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Recent content by djg

  1. djg

    Anyone else here really miss electronics stores?

    It wasn't just computer book, it had technical books in other areas also.
  2. djg

    Cromemco JS-1 Joystick Replica

    Same. Did a quick web search and couldn't find any sets at price for occasional use. May buy one of the size I need next time I'm working with material that would benefit. May be trickier to use without proper tooling.
  3. djg

    DEC Paper Tape Punch/Reader Pricing

    RK05 is 203 tracks, 2 surfaces, 16 sectors per track, 256 words per sector 203*2*16*256 = 1662976 words or 2494464 bytes Punch is 50 characters per second 2494464/50 = 49889 seconds 49889/60/60 = 13.86 hours. Still not going to try. Didn't find how long a box of tape was in a quick search to...
  4. djg

    What did I do to my PDP-8 today.

    I maintain 3 33's. They all act up in unique ways. I go with figure out what the exact symptom is such as is a single bit error, multiple etc and then try to figure out what could be causing it. Last problem reading tapes was really the contact block in the keyboard broke so was moving around...
  5. djg

    DECtape or LINCtape?

    6 letters make it tough figuring out what they are. A couple are normal system files that exist elsewhere. The rest didn't hit anything in my archive. They are source files so better chance you can figure out what they do though frequently comments are sparse to non existent. Nothing says need...
  6. djg

    DECtape or LINCtape?

    Yes this will work. There are some LINCtapes which are shorter so won't work but what you have look normal. Might be good to post pictures of the directory listings to see if anything might be worth reading before overwriting.
  7. djg

    IBM System/36 5364 - Imaging and Emulating Physical Disks

    Had to make me look at the documentation. It was wrong to out of date. I have updated it and made precompensation selectable from the command line. A few people have successfully used it. It is missing handling bad sectors on the target disk. For most of the format either the controller doesn't...
  8. djg

    IBM System/36 5364 - Imaging and Emulating Physical Disks

    Good to hear its all working well for you is now: FYI: You don't need to do that now since executables are in path of latest images. You can just setup_mfm_read mfm_read from any directory. I updated wording in ** Changes to instructions ** here to be clearer...
  9. djg

    What is the accepted wisdom with fixing errors in vintage computer headers etc

    I would go with an archive of the as released code and a runable image, a release of fixed OS of Tek released software that follows your development,and a release with all your improvements like your GCC port assuming the effort isn't too great. The fixed tek release could also be replaced by...
  10. djg

    Pertec-interface tape controller.

    The general approach I used to update my github repository is I have a local copy. If you don't have a local copy you can make one with git clone I then copy the updated files into my local copy and in that local copy use these commands git add . git commit -m 'Commit comment' if your using tags...
  11. djg

    Recovering data from MFM drive if paired controller is dead

    Correct. Same revision etc are interchangeable. Seen a couple cards where different firmware versions are incompatible but frequently doesn't matter. Some brands different similar models are interchangeable. No list exists to document what is compatible. If things work a lot of people don't...
  12. djg

    Reproducing Calcomp Logo

    Thanks
  13. djg

    Reproducing Calcomp Logo

    Looks perfect from 6' away. Logo is around 3" long. With reasonable viewing distance you can detect that it has a couple pinholes in the solid areas. The 50 year old boxes aren't perfect anymore either. I don't think I'll go to the effort of getting a screen print. If it doesn't hold up or I...
  14. djg

    Cromemco JS-1 Joystick Replica

    Updated with my results. I tried a slightly different product which worked pretty well. Normal waterslide would avoid the missing toner but either will have slightly visible label or need clear coat over it to hide. Would protect graphic better since printing below film. Not sure how it will...
  15. djg

    Reproducing Calcomp Logo

    Did try the waterslide option. When buying it I saw this waterslide version that is a form of toner transfer so decided to try it. If it didn't work would remove it and go with the normal. https://www.sunnyscopa.com/collections/all/products/filmfree-waterslide-decal-paper?variant=36426730143910...
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