the form factor (NLS has an area) will also work. I've found 6V/2.2AH Yusa and others that fit in mind and they can be cheaper usually under 15$. If your really game 4 nicads of the 1800-2200mah size fit there but require the charger side to be modded for constant current rather constant voltage. Allison > >-ethan

17 years, 4 months

Old Software rights (was content rights)

by vern4wright＠yahoo.com

Dan, My first comment is - watch your back! --- On Thu, 1/15/09, Dan Gahlinger <dgahling at hotmail.com> wrote: > From: Dan Gahlinger <dgahling at hotmail.com> > Subject: Old Software rights (was content rights) > To: cctalk at classiccmp.org > Date: Thursday, January 15, 2009, 8:48 AM > In an unrelated topic, > > I have a bunch of old programs from my University days, > back in the late 70's, early 80's > all Vax/VMS code, in various languages, etc. > > In those days we never put "(C)" or copyright > notices on code. > I'm just wondering if it's generally "ok" > to release this code to the public? > > It's been 30 some years (longer than copyright would > apply anyhow). > I have searched for 20 years for some of the authors and > never found anyone. > > 14 years ago I posted pieces of it, and said "if > anyone objects to this, please contact me" > and never got any response from anyone. Just an experience I recall observing. A guy was posting old games on USENET (don't recall which group), from the CP/M to early IBM PC era - games for which no owner could he could find, games that seemed to be abandoned. And then one day he announced that he would no longer be doing this, having been warned by his ISP and having received a cease and desist notice from a law firm. > The system and associated parts used for the development > are long gone. Copyright is a can of worms, particularly with the obscenely long period that has been recently legislated. And there will always be someone willing to threaten action. Your examples seem safe, but I would be quick to be responsive to any request to "desist". > But another age old question, who has rights to code > developed on the universities equipment? > I know it's a common question these days, but > "back in the day" such considerations never > occurred, > it was a different era. I well recall those days when software was free, included in the rental of the mainframe. Until unbundling and the "Program Product" which would rent or sell independently from the machine. IIRC, IBM's H Assembler for OS/360, first NEW product issued under the unbundling agreement, rented for $250/mo. in 1970 - which would be something more significant these days. Those days really ended around 1970. It's particularly annoying in the area of OS's for our classic computers, which remain under copyright to companies which may have gone belly-up, been absorbed and forgotten by their buyers, etc. Getting an old CP/M machine without the OS, and not having a legal source for it, makes 'criminals' of us all. And it's damned unfair! > Everyone from that era has also vanished with the wind, I > know, I've looked. > > So is it fairly safely abandoned? > Another way to look at it - If it was your code, some small > silly thing you wrote, would you care? Now that is a very GOOD question. There are a lot of things I've written that I would NEVER want seen - by ANYONE; guess they're in the class of 'silly'. Most of my serious software belongs to entities (alive or dead), under 'work for hire'. If it were distributed with their blessings, it wouldn't bother me; I've been paid - though never enough :) OTOH, I have several proprietary systems I have written for the use of my own business AND I WOULD EXPRESS SERIOUS ANNOYANCE if they were somehow obtained and distributed. But they have never been shared, and the likelihood of it happening seems small. That said, good fortune. Vern Wright > Dan. > > _________________________________________________________________

17 years, 4 months

Straight 8 was PDP-7s

by evan＠snarc.net

How about the straight 8 ... There were 1500 made; how many of these still survive? 1. We've got one here in MARCH / NJ.

17 years, 4 months

searching a metal box for 11/04 5.25in high

by henk.gooijen＠hotmail.com

Hi all, I noticed an 11/34 on eBay (# 200302612244) which reminded me of the 11/04 that I have in similar size / housing. Just as the machine up for auction, I am missing the black metal box into which the unit is placed and mounted in a 19" rack. So ... if anybody has an empty box, I am very interested! thanks, - Henk, PA8PDP

17 years, 4 months

bitsavers down?

by legalize＠xmission.com

My RSS feed generator has been erroring out for a while now. Apparently I can't fetch www.bitsavers.org/pdf/Whatsnew.txt Can anyone else get there? Is this a known problem? I haven't seen it mentioned on the list. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

17 years, 4 months

PDP-7's

by aek＠bitsavers.org

> Where is there a register of PDP-7 systems? I know of only two, personally. Three, the U Oregon system, CHM's, and the one in Oslo.

17 years, 4 months

bitsavers down?

by aek＠bitsavers.org

It was down for a few days. I had hoped Jay was upgrading the server. The ccmp web server is on the same machine.

17 years, 4 months

IBM 1401 "Edith" program?

by jfoust＠threedee.com

A fan of my ASCII art page sent this question. I hadn't heard of it before. - John >Date: Tue, 3 Feb 2009 15:15:23 -0500 >Subject: Re: Beautiful old alpha/character art >From: bayard <catron at gmail.com> >To: John Foust <jfoust at threedee.com> > > >Do you have a copy of the output of the legendary EDITH program? I googled around and all i found was a picture of the punch cards! > ><http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110304561718>http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110304561718

17 years, 4 months

Digital Lives Conference at the British Library

by Jeremy.John＠bl.uk

I wonder if any classic computer specialists would be interested in attending this conference. Please do let me know if so. Best wishes, Jeremy. CONFERENCE FOR DIVERSE SPECIALISTS: ARCHIVISTS, CLASSIC COMPUTER EXPERTS, DIGITAL PRESERVATION, HISTORIANS, CURATORS, AND SOCIAL SCIENTISTS ___________________________________________ DIGITAL LIVES RESEARCH CONFERENCE 2009 Monday 9 February to Wednesday 11 February 2009 at the British Library, London Scientists, historians, writers and IT specialists will come together to address the challenge of organising and preserving personal digital archives at the first ever Digital Lives Research Conference, which will be inaugurated by British Library Chief Executive Dame Lynne Brindley. The conference will address (i) how libraries and archives can help all people whose lives are becoming increasingly digital - particularly academics - to secure, preserve and organise their personal archives of digital photographs, documents, correspondence and multimedia, for themselves and their families; and (ii) the possibility of establishing relationships with providers of online services and social systems technologies. Topics will range from digital curation and digital preservation to the creation of personal digital archives and their use by historians, biographers and scientists. Highlights include: (i) Keynote Lectures by biographers Georgina Ferry and Andrew Lycett, psychologist Charles Fernyhough, historian Orlando Figes, and archivist Dorothy Sheridan of the Mass Observation Archive (ii) Invited Presentations by George Oates, member of founding team at Flickr, Simone Brunozzi of Amazon Web Services and Ian Hughes of IBM (iii) Keynote Presentations by computer scientists Mark Baker of University of Reading, Peter Bentley of University College London, Annamaria Carusi of University of Oxford, Jon Crowcroft of University of Cambridge, Kieron O'Hara of University of Southampton and Dave Taylor of Imperial College London. (iv) A Writers in Conversation session on the creation of digital archives, featuring Tony Benn, Dame Antonia Byatt and Wendy Cope, and chaired by pioneering computer scientist Dame Wendy Hall (v) Day 3 of the conference will involve the participation of visitors and inhabitants of virtual world Second Life, with the conference broadcast onto the Elucian Islands , the Second Life home of Nature Publishing Group and Macmillan Publishers. There will be a keynote lecture by Timo Hannay, Publishing Director at Nature.com (vi) A presentation on 'Digital Life at the Extremes' by polar explorer Ben Saunders See: www.bl.uk/digital-lives/conference.html for further details. The first day of the conference will focus on the latest approaches to curating digital objects and archives. The second day will look at the development of such archives from the point of view of the creators and researchers - writers, scientists and historians. The third day will offer an overview of life online and digital archives as they are developing at present. The conference is FREE to attend on the 9 and 11 of February, registration is required as space is limited. There is a registration fee of ?35 for 10 February, but WAIVERS ARE AVAILABLE. Please register at the Digital Lives Research Conference 2009 website: www.bl.uk/digital-lives/confreg.html ***APOLOGIES FOR CROSS-POSTING*** About The Digital Lives Research Project The Digital Lives Research Project is led by the British Library and is designed to provide a major pathfinding study of personal digital archives, and is funded by the Arts and Humanities Research Council (AHRC). The project team is drawn from University College London and University of Bristol as well as the British Library itself. ************************************************************************** Experience the British Library online at www.bl.uk The British Library's new interactive Annual Report and Accounts 2007/08 : www.bl.uk/knowledge Help the British Library conserve the world's knowledge. Adopt a Book. www.bl.uk/adoptabook The Library's St Pancras site is WiFi - enabled ************************************************************************* The information contained in this e-mail is confidential and may be legally privileged. It is intended for the addressee(s) only. If you are not the intended recipient, please delete this e-mail and notify the postmaster at bl.uk : The contents of this e-mail must not be disclosed or copied without the sender's consent. The statements and opinions expressed in this message are those of the author and do not necessarily reflect those of the British Library. The British Library does not take any responsibility for the views of the author. *************************************************************************

17 years, 4 months

DECwriter correspondent manuals?

by pat＠computer-refuge.org

Does anyone have manuals or any information about the DECwriter correspondent? I managed to grab one today, and would like to at least look at the docs before I plug it in, and turn it on, if anyone can find a copy.. Thanks, Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

17 years, 4 months

Looking for Xerox 914 docs.

by rollerton＠gmail.com

Not quite a computer but maybe a distant relative. I am looking for anything on the Xerox 914; anything operation, maintenance, or marketing material that I can get a copy of. Its for a uh, performance that I am involved in and I would like to be more technically accurate in describing the machine and its operation. Thanks!

17 years, 4 months

Any spare Corvus Concept hardware out there?

by derschjo＠mail.msu.edu

I assume the answer to the subject line is "no," but I figured I'd ask just in case one of you has a stack of this stuff lying around somewhere :). Picked up a Corvus Concept -- just the main CPU unit, no monitor, no keyboard, no drives. It appears to work (it beeps when I turn it on!) but of course lacking any other hardware it's a rather bulky doorstop. I'd like to get it running, it's a cool 68k-based machine with a bit-mapped display and Apple II (!!) compatible expansion slots. (Are there any other machines out there that used the Apple II bus for expansion? Aside from Apple II-family machines and clones, of course...) I suppose given enough time I could build a compatible monitor, hack together a keyboard interface, and get it booting over OmniNet but somehow having the original hardware would be nice too... Thanks, Josh

17 years, 4 months

Stack Depth requirements for CP/M 2.2 CBIOS

by ajp166＠bellatlantic.net

> >Subject: Stack Depth requirements for CP/M 2.2 CBIOS > From: "ROBO5.8" <robo58 at optonline.net> > Date: Fri, 30 Jan 2009 19:08:49 -0500 > To: "'General Discussion: On-Topic Posts Only'" <cctech at classiccmp.org> > >Hello, > >I have rewritten my old systems CP/M 2.2 CBIOS to add an IDE Drive. > >I've run into a problem that has me stumped. Everything works as long as I >don't try and copy or assemble a large Assembly file (>80KB). > >I will be going along fine and then out of nowhere I will see CP/M request >access to Drive "T". My debug info says SELDSK is requesting Drive 0FF00h. > Ok this is easy. CP/M 2.x (2.2 nominal) can only address 16 logical drives so that's limitation one. Each drive is limited to 8Mb (65525sectors*128bytes). If you use one of the CP/M like imperoved work a likes this is less an issue and logical drives can be much larger (up to 1gb). >I have added debug code to all the CBIOS routines so that they report what >they are doing to the console (slow but nice). > >I've gone through my code many times and tested each routine via an embedded >debug monitor. I believe I have added every CP/M 2.2 patch (1-6 and 9)that >is specific to the CBIOS including those dealing with Blocking/Deblocking. Good but likely not the problem itself. > >In the back of my mind I kept wondering if I was exceeding CP/M's Stack >Depth. I can find no information on the web or in my doc's that specifies >what the maximum Stack usage is for a CBIOS. This does not could like a stack size issue. That tends to be very static for any disk size. >Do any of you have any thoughts on my Stack Question? Are there other >issues with Blocking/Deblocking that become visible with large Disk Drives, >and that are not covered in any of the published DRI patches? Wrong plase to look. Likely areas of breakage: More than 16 drives Alloc storage areas inadaquately sized or overlapping BIOS local variables being trashed. Bios logic in error (deblock, sector addressing other??) Allison >Thanks for your assistance. >Robo

17 years, 4 months

Seeking reverse-engineers - Apple II VisiCalc

by mc＠media.mit.edu

I am looking for volunteers to help reverse-engineer and document Apple II VisiCalc. Besides documenting this for future historians --I plan to give all this work to the Smithsonian-- I'd like to get Apple II VisiCalc running in emulation. Right now this isn't possible because of the copy protection. (BTW the PC DOS version is available on the web, and doesn't have copy protection). I have three versions of the Apple II software. I know one of them still boots (1983?) and have some confidence that the other two versions (1979 and 1981) work too. I have been in contact with both Bob Frankston and Dan Bricklin. Of course you ask, well then why do you need volunteers? The answer is because no one can find the sources. Bob and I plan to dig around his garage when the weather gets warmer, but there are no guarantees, and the 30th anniversary is in October 2009. --Tim McNerney http://www.4004.com

17 years, 4 months

Atomic bomb replica maker in Waukesha, WI

by jfoust＠threedee.com

Not computer-related, but certainly geeky, research and reconstruction: http://www.newyorker.com/reporting/2008/12/15/081215fa_fact_samuels?printab… - John

17 years, 4 months

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test-drb