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  1. Replies
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    I worked for a company that was the originator of...

    I worked for a company that was the originator of the CV and CVS (sine wave output) transformer. Ferroresonants have very good points, and some bad ones. They are very good at filtering out...
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    526

    Nothing cracks me up more than when the HR dept....

    Nothing cracks me up more than when the HR dept. writes “needs n years of m”, where m hasn’t even existed for n years.
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    1,164

    I did a lower case converter with a 2716,...

    I did a lower case converter with a 2716, wire-wrapped it a long time ago, and it worked OK, plugging into the lower case socket. I didn't have these problems. There really was a 2513-LC chip and I...
  4. Thread: Time flies....

    by Slob
    Replies
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    544

    I got one too. I never buy or sell anything big...

    I got one too. I never buy or sell anything big (a lot of my purchases are under $10), but it does add up.
  5. If you get a horizontal line on a CRT,...

    If you get a horizontal line on a CRT, IMMEDIATELY turn it off, it could leave a burn on the phosphor that will be visible after the problem (vert osc?) has been fixed.
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    1,385

    If you bought those cheap, they won't work. The...

    If you bought those cheap, they won't work. The price of UVLED's goes up exponentially as the Angstroms go down. AFAIK there are very few "true" UV-C LED's yet and they are costly.

    I'd like to...
  7. Thread: Erasing UV EPROMs

    by Slob
    Replies
    44
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    3,070

    No, I haven't seen an inexpensive one sold new in...

    No, I haven't seen an inexpensive one sold new in 15 years that could, which is why I had to build one. I know it does 2708's, and it probably does 2704's.
  8. Replies
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    I've updated the Hackaday site for this project...

    I've updated the Hackaday site for this project with updates to the MIL monitor and Hangman.
  9. Thread: Mark 8 variant

    by Slob
    Replies
    30
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    5,075

    That 1702A programmer is a freaking work of art;...

    That 1702A programmer is a freaking work of art; I'd daresay that is the finest 1702A programmer ever made or ever will be made. And I was so proud of my 2704/2708 PIC-based programmer that also used...
  10. Thread: Mark 8 variant

    by Slob
    Replies
    30
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    5,075

    I'd say, that is the nicest functioning front...

    I'd say, that is the nicest functioning front panel for an 8008 I've ever seen, although the MIKE series 8008's from Martin Research (see Byte magazine #1, first ad page) come close. BTW I worked in...
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    I did get a round tuit, and fixed/recompiled the...

    I did get a round tuit, and fixed/recompiled the MIL monitor. This solved a weird problem I had where the monitor could not dump itself symbolically (DPS). It must have hit the problem instruction...
  12. Thread: Erasing UV EPROMs

    by Slob
    Replies
    44
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    3,070

    If you bought the same model that I did, I took...

    If you bought the same model that I did, I took it apart and it is easily the most electrically dangerous item in my house. I won't even leave it plugged in unattended. Undertaker's Labs approved....
  13. Tempting. Given the scarcity of the machine those...

    Tempting. Given the scarcity of the machine those keytops / mech's don't seem irreparable/impossible to replace. I've worked with much worse.

    Hopefully that dot hasn't been sitting there for a...
  14. Replies
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    Somehow, my mom and dad acquired an IBM Disk Pack...

    Somehow, my mom and dad acquired an IBM Disk Pack cover sometime in the 1960's.
    My mom used it to cover cakes!

    It was made of pretty good plastic and we had it for a long time.
  15. That is an interesting/desirable chip collection....

    That is an interesting/desirable chip collection. I've got a good number of 4004/8008/8080's, but the only sort of rare ones that I have are a MIL 8008 in purple ceramic/gold that works, and a VEB...
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    PS: Please do not laugh at my code. The only...

    PS: Please do not laugh at my code. The only coding languages I've used to earn a buck in the last 20+ years are SQL and PL/SQL!!!!
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    Through amazing coincidence, I've been playing...

    Through amazing coincidence, I've been playing with my toys during this downtime, and was actually thinking about _this very issue_ this week. I knew that somewhere I had seen this bug mentioned....
  18. Thread: Overlooked?

    by Slob
    Replies
    25
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    2,184

    I built a TV Typewriter II but I never got the...

    I built a TV Typewriter II but I never got the two hooked together.
  19. Thread: Overlooked?

    by Slob
    Replies
    25
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    2,184

    The computers were expensive. The peripherals...

    The computers were expensive. The peripherals were even more expensive. This was solved with using TV’s as monitors, although going through RF on 70’s TV degraded the quality/resolution even further....
  20. Thread: Overlooked?

    by Slob
    Replies
    25
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    2,184

    I think that people lose sight of how _very_...

    I think that people lose sight of how _very_ expensive computing stuff was in the early era. Having a pre-built computer powerful enough to do something in a language that I would understand was flat...
  21. Unless you really need to do this commercially,...

    Unless you really need to do this commercially, the cheapos on eBay really do work although they are complete POS. I took one apart and the construction techniques was shocking. Literally. I would...
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    Hmmm...at that rate, I have two examples of...

    Hmmm...at that rate, I have two examples of Robert Armstrong's PDP-8 6120 based PDP-8/e implementation besides the one I wire-wrapped. Those are about 15-20 years old. Are they vintage :)
  23. I found that unit to be pretty good although it...

    I found that unit to be pretty good although it doesn't do 21 volts for early 2716's. I made an adapter for it so that can.
    I'm pretty sure that the M2764A-2F1 is doable like any other 2716 (EXCEPT...
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    This gets my vote. Other than compatibility...

    This gets my vote. Other than compatibility issues and/or unfixable bugs on other chips, this was the WORST, IMO, in terms of price/performance EVER. Every time one lazily booted up Windows it...
  25. “Bad flyback” is the diagnosis for when you’ve...

    “Bad flyback” is the diagnosis for when you’ve blown two replacement HOT’s and you don’t know where else to look :)
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