- test-drb@ccmp.vtda.org - classiccmp.org

Need Freon TF Substitute for Head Cleaning

by dhquebbeman＠theestopinalgroup.com

> Hmmm... perhaps a pond-control system of some sort would be a good use > for one of my classic computers. :-) ROFL!! 8D

26 years

2
1
0 0

Jim Battle's SolACE: The next steps

by dhquebbeman＠theestopinalgroup.com

> I am glad that Jim has released his Sol emulator (if you didn't see his > message look at http://www.thebattles.net/sol20/solace.html) He has done a > fantastic job - Sol owners and Sol-wanna-be owners owe him a tremendous debt > of gratitude for making the Sol live again. His web site already has a very > good collection of both usable software and documentation (much of > generously shared by many list members). I was quite blown away by what I found. Sounds like what you've mentioned below, when added to it, will improve it another step, and I suppose I'll have to match your hand and fill in the remaining gaps with my moldy old stuff. > I propose to make it even better. I have begun OCR'ing and pdf'ing the > paper documentation I have. And I have just compiled a tape to send Jim > (including such goodies as Microsoft BASIC for the Sol, MSA BASIC, 8080 > Checkers, Computer Mart of NJ Dynamic Debugging System, Electric Pencil, and ^^^^^^^^^^^^^^^^^^^^^^^^ Ooo, I remember wanting to get that, I guess it'll be easier now! > With Jim's approval I am willing to act as a clearinghouse for any and all > donations of programs and documentation to be made available on Jim's > website. I would prefer originals (with the understanding that I will VERY > carefully copy and return them) or good, clean copies of any ProcTech Sol > programs and documentation which are not already available on his site. I > will catalog, research, annotate, OCR, PDF, convert, etc. whatever I can and > transfer same to Jim for inclusion on his site. I will try to track down > copyright holders and even make this stuff legit (if necessary). Either this weekend, or one two weeks hence, I'll see if I can find my tapes and dust off the SOL and get copies made of each and get them to you. Bob, did you add the zero-crossing fix to your casette interface? Do you have the SOL manual scanned and converted to PDF? I'll be making five photocopies of the one I'll be selling on E-Bay in a few days, and I can scan any pages I might have that you might not have, and forward them to you. Wow, I wish there was this much interest in Primes! -doug q

26 years

2
1
0 0

Jim Battle's SolACE: The next steps

by r.stek＠snet.net

I am glad that Jim has released his Sol emulator (if you didn't see his message look at http://www.thebattles.net/sol20/solace.html) He has done a fantastic job - Sol owners and Sol-wanna-be owners owe him a tremendous debt of gratitude for making the Sol live again. His web site already has a very good collection of both usable software and documentation (much of generously shared by many list members). I propose to make it even better. I have begun OCR'ing and pdf'ing the paper documentation I have. And I have just compiled a tape to send Jim (including such goodies as Microsoft BASIC for the Sol, MSA BASIC, 8080 Checkers, Computer Mart of NJ Dynamic Debugging System, Electric Pencil, and others). (okay, okay, so there may be some copyright issues here! But putting those aside....) I can OCR and PDF documentation. I can repair (some) cassette tapes (the pressure pad often comes unglued, but Radio Shack has repair kits) and make backup copies on new cassettes. But I can't do what Jim can do. Jim has already designed and hosted the website I only dreamed of. I would prefer that he spent his time on improving and extending SolACE. So here's the deal ... With Jim's approval I am willing to act as a clearinghouse for any and all donations of programs and documentation to be made available on Jim's website. I would prefer originals (with the understanding that I will VERY carefully copy and return them) or good, clean copies of any ProcTech Sol programs and documentation which are not already available on his site. I will catalog, research, annotate, OCR, PDF, convert, etc. whatever I can and transfer same to Jim for inclusion on his site. I will try to track down copyright holders and even make this stuff legit (if necessary). Obviously I am an extreme example of a Sol nut. But I do think that the Sol played a pivotal role in the evolution of personal computers, and it deserves a chance to shine again nearly 25 years later. This is an example of a little project that the classiccmp list is in a unique position to help along. So how about it? Go out to that storage shed, dig deep in that cellar, see what you can find. Check out Jim's website, and if he doesn't have what you have, then drop me a line. I'll let you know if it is something I am already working on or not. Note to Sellam: might make a nice freebie for the VCF - I bet Jim could provide SolACE and program or two, and I'd be willing to do a little write-up about ProcTech and Sol. I can see the advertising now: Attend the VCF and receive your very own 8080 Sol computer!

26 years

2
1
0 0

Running GS/OS On an Apple IIgs

by mrdos＠swbell.net

I have been trying very hard to get GS/OS running on my Apple IIgs ROM 1. I downloaded the disk images from Apple, and the disk seems to duplicate OK on a 3.5" 720K DOS Disk, but I get an UNABLE TO LOAD PRODOS message on the Apple IIgs. Does anyone have any ideas? Thanks, Owen

26 years

2
1
0 0

CBM Plus/4 malfunctioning...can anyone help?

by mrdos＠swbell.net

I believe I have a Plus/4 I'm not using. I'll check. OK?

26 years

1
0
0 0

PDP 8/I stuff

by xds_sigma7＠hotmail.com

Ummm, I have most of an 8/i, not enough for it to work though.. no docs, software, tty, etc. though. Will J ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

26 years

2
1
0 0

Need Freon TF Substitute for Head Cleaning

by dhquebbeman＠theestopinalgroup.com

> On Tue, 11 Jul 2000, Sellam Ismail wrote: > > Um, before you do that, please know that is is most probably illegal to > > send such a substance through the mail. I'd check with the post office > > and different carriers before you just sent a bottle of that stuff off. > > Excellent suggestion... not to mention the possible illegality of > shipping it. One never know's what it's illegal to to transport > between states; just the other day, I learned that it's a federal > crime to send or sell someone, in certain states, water hyacinths for > a pond, for example. Uh.... a thing which is illegal in one state but legal in another cannot, by definition, be a federal crime. There are grey areas, like the Mann Act, which deal with transporting minors across state lines, but each state can define "minor" differently. Did you mean "felony"? Or were you referring to how the establishment acts about it when you commit it? That, I *do* understand... -dq

26 years

2
1
0 0

Z80 Starter kit plus ...

by ethan_dicks＠yahoo.com

--- Neil Cherry <ncherry(a)home.net> wrote: > I have a Z80 starter kit... which I've torn apart and reassembled. Just to clean it? > This one is rather nice in that it came with a power supply, connectors > and a wire wrapped section already added. Fancy. I picked one up at a junk store in L.A. a couple of years ago for $10. It just had wires dangling from the end that originally went to some PSU somewhere. I was especially interested in this because it had a built-in EPROM programmer and a couple of S-100 slots (unpopulated in mine, and needing +8V unreg) If I still had any S-100 boards, I'd have probably done more with it by now (I gave away all my S-100 goodies to a friend a number of years ago - all 68000-based, lots of serial ports from a project from work) Do you have any plans for your Starter Kit? -ethan It was probably used at a local > community college (Mercer?). The wire wrap job is very pretty (hey it's > art work :-). I also picked up an Applied Microsystems Corp. EM-180B (Z80 > diagnostics emulator). Soes anyone have any docs on any of this? > > I've had experience with the emulator (I worked with the 6802 and 6809 > emulators). So I've been able to use it, I just want to know what the > rest of the bells and whistles do. > > Thanks > > -- > Linux Home Automation Neil Cherry ncherry(a)home.net > http://members.home.net/ncherry (Text only) > http://meltingpot.fortunecity.com/lightsey/52 (Graphics) > http://linuxha.sourceforge.net/ (SourceForge) ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Get Yahoo! Mail – Free email you can access from anywhere! http://mail.yahoo.com/

26 years

2
1
0 0

PDP 8/I

by djg＠drs-esg.com

I assume you have seen the stuff on highgate and my website. I am working on a search for the documents, Highgate doesn't have all the scanned documents online, the search will have them all. I will also have the search have the option of converting to PDF. I will post to the list when it works. I also have more 8/I stuff not yet scanned if you need something in particular. I have put a no longer accurate list of manuals I have at http://www.pdp8.net/document.txt I also have spare boards if you find you need them. I normally try to trade for something (extra hardware/docs or copies). A lot of paper tape images are available on the net. With the right adapters you can hook it up to a PC to download. I have done this with my 8/I. See http://pdp-8.org/papertape/. You should also be able to punch physical copies with your punch and a little software. If you have TC01 with a TU55 or TU56 I have 4K disk monitor system which says it works off of a DECtape also. I only ran it from DF32's. The manual is already scanned, I will get the tape on my site and send to pdp-8.org. Email me if you can't find it when you need it. David Gesswein http://www.pdp8.net/ -- Old computers with blinkenlights

26 years

1
0
0 0

PDP 8/I stuff

by ethan_dicks＠yahoo.com

--- Mike Cruse <mcruse(a)acm.org> wrote: > Anybody else out there with an 8/i? > > Mike I've had an -8/i since high school. I rescued it from a public school locally (I already had an -8/L, so I knew what I was looking at). Mine came with 4K, a DF-32 master and two slave disks. I have no expectations that the media are any good at this point, but the last time I fired it up, the controller was working enough that I could read the status register and watch the rotation sensor on the console via a tiny toggle-in program I wrote to check it (I had to rebuild the rotation sensor on one drive because it caught fire in the housing!) There are some docs on Highgate and you might be able to find the DEC 1970 Small Computer Handbook for the basics. If you care to try out any papertape or DECtape programming systems, you'll want the Programming Handbooks. There's good info in those on how to load and start FOCAL, etc. Have fun with it; I wish I had reasonable peripherals on mine. The best I can do is move my PC8 to it and load paper tapes faster. I have a TD8E and a TU56, but nothing for an older machine. I suppose I could always wrap one up - I do have enough spare parts, just not enough spare time. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Get Yahoo! Mail – Free email you can access from anywhere! http://mail.yahoo.com/

26 years

1
0
0 0

origin of gates quote on 640k memory...

by allisonp＠world.std.com

From: Eric Smith <eric(a)brouhaha.com> >> I suppose it was possible that IBM chose the Boca Raton project >> over some other (unknown to me) 8080-based project due to the >> requirement you mention. But I don't think they retargeted their >> design from 8080 => 8088. > >The IBM System/23 Datamaster was already in production and was based >on the 8085. There are some similarities in the design, suggesting >that the Boca Raton folks were at least partially inspired by it. Exactly, Anyone with 8085 experience could easily loft the design to an 8088. Intel even had an ap-note to put an 8088 in an SDK-85 board (I did it too) and it was pretty easy with the big difference being the monitor rom. Keep in mind the design window was in 1980 and by then the 8080 was a non contender as the 8085 and Z80 had replaced it. If you look at the late '79 and early 1980 mags (Byte, KB, IA etal) you would see there was an emerging push for more cpu, more bits to do math and more bits for addressing. If they used an 8085 (or z80) they were an also ran to tandy, Apple softcard, NS and a raft or other already known 8bit systems. The only place there was room to make a point was the 16bit front and the 8088 was a well known (it had been around for about two years) relatively cheap way to get there. Allison

26 years

2
2
0 0

VCF Link Library Improved!

by vcf＠siconic.com

In my continuing quest to make the VCF Link Library ever more useful, I've split up sections into sub-sections where applicable. For instance, the DEC section is now split into PDP-8, PDP-11, VAX, etc. The Apple section is split into Apple ][, Macintosh, Lisa, etc. You get the idea. Also, specialty sites for each section have been split out, such as Software (for sites that have software resources for computers in that section), Documentation, Emulators, etc. Check it out at: http://www.vintage.org/cgi-bin/links.pl There are currently over 700 links total in the database! If your site is not listed, add it now! http://www.vintage.org/addlink.html Sellam International Man of Intrigue and Danger ------------------------------------------------------------------------------- Looking for a six in a pile of nines... VCF 4.0 is September 30-October 1 San Jose Convention Center, San Jose, California See http://www.vintage.org for details!

26 years

5
5
0 0

VCF Link Library Improved!

by pete＠dunnington.u-net.com

On Jul 12, 8:08, Sellam Ismail wrote: > On Wed, 12 Jul 2000, Zane H. Healy wrote: > > I think you've got some sort of problem... On Netscape 4.72/Mac the page > > shows up as gibberish, but when you scroll down far enough you see the real > > page... The wierd thing is the info all appears to be in the gibberish, > > then in the real page. > > Not that this helps your situation, but I checked it with NS 4.7 under > Win98 and it worked OK on my end. > Anyone else having problems? FWIW, it looks fine to me, using Netscape Communicator 4.07/SGI/IRIX 5.3 -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years

1
0
0 0

Z80 Starter kit plus ...

by ncherry＠home.net

I have a Z80 starter kit which I've torn apart and reassembled. This one is rather nice in that it came with a power supply, connectors and a wire wrapped section already added. It was probably used at a local community college (Mercer?). The wire wrap job is very pretty (hey it's art work :-). I also picked up an Applied Microsystems Corp. EM-180B (Z80 diagnostics emulator). Soes anyone have any docs on any of this? I've had experience with the emulator (I worked with the 6802 and 6809 emulators). So I've been able to use it, I just want to know what the rest of the bells and whistles do. Thanks -- Linux Home Automation Neil Cherry ncherry(a)home.net http://members.home.net/ncherry (Text only) http://meltingpot.fortunecity.com/lightsey/52 (Graphics) http://linuxha.sourceforge.net/ (SourceForge)

26 years

1
0
0 0

HP 85 stuff

by rigdonj＠intellistar.net

At 06:19 PM 7/10/00 -0400, Carlos wrote: > > By the way, this weekend >my I/O ROM started to go flaky; on power up, it reports an error 112, >which is a checksum failure. I remember that this happened before and >reseating fixed it, but I haven't had luck this time. I tried other >slots in the ROM drawer too. Guess I need to pry open the ROM capsule >and have a look. This is weird, because both the pin and the through-hole >that make the contacts are gold-plated; they were made to last. I am >afraid that this is a case of bit rot :-( . > > Carlos, Keep me posted about what you find. I've only seen bit rot in the HP 41 plus in ROMs. I've never seen it in other HP machines. Joe

26 years

7
11
0 0

Repairing PDD

by zmerch＠30below.com

I run a Tandy Model 100/102/200 mailing list (the NEC, Olivetti & other Kyocera-OEM'd laptops are also very welcome there! ;-) and this person posed a question about repairing her Portable Disk Drive. Can anyone here help her? You can reply directly to the poster, or you can reply to the mailing list (m100(a)list.30below.com) as it's an open list - you need not be subscribed to post to it. Thanks a lot! Roger "Merch" Merchberger >Mailing-List: contact m100-help(a)list.30below.com; run by ezmlm >List-Unsubscribe: <m100-unsubscribe(a)list.30below.com> >List-Subscribe: <m100-subscribe(a)list.30below.com> >Reply-To: m100(a)list.30below.com >Subject: Repairing PDD >From: Manz(a)online.life.de (Marianne Manz) >Date: Mon, 10 Jul 2000 09:27:35 +0200 > >Hello! >I'm new here, gut I have to start with a problem right away. > >After not having used my PDD for about three years, I wanted to use it >again the other day. But it didn't work. After unscrewing it, I >discovered, that the fuse was burst. After removing it, it still didn't >work, because the disk wouldn't rotate properly. I managed to find that >little wheel on the back of the motor and turned it round a bit. After >that, the PDD worked properly for a minute or so, then the fuse burst >again. >Can anybody help me to get that motor working properly again? I fear, >that I may damage something, if I go on like I did. Is there any >instruction, how to disassamble that device and to put it together again >without doing any harm? >Bye, Marianne > > -- Roger "Merch" Merchberger --- sysadmin, Iceberg Computers Recycling is good, right??? Ok, so I'll recycle an old .sig. If at first you don't succeed, nuclear warhead disarmament should *not* be your first career choice.

26 years

1
0
0 0

Tektronix terminal available

by mike＠delos.rain.com

I looked but didn't see a model number in any obvious place. I bought it a long time ago because I was fascinated by the Tektronix displays used in the "Battlestar Galactica" TV show. Unfortunately I never got my hands on the documentation for the graphics display commands. I would have loved to get copies of the programs they used for the show (even now that might persuade me to keep this terminal). The terminal itself isn't very large, but it does have an integrated floor stand and is rather heavy (shipping might not be very practical). I live in the Portland Oregon area; if you're within reasonable driving distance. I wasn't planning to ask for money, but I do have a wish list that includes a Kaypro, Osborne, Zorba, or some other interesting portable CP/M computer. If you're interested, feel free to contact me (even if you don't have anything to trade). I'm trying to free up some space to make my wife happy... ----------------------------------------------------- Mike Newman INTERNET: mike(a)delos.rain.com Aloha, Oregon USA -or- mike.w.newman(a)gte.net http://home1.gte.net/res003ki/index.htm ----------------------------------------------------- High-resolution - If you stand more than four meters away, you can't see the dots.

26 years

1
0
0 0

OT: Tektronix 531 oscilloscope available

by mike＠delos.rain.com

Includes "Scope-Mobile" cart, some plug-in modules, and even a few spare parts. It worked when I got it but developed what I believed was a high voltage power supply problem that I never got around to repairing. Now I need the room more than the 'scope, so I'd like to find someone who can use it. Shipping is probably not too practical because of the size and weight, but if you live within reasonable driving distance of the Portland Oregon area and are able to come and get it, contact me for directions... ----------------------------------------------------- Mike Newman INTERNET: mike(a)delos.rain.com Aloha, Oregon USA -or- mike.w.newman(a)gte.net http://home1.gte.net/res003ki/index.htm ----------------------------------------------------- Velleity (vuh-LEE-ity), n. A mere wish, unaccompanied by an effort to obtain it.

26 years

1
0
0 0

Solace: Sol Anachronistic Computer Emulation

by frustum＠pacbell.net

Like the subject line says -- I've written an emulator for the Sol computer. It is a Win32 application and should run fine on any pentium-class machine. It currently doesn't support any disk drives, the cassette port, the serial or parallel ports. Still, you can do a surprising number of things, especially since you can "download" programs via a menu (much faster than the cassette interface!) Yes, you can run TARG, although I haven't yet tried placing an AM radio next to my computer to listen for the sound effects. :-) Solace is a work in progress, but it has already seen a fair amount of beta testing, including some by the list's own Bob Stek (Saver of Lost Sols). The emulator is quite simple to run, and it doesn't require any nasty installation procedures, modifications of the registry, etc. Just unzip it and run. If you are interested, go check it out (including a screen shot) here: http://www.thebattles.net/sol20/solace.html If you get tired of the programs that come with the ZIP file, download some more from the Sol archive: http://www.thebattles.net/sol20/solpgms.html And as long as I'm here, if you have any Sol docs or programs that you could share with the Sol archive, let me know about it. Thanks. ----- Jim Battle == frustum(a)pacbell.net

26 years

1
0
0 0

Two Epson QX-10s free to good home

by donm＠cts.com

(Hopefully I got it right this time!) I received the following e-mails offering two QX-10s to (a) good home(s). Please respond directly to their sender if of interest to you, though I am willing to play a minor intermediary role if that seems productive. - don ====================================================

26 years

1
0
0 0

Abandonware Petition

by whdawson＠mlynk.com

This is something worthwhile to support. Petition is at: http://mivox.com/essays/index.html Bill Dawson <mailto:whdawson*at*mlynk.com> <- Anti-spam protection ? Your computer will do far more than you ever expected it to, and that won't be enough. Pournelle's First Law

26 years

1
0
0 0

Need Freon TF Substitute for Head Cleaning

by xds_sigma7＠hotmail.com

Interestingly enough, my "IBM Tape Unit Cleaner" (the real offical stuff!) says it contains Trichlorotrifluoroethane AND isopropyl alcohol. This is stuff that I use on an 8809 drive, which is a top-loading, lift-the-cover sort of a drive, much like a CDC (nee DEC) TU80... if it works for IBM, I wouldn't be too concerned. Will J ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

26 years

5
6
0 0

HP part number cross reference?

by eric＠brouhaha.com

Does anyone know of an online HP part number cross reference? I'm almost postive that I've seen one somewhere, but I can't find it now. I need to find the industry equivalents of the parts listed below. The 1810 prefix parts are probably just resistor packs (although the 16-pin ones could be RC networks or the like), the 1820 prefix parts are probably all 4000-series CMOS, and I'm guessing that the 1858 prefix part is an analog circuit. The T-28751 has a Motorola logo, but no other part number, not even an HP 4x4. I've occasionally seen other T-prefix parts in HP gear, but they seem fairly rare, and I'm not sure what the T signifies. I've tried HP PartSurfer, but it only listed one of the parts and didn't give any detail other than "MOS": http://outfield.external.hp.com/spi/ Thanks! Eric part # pins --------- ---- 1810-0252 9 SIP 1810-0316 16 1810-0319 16 1820-0927 16 1820-0936 14 1820-0938 16 1820-0939 14 1820-0941 16 1820-0946 14 1820-0949 14 1820-0970 16 1820-1114 16 1820-1145 16 1820-1241 16 1820-1408 14 1820-1466 16 1820-1485 16 1820-1514 16 1820-1578 16 1820-1665 16 1820-2037 14 1820-2080 16 1858-0038 14 T-28751 16

26 years

3
2
0 0

Need Freon TF Substitute for Head Cleaning

by fmc＠reanimators.org

CLASSICCMP(a)trailing-edge.com wrote: > There *are* some parts on tape drives that aren't supposed to be > cleaned with alcohol. Some rollers and vacuum column sensors fall > into this category. Maybe some vacuum columns too. HP OEM'd an STC drive (to get a 6250bpi drive to market in a hurry) and called it the HP7976. The HP CE-supplied rumor back in the day was that alcohol would loosen the glue that held all those tiny glass beads to the walls of the vacuum columns! -Frank McConnell

26 years

2
1
0 0

origin of gates quote on 640k memory...

by allisonp＠world.std.com

From: Neil Morrison <morrison(a)t-iii.com> >FWIW, I believe his opinion was that 128K was enough. My recollection is >that he wanted that amount to run Multiplan, and that is why he talked >IBM into using the 8088 instead of the intended 8080 for the IBM PC. >I believe this because Radio Shack sold add on cards for various Z80 >boxes they made so as to provide 128K for Multiplan (mainly). Thats so far out left field that I can say there is little basis for it. RS was not a significant vendor for memory cards or extensions. As to the choice of 8088 vs 8080, nobrainer. Everyone knew by 1980 that while the z80 was a great cpu there were an emerging class of apps that really needed 16 (or more) bit wide ALUs and memory to perform well. Graphics was one of the emerging apps and the other was programs like multiplan (math intensive). These and others were the push for the 16bit world. Additionally 8080 was quite passe` by 1980, 8085 maybe as it was available as a 5mhz part (vs 8080 at 3!) and Z80 at 4mhz. There was also Z8000 and other promised parts for the 16bit world to come. I suspect 8088 won as it was quite easy to interface and use. Another point, Multiplan ran under CP/M with 48-60k of available memory and most 8080 class (include z80) didn't have a MMU to manage more nor did the OS (CPM2) have management. I have several systems that still run multiplan (8080 and z80), they used overlays and on disk storage very intensly to get around memory shortfalls. Additionally PC even early on were rift with code bloat (8080 lofted code tended to expand) and it was deemed a requirement to have more than 64k mostly due to the OS eating most of it. At the time 256k was enough and it was felt (just like a few years before when z80 64k was plenty) that was enough and if not 640k would insure enough space. This is true also due to the segmented addressing the 8088 used, it was still largely a 8/16bit cpu with 16bit basic addressing. Apps didn't grow well until the 286 memory style and more aptly the 32bit 386 appeared. An aside, non PC 8088/86 systems used to permit a full 1 MB of ram via rom shadowing or added a mmu to extend beyond 1mb. So Billy boy was really refering to those system that were promoting the full 1mb or larger memory maps. Allison

26 years

1
0
0 0

Two Epson QX-10s free to good home

by donm＠cts.com

I received the following e-mails offering two QX-10s to (a) good home(s). Please respond directly to their sender if of interest to you, though I am willing to play a minor intermediary role if that seems productive. - don ====================================================

26 years

1
0
0 0

Need Freon TF Substitute for Head Cleaning

by pete＠dunnington.u-net.com

On Jul 11, 10:19, CLASSICCMP(a)trailing-edge.com wrote: > Stupid chemistry question from someone who took too many physics classes > and not enough chemistry: > > What's the difference between trichlorotrifluoroethane and > 1,1,2-trichloro-1,2,2,trifluoroethane? Are they different names > for the same stuff, or two different stuffs? Just the positions of the various halogen atoms relative to each other. The 1,1,2 form specifies a particular arrangement, the other is non-specific. Schematically, this is 1,1,2-trichloro-1,2,2,trifluoroethane: Cl F | | F--C---C--Cl | | Cl F In other words each carbon atom has one halogen of one type and two of the other. There's one other possible arrangement[1]; where all the chlorine is on one carbon, and all the fluorine is on another, which would be 1,1,1-trichloro-2,2,2-trifluoroethane. I've no idea if that makes any significant difference to any of the properties you and I would be interested in, but I suspect not, and that most trichlorotrifluoroethane is a mixture of the two. [1] From my 2-D ASCII art, you might think there are other arrangements, eg swapping the position of the fluorine for one of the chlorines on the first carbon atom. However, if you think 3-D, and imagine the carbon as one apex of a triangular pyramid (meeting the second carbon at the apex of another pyramid) and also realise that the carbons can rotate relative to each other, you'll see that all the other permutations are equivalent. BTW, this is iso-propyl alcohol: H / H O H | | | H--C---C---C--H | | | H H H You could also call it 2-hydroxy-propane, or propan-2-ol. The O-H group is what makes it water miscible (in fact, it's mildly hygroscopic), and of course it's also highly flammable, unlike the chloroflurocarbons. To get ordinary ethyl alcohol, chop off one of the carbons and two corresponding hydrogens. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years

2
1
0 0

Two Epsom QX-10 free to good home

by ASquires＠idecpharm.com

Hi Don I am not averse to shipping them, but I would not wish to incur the cost of boxing and shipping (although I do have the shipping box for one cpu). So, letting someone pick them up here in San Diego would be easiest for me (I live in Bonita). Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121

26 years

1
0
0 0

Two Epsom QX-10 free to good home

by ASquires＠idecpharm.com

Hi Don I am not averse to shipping them, but I would not wish to incur the cost of boxing and shipping (although I do have the shipping box for one cpu). So, letting someone pick them up here in San Diego would be easiest for me (I live in Bonita). Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121

26 years

1
0
0 0

Two Epsom QX-10 free to good home

by ASquires＠idecpharm.com

Hi Don I am not averse to shipping them, but I would not wish to incur the cost of boxing and shipping (although I do have the shipping box for one cpu). So, letting someone pick them up here in San Diego would be easiest for me (I live in Bonita). Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121

26 years

1
0
0 0

Cubix System... Anyone know the pinout of the Video/Keyboard/ Mous e Connector?

by RCini＠congressfinancial.com

Al: I had this issue on a Cubix 486-based SBC that I'm using for a firewall. I wound-up ordering the breakout cable from Cubix for $35. It is a small PCB on an ISA bracket and it has a video connector, mouse, and keyboard connector. It appears that there are coils or something on the board, probably for noise rejection and the like. Cubix was fairly helpful, giving me the part number to use when I called the parts line to order it. Rich -----Original Message----- From: Corda Albert J DLVA [mailto:CordaAJ@nswc.navy.mil] Sent: Tuesday, July 11, 2000 6:12 PM To: 'classiccmp(a)classiccmp.org' Subject: Cubix System... Anyone know the pinout of the Video/Keyboard/Mous e Connector? Hi Guys! I just came across a Cubix ERS FTII System... I realize that this may not fit under the "10-year" rule, but it is a rather unique system, and I'd like to try to get it going (possibly with NetBSD or Linux). The Cubix site has most if the Info I need, but apparently this system used a single DB25 connector/cable to route the video, keyboard and mouse signals to a small breakout box (which I don't have, and the Cubix site doesn't document) Does anyone happen to know what the pinout of that connector is? Also, if anyone has any experience with setting linux up on this critter, I'd love to know about it. The current configuration of the box is: 3 BC5055 60 Mhz Pentium processors 1 BC3035 (486?) -Thanks in advance... -al- -acorda(a)geocities.com

26 years

1
0
0 0

origin of gates quote on 640k memory...

by dhquebbeman＠theestopinalgroup.com

> FWIW, I believe his opinion was that 128K was enough. My recollection is > that he wanted that amount to run Multiplan, and that is why he talked IBM > into using the 8088 instead of the intended 8080 for the IBM PC. > I believe this because Radio Shack sold add on cards for various Z80 boxes > they made so as to provide 128K for Multiplan (mainly). An article in Byte magazine years ago on the development of the IBM PC said that IBM took an unsanctioned R&D project being worked on by a couple of guys in Boca Raton and it, with all its shortcomings, became the IBM PC. But the engineers deliberately chose the 8088 for its ease of interfacing (8-bit) over the 8086, which required more support logic. I suppose it was possible that IBM chose the Boca Raton project over some other (unknown to me) 8080-based project due to the requirement you mention. But I don't think they retargeted their design from 8080 => 8088. regards, -doug q

26 years

2
1
0 0

Cubix System... Anyone know the pinout of the Video/Keyboard/Mous e Connector?

by CordaAJ＠nswc.navy.mil

Hi Guys! I just came across a Cubix ERS FTII System... I realize that this may not fit under the "10-year" rule, but it is a rather unique system, and I'd like to try to get it going (possibly with NetBSD or Linux). The Cubix site has most if the Info I need, but apparently this system used a single DB25 connector/cable to route the video, keyboard and mouse signals to a small breakout box (which I don't have, and the Cubix site doesn't document) Does anyone happen to know what the pinout of that connector is? Also, if anyone has any experience with setting linux up on this critter, I'd love to know about it. The current configuration of the box is: 3 BC5055 60 Mhz Pentium processors 1 BC3035 (486?) -Thanks in advance... -al- -acorda(a)geocities.com

26 years

1
0
0 0

origin of gates quote on 640k memory...

by morrison＠t-iii.com

FWIW, I believe his opinion was that 128K was enough. My recollection is that he wanted that amount to run Multiplan, and that is why he talked IBM into using the 8088 instead of the intended 8080 for the IBM PC. I believe this because Radio Shack sold add on cards for various Z80 boxes they made so as to provide 128K for Multiplan (mainly). Neil Morrison morrison(a)t-iii.com "If Bill Gates had a nickel for every time Windows crashed.... Oh, wait, he does!"

26 years

1
0
0 0

Need U.S. source for belt for Amstrad PCW8256 3" drive

by whdawson＠mlynk.com

Hello all, Here's the dimensions of the needed belt: 72mm x 3mm x 0.5mm also acceptable: 71.0mm x 2.8mm x 0.6mm or 69-72mm x 3-4mm x 0.5-0.6mm The rest of the story: I picked up an Amstrad PCW8256 today complete with printer, original disks (LocaScript and CP/M Plus), 2 game disks with instructions, 5 spare disks with LocaScript files from the previous owner, the Start Up Guide and the User Guide. All for $10.00. It is in great condition and appears to have had little use. However, this is the first Amstrad I've ever owned (or seen for that matter), and also my first experience with these strange 3" floppy disks and drive. I was told it worked, but upon getting it home I found it wouldn't boot. After some poking around I decided to take the floppy drive out and check for head movement. This is when I discovered that the floppy only spun when I pulled up on the pressure pad. At this time it started seeking, so seeing that the spindle is belt driven, I knew where the problem was. I removed enough screws and connectors to get to the old belt out and replaced it with an appropriately sized rubber band. After reassembly, everything now works great. It boots LocaScript, CP/M, and runs the games. But..... I'd like to replace the rubber band with real belt. Can anyone help? Bill Dawson whdawson(a)mlynk.com <mailto:whdawson@mlynk.com> ? Your computer will do far more than you ever expected it to, and that won't be enough. Pournelle's First Law

26 years

4
6
0 0

Need Freon TF Substitute for Head Cleaning

by CLASSICCMP＠trailing-edge.com

>The Cipher manual calls for using Freon TF as the head- >cleaning solution. IIRC, this is a banned substance. I >looked through the Allied Electronics catalog, and they >don't carry any products that contain it. It may be banned for manufacture and sale to "consumers", but existing stock does exist (at a hefty price) at many local electronics stores. >The manual specifically states I'll get read errors if >I use anything containing alcohol. I've been cleaning heads for decades using reagent-grade isopropyl alcohol. Be wary of the "rubbing alcohol" you get at a local drugstore - the 80% or 93% stuff may very well contain some oils. >What cleaning substance can be safely used as a substitute >for Freon TF? There *are* some parts on tape drives that aren't supposed to be cleaned with alcohol. Some rollers and vacuum column sensors fall into this category. (Actually some of the vacuum column sensors aren't supposed to be cleaned with anything ever...) Tim.

26 years

3
2
0 0

IBM System/1

by lemay＠cs.umn.edu

What is an IBM system/1 ? There is quite the pile of manuals for a IBM System/1 sitting in the hallway. My main interest is in all those nice looking IBM folders, most of which are the type that can hold large greenbar paper, ie, paper with that sort of tractor feed hole pattern. dark navy with IBM in white, with navy lines interruping the graphic, you know, standard old fashioned IBM logo... -Lawrence LeMay

26 years

10
13
0 0

Need Freon TF Substitute for Head Cleaning

by dhquebbeman＠theestopinalgroup.com

Hello again, The Cipher manual calls for using Freon TF as the head- cleaning solution. IIRC, this is a banned substance. I looked through the Allied Electronics catalog, and they don't carry any products that contain it. The manual specifically states I'll get read errors if I use anything containing alcohol. What cleaning substance can be safely used as a substitute for Freon TF? tia, -doug q

26 years

2
1
0 0

Need Freon TF Substitute for Head Cleaning

by CLASSICCMP＠trailing-edge.com

>Interestingly enough, my "IBM Tape Unit Cleaner" (the real offical stuff!) >says it contains Trichlorotrifluoroethane AND isopropyl alcohol. This is >stuff that I use on an 8809 drive, which is a top-loading, lift-the-cover >sort of a drive, much like a CDC (nee DEC) TU80... if it works for IBM, I >wouldn't be too concerned. Stupid chemistry question from someone who took too many physics classes and not enough chemistry: What's the difference between trichlorotrifluoroethane and 1,1,2-trichloro-1,2,2,trifluoroethane? Are they different names for the same stuff, or two different stuffs? I have some of the 1,1,2-trichloro-1,2,2,trifluoroethane stuff (in the form of Kodak film cleaner) and it has (from experience) different chemical properties than alcohol. Isopropyl alcohol seems to loosen up laquer-based paints; the 1,1,2-trichloro-1,2,2,trifluoroethane doesn't seem to touch paint at all. So the difference may be important if you're cleaning an assembly held together with a laquer-based adhesive. Tim.

26 years

2
1
0 0

Unknown type of Data General Terminal in Kansas City

by mmcfadden＠cmh.edu

I just came across a Data General Terminal which is off-white colored about 12" diagonal and says model 6283 on the back. It has two dip switch packs on the back of it to set the baud rate. Very round appearance with an integrated base. Anybody know any more about these terminals? I did altavista and google searches without success. mike mmcfadden(a)cmh.edu

26 years

1
0
0 0

Reading Old 9-Track Tapes (RE: Pertec Interface Cable Fun)

by dhquebbeman＠theestopinalgroup.com

Good Morning all, Thanks to all who replied to my post re: the Pertec cables. The drive is operational, and I was able to restore files >from my MAGSAV-formatted tapes. Some interesting data points: the two tapes from which I recovered data had sat mostly unused since 1983. One of them I'd handed to a friend in 1988 who was working on a Prime system, for the express purpose of getting everything on disk again and then copying it to floppy disks. I never did figure out if we miscommunicated or if it was unfeasible to do so, but all I got was paper listings... but I digress. These ancient tapes had not been well-taken-care of the last few years. In fact, they were in the basement, a basement which flooded perhaps 6 times since 1996, and they had not only been under water, but had lots of nasty growth on them (mold &/or mildew). In spite of this, I was able to read all but (I think) one or two files from the source tree I'd been hanging on to. The other tape had my custom Primos command environment, Donald Slutz's custom command environment (with QED!), and my Prime-ports of Intel's MAC80, INTERP80, and PLM80. These were the items I most of all wanted from the tape. Now, the tape also (IIRC) held lots of 8080 source code that appears to be unreadable. Fortunately, I have copies of all those files on a 9-track CDC-formatted tape (actually I think it's an ANSI labeled tape, but all the files are in CDC BCD). At any rate, while I may have to write a Fortran program to read the CDC tape, I most likely can get those files. They are, however, older tapes, dating from around 1980 (I also have two 7-track tapes from about 1978). Also, I have a trick or two yet to try on the nasty Prime tape before I give up. The upshot of all this is that, if you stored the tape in a reasonable fashion (i.e. not underwater) and didn't use high density (mine were 800bpi and 1600bpi), your tapes should still be readable. It helps, of course, that this Cipher streamer was under service contract until last Dec, so YMMV. This post brings me to another question, but I'll post it separately. -doug q

26 years

2
1
0 0

Tim Shoppa Personal Note: FW: Pertec Interface Fun (Was: RE: HP 9 7548D Hard Drives)

by dhquebbeman＠theestopinalgroup.com

Tim- Thanks for peace-of-mind re the Pertec. I was hoping to hear back from you about mode-page editing... if you've got a pointer to a good resource on the subject, no need for you to play teacher to my student... regards, -doug quebbeman P.S. Tim- is there a way for me to send mail directly to you? The stuff I'm sending to CLASSICCMP(a)trailing-edge.com is going un-answered. > -----Original Message----- > From: Douglas Quebbeman > Sent: Wednesday, July 05, 2000 8:48 AM > To: 'CLASSICCMP(a)trailing-edge.com' > Subject: RE: HP 97548D Hard Drives > > > > >Subj: HP 97548D Hard Drives > > >I'm looking for a small number (two or three) of these drives; > > >they're 5 1/4 inch full-height differential SCSI drives; they > > >tend to be found in Sun boxen. > > > > > >Anybody have any they'd be willing to part with via sale/trade? > > > > Do you need these exact HP drives? If it's a capacity issue, there's > > a very valuable technique called "mode page editing" that will let > > you adjust drive capacities downward so that you can use large-capacity > > recent-manufacture SCSI drives in place of older low-capacity SCSI > > drives. It's a very valuable technique when the hardware or OS don't > > support large-capacity drives, a very common situation with > > older hardware. > > Tell me more... I've actually been trying to do exactly that, substituting > a Seagate 11200ND, but the unit I'm trying may have a badspot in one of > the low sectors. > > Additionally, I need a sector size of 2080 bytes; that's for a 2048-byte > Primos record plus 32 bytes of system overhead. The controller claims > to be able to do this by combining 5 sectors of the usual 512-bytes each > into each Primos sector. This is using a 1st Solutions 7110DX controller. > > The controller is able to do low-level formatting; you set the # of heads > and the # of sectors-per-track on DIP switches; then you set one switch on > (FMT EN) and issue a Primos command to add the drive; the controller than > initiates the format. I get an error code on a set of LEDs on the controller > pretty quickly, and it corresponds to one I see Primos issue sometimes. > > So my failure to get this to work currently, may be due to a bad drive. > I've got another 11200ND on the way, so I can compare results. > > -doug q >

26 years

1
0
0 0

Intel i960 evaluation board

by allisonp＠world.std.com

>i960, or i860? I wasn't aware that any i960 Unix boxes had been shipped. > >The i960 family was the stripped-down commercial version of the ill-fated >Gemini (P7) 33-bit (not a typo!) processor, a collaboration between Intel >and Siemens. The two companies created a workstation company called BiiN >to sell the workstations, and although they shipped some prerelease >machines, AFAIK they never offered any for sale. It also grew from the 8089 (20 bit) and the 8751(8bit) for embedded processing tasks like engine controls. Allison

26 years

12
20
0 0

Pertec Interface Cable Fun

by dhquebbeman＠theestopinalgroup.com

Help! I just received the controller to hook my Cipher streamer up to my Prime. Usually, there are little colored stick-on dots affixed to the edge connectors and the corresponding cable connectors for easy matching. Not this time. I've briefly looked at the Pertect pinout as per a short document on John Wilson's web site. However, I didn't study it enough to have a feel for what happens if the cables are hooked up backwards (ie simple non-function versus a smoke-releasing exercise). Does anyone know what happens under these conditions? tia, -doug q

26 years

3
2
0 0

HP 85 stuff

by cem14＠cornell.edu

"Tony Duell " wrote: > > A word of caution: the 16K RAM module intended for the HP85A can > > damage the HP85B. This is clearly stated in one of the manuals. > > Interesting... Do you happen to know what damage it actually does? I > assume a bus contention between the controller in the RAM drawer and one > of the memory controllers in the 85B. > -tony No, I don't know what it is that happens. By the way, this weekend my I/O ROM started to go flaky; on power up, it reports an error 112, which is a checksum failure. I remember that this happened before and reseating fixed it, but I haven't had luck this time. I tried other slots in the ROM drawer too. Guess I need to pry open the ROM capsule and have a look. This is weird, because both the pin and the through-hole that make the contacts are gold-plated; they were made to last. I am afraid that this is a case of bit rot :-( . carlos. -- Carlos Murillo-Sanchez email: cem14(a)cornell.edu 428 Phillips Hall, Electrical Engineering Department Cornell University, Ithaca, NY 14853

26 years

1
0
0 0

Price of our hobby

by xds_sigma7＠hotmail.com

Well I can't be silent on this one... I'm broke as all hell, but I don't care.. I should probably be in college right now but I'd rather spend 3K to get a bunch of Interdata's and Perkin-Elmers... my other car is taken apart and I ought to spend money on fixing it but I don't.. Sure, maybe these aren't "good" choices, but whats important is that they ARE choices, I CHOSE to spend my money in such a way, and I live with it. But I work, I pay my bills, and hey, I could easily go to college if I'd get off my ass and work at it.. If you want to just to sit around and bitch about how poor you are, go for it, you won't get my sympathy. I know its entirely in my own power to determine how much money I have/make, so I don't complain.. If you're complaining, you probably don't understand that.. Besides, you could have loads of money if you spent the time you spend bitching working instead... Just my 2K worth... Will J ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

26 years

31
72
0 0

Two Epsom QX-10 free to good home

by ASquires＠idecpharm.com

I would be happy to give these machines and video monitors to anyone who want them (one was refurbished by Star Technology in Colorado; "newer" software too). Would you know of someone who might be interested? Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121

26 years

1
0
0 0

Two Epsom QX-10 free to good home

by ASquires＠idecpharm.com

I would be happy to give these machines and video monitors to anyone who want them (one was refurbished by Star Technology in Colorado; "newer" software too). Would you know of someone who might be interested? Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121 >From ASquires(a)idecpharm.com Tue Jul 11 16:12:31 2000 Date: Tue, 11 Jul 2000 15:44:34 -0700 From: ASquires(a)idecpharm.com To: Don Maslin <donm(a)cts.com> Subject: Re: Two Epsom QX-10 free to good home Hi Don I am not averse to shipping them, but I would not wish to incur the cost of boxing and shipping (although I do have the shipping box for one cpu). So, letting someone pick them up here in San Diego would be easiest for me (I live in Bonita). Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121

26 years

1
0
0 0

Two Epsom QX-10 free to good home

by ASquires＠idecpharm.com

I would be happy to give these machines and video monitors to anyone who want them (one was refurbished by Star Technology in Colorado; "newer" software too). Would you know of someone who might be interested? Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121 >From ASquires(a)idecpharm.com Tue Jul 11 16:12:31 2000 Date: Tue, 11 Jul 2000 15:44:34 -0700 From: ASquires(a)idecpharm.com To: Don Maslin <donm(a)cts.com> Subject: Re: Two Epsom QX-10 free to good home Hi Don I am not averse to shipping them, but I would not wish to incur the cost of boxing and shipping (although I do have the shipping box for one cpu). So, letting someone pick them up here in San Diego would be easiest for me (I live in Bonita). Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121

26 years

1
0
0 0

Two Epsom QX-10 free to good home

by ASquires＠idecpharm.com

I would be happy to give these machines and video monitors to anyone who want them (one was refurbished by Star Technology in Colorado; "newer" software too). Would you know of someone who might be interested? Aimee M. Squires, MPH, RN Clinical Communications IDEC Pharmaceuticals 3030 Callan Road San Diego, CA 92121

26 years

1
0
0 0

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb