Image Map Image Map

Search:

Type: Posts; User: Chuck(G)

Page 1 of 20 1 2 3 4

Search: Search took 0.53 seconds.

  1. Replies
    5
    Views
    46

    Eh, why not be different? If IBM could put...

    Eh, why not be different? If IBM could put APL360 in ROM on the 5100, why not APL in ROM on the 5150?

    Confuse the heck out of the BASIC people. :)
  2. That's not good--5 and 6 should come directly...

    That's not good--5 and 6 should come directly from the keyboard. 2 and 3 would be outputs.

    A brief question--your logic probe has a separate LED for "Pulse"?

    exempli gratia
  3. Okay, you're good--this is only an 8 pin device,...

    Okay, you're good--this is only an 8 pin device, so you need to first check for +5 between pins 1 and 8.
    When you hit a key on the keyboard, you should see a pulse train on pins 5 and 6 and a...
  4. Okay, with the firmware, that should work right...

    Okay, with the firmware, that should work right out of the box. Got a logic probe or scope?
  5. Replies
    9
    Views
    187

    A very cheap way to check capacitors is one of...

    A very cheap way to check capacitors is one of the little LCR-TC1 testers. Accurate enough for a go-no go test and can identify all sorts of components.
  6. That's the way it should be--there's only 03FE...

    That's the way it should be--there's only 03FE worth of flash on the thing. Which PIC MCU did you use?

    Time, I think, to do some probing with a scope or a logic probe. The design's pretty...
  7. 1984. It was then that I ported my own editor...

    1984. It was then that I ported my own editor from x80 code, finally. Still use it on occasion (it's pretty small)
  8. Replies
    5
    Views
    66

    Perhaps--they can be a bit abrasive, I...

    Perhaps--they can be a bit abrasive, I understand. And single-use only, obviously.
  9. Replies
    4
    Views
    57

    "Well spotted on the center negative pin, most...

    "Well spotted on the center negative pin, most adapters have center positive pin. "

    That's one of the things I hate about barrel connectors--no convention universally observed, including the same...
  10. There are some inaccuracies in the narrative. ...

    There are some inaccuracies in the narrative. The header is identified as an IDE connector; it's a legacy floppy (SA400) connector.
    He also says that the +5 is unused, with the disk being run by...
  11. Debian still uses Firefox ESR (78.6.1) as the...

    Debian still uses Firefox ESR (78.6.1) as the default browser; it works fine on eBay.

    Epiphany is still available, if you want a WebKit browser--and it can be installed on W10, using WSL.
  12. Replies
    5
    Views
    66

    I'd think that tissue paper would leave a lot of...

    I'd think that tissue paper would leave a lot of detritus behind as it disintegrated. I suppose you might try filter paper, but the commercial cleaners used a "nonwoven cloth" disk, something like...
  13. PC-Write (https://en.wikipedia.org/wiki/PC-Write)...

    PC-Write was one of the earliest pieces of shareware and was pretty highly regarded back in the day.
  14. Serial mice were so common as to carry logos on...

    Serial mice were so common as to carry logos on them from various retailers, who often sold them for as little as $1 with any accompanying order. I still have a few "Surplus Software" labeled ones. ...
  15. Replies
    18
    Views
    616

    Markings on the CRT have little to do with the...

    Markings on the CRT have little to do with the manufacturer of the electronics. In the USA, for example, "Clinton" was a very common name to see on CRT labels.
  16. Have you verified the programming of the PIC? ...

    Have you verified the programming of the PIC? "Keyboard bad" error says that it's not responding.
  17. Depends on the features. If what you want is a...

    Depends on the features. If what you want is a text mode editor with things such as word wrap, etc., there were lots.

    Multi-Edit, Qedit, PC-Write... The first versions of MS Word would run...
  18. Replies
    7
    Views
    151

    I've used my Brother CRT (CT-1500) on an MDA. ...

    I've used my Brother CRT (CT-1500) on an MDA. Works fine. Can't say about any others.
  19. Well, sort of--DMA boundaries don't necessarily...

    Well, sort of--DMA boundaries don't necessarily correspond to segment boundaries. The rule is that an ISA DMA transfer must not cross a 64K (8 bit) or 128K (16 bit) physical address boundary, which...
  20. Replies
    18
    Views
    616

    Yes, that looks right.

    Yes, that looks right.
  21. Replies
    7
    Views
    126

    Hard to say--I wonder if there's a small arc...

    Hard to say--I wonder if there's a small arc developing on the HV side of the flyback transformer.
  22. Replies
    18
    Views
    616

    I use plain old CRC QD 2130 contact cleaner, but...

    I use plain old CRC QD 2130 contact cleaner, but even any automotive contact cleaner should work. In the old days, the cleaner of choice would have been carbon tetrachloride, then Freon TF. Now,...
  23. Not to mention that there's a fair number of...

    Not to mention that there's a fair number of devices whose drivers are perfectly capable of sharing an IRQ or DMA.
  24. Replies
    10
    Views
    241

    Wouldn't it be a bit more straightforward to...

    Wouldn't it be a bit more straightforward to simply install a caching controller?
  25. Replies
    5
    Views
    111

    I can make some guesses on some of these, (the...

    I can make some guesses on some of these, (the ISA card looks like a SASI adapter), but the resolution is far too low for me to read part numbers. Sorry.
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4