RE: Comtec model P135-20/35 Paper Tape Punch
> On 04/30/2022 2:09 PM amp1...@gmail.com wrote: > > > Hi Will, > > Is the punch you received capable of punching 8-level tape? While the PDF on > Surplus Sales of Nebraska's site says the unit can punch 5- to 8-level tape, > one of the photos on the site, > https://www.surplussales.com/Images/Equipment/Military/eqp-p135-20-35_2_lg.jpg, > makes it look like it can only punch up to 6-level tape. > > -- Ron > It appears that it can only punch 6 (or 5?) level tape the way it is configured. The manual isn't very clear on it, specifying repeatedly that it can punch 5 to 8 level tape. But the one I got only has 6 holes as in the picture. In the back of the manual the parts list specifies different "guide and die blocks." I haven't hooked mine up yet -- I need a 5 amp, 27 V supply. But it appears it has everything except the die block to work with 8 level. I doubt the local electronic supply house will have that die block, so I might modify that one if possible. Will
Comtec model P135-20/35 Paper Tape Punch
A month or two ago, someone mentioned this paper tape punch available from Surplus Sales of Nebraska. https://www.surplussales.com//Equipment/mil.html I think someone had a similar model and was looking for information. I ordered one on Tuesday or Wednesday and got it today. It came with the complete operation and maintenance manual as opposed to the three or so scanned pages they have on the website. I will be scanning that manual and making it available as soon as possible. In the mean time, if anyone has questions that the manual may have answers to, let me know. Will
Re: TRS-80 Question
> On 04/12/2022 2:11 PM Yeechang Lee via cctech wrote: > > > Eric Dittman says: > > There's a 2K hole in the Model I memory map above the ROM > Is this the hole that causes stock Model I to not run CP/M? > The ROM at address 0 is the bigger issue. CP/M requires RAM starting at address 0.
Re: Retro networking / WAN communities
> On 04/12/2022 12:42 PM Wayne S via cctech wrote: > > > Thanks for the info about IMP. > But now i’d have to question IMP routers being around in 1970 since the > internet wasn’t around yet. > > The first response of "Interface" Message Processor is more correct. There was a LOT of networking before what we call the "Internet" now. It derived from the Arpanet in the 60s, which is where the IMPs were used. https://en.wikipedia.org/wiki/ARPANET#:~:text=The%20Advanced%20Research%20Projects%20Agency,technical%20foundation%20of%20the%20Internet. Will
Re: Possibly going up to VCF, stuff I would like to sell/get to proper people pdp8/12/HP stuff
2020: oops Here: https://tcf-nj.org/wp-content/uploads/2022/03/TCF2022-SCHEDULE-TALK-INFO-PIXs.pdf > On 04/11/2022 8:48 AM Will Cooke via cctech wrote: > > > > On 04/11/2022 7:43 AM Chris Zach via cctech wrote: > > > > > > On 4/10/2022 6:05 PM, Ethan Dicks wrote: > > > Totally unrelated event. > > Ok. Does TCF still happen? > > > > > > It appears so: > https://tcf-nj.org/program/ > About 3 weeks ago. > > Will "I was born not knowing and have had only a little time to change that here and there." Richard Feynman
Re: Possibly going up to VCF, stuff I would like to sell/get to proper people pdp8/12/HP stuff
> On 04/11/2022 7:43 AM Chris Zach via cctech wrote: > > > On 4/10/2022 6:05 PM, Ethan Dicks wrote: > > Totally unrelated event. > Ok. Does TCF still happen? > > > It appears so: https://tcf-nj.org/program/ About 3 weeks ago. Will
Re: Core memory
> On 04/03/2022 8:34 AM Magnus Ringman via cctech wrote: > > > On Fri, Apr 1, 2022 at 10:26 PM Marc Howard via cctech < > cctech@classiccmp.org> wrote: > > > We need to onshore Nixie production now! ;-) > > Gentle plug for https://www.daliborfarny.com/. I got excited by that until I saw there was no pricing and no availability. :-( Will
Re: Commodore vic 20 poweroff
> On 03/16/2022 2:58 PM Fred Cisin via cctech wrote: > > > > On Wed, 16 Mar 2022, Diedrich, Bryce via cctech wrote: > > > Just got a Commodore Vic-20. What is the safest way to power it off when I > > > am done using it? > On Wed, 16 Mar 2022, geneb via cctech wrote: > > Turn it off. > Then disconnect the power cord from the wall. > Clean the machine > Place it in a sealed container with vaccum or inert gas > > Optional: (if you are "done using it") > Post it on eBay as "R@RE" > or > place in a vault > or > drop it off at the recycling center But if you aren't completely done using it, you will likely turn it on again which is a more dangerous activity. VIC power supplies have a reputation of dying and taking the computer out with them. Many people have replaced the power supply on their VIC. The Denial wiki and forum: http://sleepingelephant.com/denial/wiki/index.php/VIC-20 is a good source of power supply options. You can also see what I did: http://wrcooke.net/classiccomputer/vicpower/vicpower.html If you really ARE done using it, you can mail it to me :-) Will
Re: Intel/Altera Dev, Seeking Quartus II old versions
> On 02/21/2021 9:23 AM Ethan O'Toole wrote: > > > > I think I have at least ver 12 for Linux. Of course it's pretty big. > > I can upload it to my web page for download if you like. Let me know. > > It will be at least tonight or tomorrow morning before I get a chance. > > Will > Awesome! That would be great! > > Thanks! > > - Ethan I found what seems to be 12.1 Service Pack 1 on my archive drive. There are two of them. I think the second one with "free" in the name is for windows. The other is for Linux. I believe, but I'm not certain, that these were extracted from the download bundle when I got them. I didn't try installing them now, although I'm pretty sure I did when I got them. AT least the LInux one. Anyway, here are the links. If you have any questions let me know. There is also a license file, but I doubt it will be helpful. I will leave these up for at least two or three days. Will http://wrcooke.net/quartus/quartus_12.1sp1.tgz http://wrcooke.net/quartus/quartus_12.1sp1_free.tgz http://wrcooke.net/quartus/license.dat "A person who never made a mistake never tried anything new." -- Albert Einstein
Re: Intel/Altera Dev, Seeking Quartus II old versions
> On 02/20/2021 12:11 PM Al Kossow via cctech wrote: > Can you still get license keys for the older versions? I'm at work right now and not able to verify, but I think at some point they switched to a non-license "free" version that required no license key or perhaps a fixed license key. "A person who never made a mistake never tried anything new." -- Albert Einstein
Re: Intel/Altera Dev, Seeking Quartus II old versions
> On 02/19/2021 4:49 PM Ethan O'Toole via cctech wrote: > > > https://www.intel.com/content/www/us/en/programmable/downloads/download-center.html > > If anyone has any install bundles below version 13 for Quartus II it > would be much appreciated. > > - Ethan I think I have at least ver 12 for Linux. Of course it's pretty big. I can upload it to my web page for download if you like. Let me know. It will be at least tonight or tomorrow morning before I get a chance. Will "A person who never made a mistake never tried anything new." -- Albert Einstein
Re: Small C ver 1.00 source?
> On July 13, 2020 at 2:13 PM Chuck Guzis via cctech > wrote: > > On 7/13/20 11:59 AM, Will Cooke via cctech wrote: > > Thanks. I found the one(s) on Simtel and they weren't the right ones. I > > "think" the 1.1 that is on there is for the IBM PC (8088) or maybe the > > Z-80. In any case, I think it's been found.The github one: > https://github.com/trcwm/smallc_v1 > is the 8080 version, 1.1 and claims to be a transcription from theoriginal > DDJ article. > --Chuck Thanks, Chuck, It's interesting I didn't find that one. There are various others on Github but I didn't see that one. I will do a file comparison between that one and the one Phil provided. Thanks, Will
Re: Small C ver 1.00 source?
> On July 13, 2020 at 1:30 PM Phil Budne wrote: > > I can't make ANY assertions about version or pedigree of the files(which came > to me in 1981 when I was using a PDP-10), but they APPEARto be from Ron Cain > himself, from SRI-KL (TOPS-20): > ftp://ftp.ultimate.com/pdp10/c80.tar.gz > Which contains runtime files from November 1979, and compiler filesdated June > 1981. Hi Phil, Thanks! That sure looks like the right one. It is 8080 code, the comments and docs mostly match what is published from a quick look. I will look into it more when I am home and have some time. But I do believe that is the "original" as published in DDJ. Notes and justification I started looking for this mainly because I wanted to play with it. I want to actually use it to write some code and see how hard it is to write usable code with the limited subset of the earliest released version. But when I started looking I was shocked that I couldn't find the original. There are dozens, at least, of derivatives in various versions. Z80, 8088, 6502!, TI 9900 I think and more. Floating point, structs, optimizers, etc. I personally think this was a VERY important piece of software. I think the number of derivatives speaks volumes of how important it was. But I couldn't find the original. I feel it should be preserved. Even the DDJ Small C CD ROM didn't have it! (They only used 34Megs of the Disk so they had plenty of room.) Anyway, it looks like Phil found it. I appreciate all the efforts getting it. Does anyone have any suggestions as to where it should go for safekeeping? I plan on putting it on my web site, but that is far from an archival solution. Thanks, Will
Re: Small C ver 1.00 source?
> On July 13, 2020 at 1:17 PM Chuck Guzis via cctech > wrote: > > On 7/13/20 10:07 AM, Will Cooke via cctech wrote: > > Unfortunately, no. That was one of the first places I looked. They have the > > 2.1 version from the Small C handbook (James Hendrix) and some other > > derivatives, but not the original 8080 version 1.0. > > Thanks,WillSIMTEL20 claims to have 1.1, but I don't know how it differs. > --Chuck Hi Chuck, Thanks. I found the one(s) on Simtel and they weren't the right ones. I "think" the 1.1 that is on there is for the IBM PC (8088) or maybe the Z-80. In any case, I think it's been found. Thanks for helping. Will
Re: Small C ver 1.00 source?
> On July 13, 2020 at 10:57 AM Chuck Guzis via cctech > wrote: > > On 7/13/20 5:22 AM, Will Cooke via cctech wrote:> I'm trying to find source > files for the very first, original, ver 1.00(?) small C compiler. I have the > DDJ issue with the printed source (minus the assembly language runtime libs.) > I have found all sorts of derivative works, but I haven't found files of the > original version. My old eyes aren't up to typing in 13 pages of scanned copy > of printed dot matrix listings. > > Does anyone know where a downloadable copy of these files can be found? Or > > have a copy they could send? > > Thanks,Will > > "A designer knows he has achieved perfection not when there is nothing left > > to add, but when there is nothing left to take away." -- Antoine de > > Saint-Exupery > > > > "The names of global variables should start with // " -- > > https://isocpp.orgIsn't it on the DDJ Resource CD? > http://twimgs.com/ddj/sdmediagroup/images/sdm1123195158574/ddj_devnetwork_small_c.zip > --Chuck Unfortunately, no. That was one of the first places I looked. They have the 2.1 version from the Small C handbook (James Hendrix) and some other derivatives, but not the original 8080 version 1.0. Thanks, Will
Small C ver 1.00 source?
I'm trying to find source files for the very first, original, ver 1.00(?) small C compiler. I have the DDJ issue with the printed source (minus the assembly language runtime libs.) I have found all sorts of derivative works, but I haven't found files of the original version. My old eyes aren't up to typing in 13 pages of scanned copy of printed dot matrix listings. Does anyone know where a downloadable copy of these files can be found? Or have a copy they could send? Thanks, Will "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away." -- Antoine de Saint-Exupery "The names of global variables should start with// " -- https://isocpp.org
Re: A tool many of you may make find useful!
> On June 28, 2020 at 3:29 PM Will Cooke via cctech > wrote: > > > On June 27, 2020 at 5:16 PM Richard Pope via cctech > > wrote: > > Dave,The file is empty.GOD Bless and Thanks,rich!On 6/27/2020 4:55 PM, Dave > > Dunfield via cctalk wrote:>I downloaded the file on a Linux machine. Chrome > > warned me that "this is file is not often downloaded and may be dangerous." > > I opened the .zip file with xarchiver and found several .exe files and two > > .txt files. Being Linux and those being win32 executables, I couldn't run > > them. > Will Thanks,Dave
Re: soviet resistor identification help and maybe lamps?
> On March 8, 2020 at 3:20 AM Adrian Stoness via cctech > wrote: > > not seeing anything els other then the 620hard to get any decent shots of > them with out a macro lens though > as for the lamps if i wanted to test them one at a time would i just givethem > 12V directly? or would it be lower dont have a variable power supplyatm just > an old pc one > On Sun, Mar 8, 2020 at 1:44 AM Holm Tiffe wrote: > > Adrian Stoness via cctalk wrote:> > trying to identify these soviet > > resistors anyone familiar with how theymarked them i see 620 on these ones > > for the panel I found this document from the CIA in the 50s about Soviet parts: https://www.cia.gov/library/readingroom/docs/CIA-RDP80-00809A000700030074-5.pdf Doesn't say much, but indicates they used either the numeric value printed on the resistor or the same color code we use. If the lamps are incandescent you should be able to measure the resistance of the filament, which would likely be in the 100 ish ohm range. A neon bulb should measure open (infinite) I believe. If the lamps are incandescent, the R could be to lower the voltage/brightness. You could try that resistor already there plus various values of resistance in series with the lamp to see if lights and how bright. Or a pot. With a 12V supply and a 1K R in series you couldn't push more than 12mA through it. I would suspect that would be plenty safe. Will
Re: 8048 Family Applications Handbook
> On December 19, 2019 at 9:29 AM crufta cat via cctech > wrote: > > Intel has it on their history site for download. > I have it too but I am not giving it up. ;) I have the paper copy, but I'm trying to get an electronic copy. I can't seem to find the Intel download site. Do you have a link? Thanks! "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away." -- Antoine de Saint-Exupery "The names of global variables should start with// " -- https://isocpp.org
Re: What do to with an Internet-connected PDP-11?
> On April 28, 2019 at 11:24 AM Richard Cini via cctech > wrote: > > So, for playing around, what can I practically do with this? Is it even > possible to access any Web sites (unconventional browsing for sure; I’ve read > about telnetting to port 80)? I’m sure email is possible, as is FTP/Telnet > (I’ve used that inside my lab setup), but I don’t really know where to start > with that. > > > > If anyone has any pointers/suggestions, I’d appreciate it. > Maybe it would be possible to get a text only browser running? https://lynx.browser.org/ "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away." -- Antoine de Saint-Exupery "The names of global variables should start with // " -- https://isocpp.org
Parts source
This may or may not be new or useful to anyone here, but I came across this website by accident today. They have a considerable selection of rather hard to find parts for old home computers, game consoles, and even arcade machines. Figured I would send along the link. http://www.arcadecomponents.com/index.html "He may look dumb but that's just a disguise." -- Charlie Daniels "The names of global variables should start with // " -- https://isocpp.org
Epson PX8 disk emulator
Hello all, I have built an emulator that uses an Arduino and SD card to provide four "floppy drives" for an Epson PX8. It may also be usable with a PX4, but I have no way of trying it. If you would like to build one yourself, or just read about it, the details are here: http://wrcooke.net/projects/pfbdk/pfbdk.html Any feedback is appreciated (I already know the page is crummy.) Especially if you build it I would like to know good or bad experience. Thanks, Will "He may look dumb but that's just a disguise." -- Charlie Daniels "The names of global variables should start with // " -- https://isocpp.org
