Image Map Image Map

Search:

Type: Posts; User: Dwight Elvey

Page 1 of 20 1 2 3 4

Search: Search took 0.06 seconds.

  1. ARM isn't immune either. It is just that most are...

    ARM isn't immune either. It is just that most are embedded and don't run on the web where things can be loaded. Tablets can be, though. I've not looked into RISC-V, which likely has problems with...
  2. Replies
    11
    Views
    204

    As Dave says, you'll likely need an oscilloscope....

    As Dave says, you'll likely need an oscilloscope. It is just a fact of life. A lot can be done with a good logic probe but it is useful for the simpler error, of a stuck signal, not on a bus. The...
  3. As Mike says, both have to run some bad guys code...

    As Mike says, both have to run some bad guys code at the machine level. I could write a Meltdown code and give it to you to run but that is something you could just say you don't trust it and not run...
  4. It is not likely susceptible to Meltdown but most...

    It is not likely susceptible to Meltdown but most any Speculative processor is susceptible to Spectre, that has cache. Spectre does require help from some other code that runs at the privileged ...
  5. Replies
    8
    Views
    208

    Forth makes a great monitor. It is a little large...

    Forth makes a great monitor. It is a little large compared to most monitors but gives abilities that you are not likely to find in most monitors.
    Dwight
  6. Replies
    8
    Views
    208

    I've written a version of Forth ( I don't recall...

    I've written a version of Forth ( I don't recall which Forth I based it on ) to run on the 80C188 board. It was one that I originally wrote to be on a 80C186 board I got with GPS. I used it to log...
  7. Replies
    134
    Views
    6,030

    Oops, I forgot about that. Dwight

    Oops, I forgot about that.
    Dwight
  8. Replies
    134
    Views
    6,030

    If you find a connector pin that is bad,...

    If you find a connector pin that is bad, depending on the type, these can be replaced. If you have a donor connector, most will push out from the bottom. To put one back in is a little tricky. I put...
  9. Replies
    21
    Views
    699

    So, it is still the juicy ones or the tantalums....

    So, it is still the juicy ones or the tantalums. Not just all of the capacitors. I generally don't look at the others. The newer surface mount ceramics seem to fail a lot, almost as much as...
  10. Replies
    21
    Views
    699

    When you say this, do you mean drives that load...

    When you say this, do you mean drives that load down the power supply or drives that only don't work. Most capacitor failures that I've seen are on the power rails. I've seen a few else where but not...
  11. Replies
    134
    Views
    6,030

    Check your regulators under full load. I had a N*...

    Check your regulators under full load. I had a N* that with no load, the 12V line looked fine. Once I had both drive starting, the 12V line would drop and kill the DRAM. They'd used two regulators in...
  12. Replies
    21
    Views
    699

    I use a piece of tape, cut in a small strip, to...

    I use a piece of tape, cut in a small strip, to tack the chip down while soldering the ends. After soldered, I remove the strip. Use separate rosin flux so you don't have to depend on the solders...
  13. Replies
    8
    Views
    208

    There was one chip on the board, related to bus...

    There was one chip on the board, related to bus management, but I forget what is was, that is not available any more. I recall that when the board first came out, there was a bug in this chip (...
  14. Replies
    15
    Views
    248

    If the board doesn't work, it is not likely the...

    If the board doesn't work, it is not likely the power line filter. I know this likely falls on deaf ears but replacing the capacitors is mot likely to make it work. The capacitor that is missing will...
  15. Replies
    15
    Views
    248

    Its a power rail capacitor. Check to see which...

    Its a power rail capacitor. Check to see which rail it is on. 10 or 20 uf tantalum with sufficient voltage would be fine.
    Dwight
  16. Replies
    7
    Views
    397

    To bad you don't have a Polymorphic video card....

    To bad you don't have a Polymorphic video card. It also has a parallel input port that is designed to work with a parallel keyboard. There are parallel port boards for the S100. As I recall, some of...
  17. Another option is to use a boot floppy. Dwight

    Another option is to use a boot floppy.
    Dwight
  18. I'm with you. I like small flat tips. Pointed...

    I'm with you. I like small flat tips. Pointed ones are hard to keep the tinning clean at the point.
    Dwight
  19. Replies
    15
    Views
    509

    You can get most of the feeling with the various...

    You can get most of the feeling with the various arduino emulators. These are small enough to hold in your hand.
    Dwight
  20. They all seem to start with 733W I suspect the...

    They all seem to start with 733W I suspect the 733 may be a model number.
    Dwight
  21. Replies
    17
    Views
    393

    Intel sells all range of designs for almost every...

    Intel sells all range of designs for almost every ix number. I don't consider that to be a current design just because it says i5 They have been making i5s for quite some time.
    Dwight
  22. Replies
    17
    Views
    393

    I'm not talking about the AMD 1600 chip. Dwight

    I'm not talking about the AMD 1600 chip.
    Dwight
  23. Replies
    8
    Views
    345

    Using that trouble shooting chart with a clone is...

    Using that trouble shooting chart with a clone is likely to not help much.
    A 74LS109 and a 74LS10 are about as different as a motorcycle and a Mack truck.
    Trouble shooting is a sequence of looking...
  24. Replies
    17
    Views
    393

    It used to be that the processors always had what...

    It used to be that the processors always had what was called significant head room. This means they'd always have a relatively large safety band of clocking speed that ensured that the part would...
  25. After all, they are called soldering pencils. One...

    After all, they are called soldering pencils. One should hold it like a pencil, shouldn't one?
    Dwight
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4