Image Map Image Map

Search:

Type: Posts; User: Chuck(G)

Page 1 of 20 1 2 3 4

Search: Search took 0.41 seconds.

  1. I see where it says "Restore OSCCAL". Well,...

    I see where it says "Restore OSCCAL". Well, maybe we can make it work anyway. Change the word at 03FF to 34 40. (pulling a value out of the air; the important thing is that the value at this...
  2. The upper 2 bits set to 0 on the odd bytes is...

    The upper 2 bits set to 0 on the odd bytes is correct--the program memory in a PIC12 is 14 bits wide.

    However

    Your programmer over-wrote the word at 03FF, which will cause the internal...
  3. I take it that your programmer did not modify...

    I take it that your programmer did not modify location 03ffh, and did program the configuration fuses as the source shows:



    __CONFIG _MCLRE_OFF & _CP_OFF & _WDT_OFF &...
  4. Replies
    28
    Views
    2,213

    Strange. There used to be a stock number for...

    Strange. There used to be a stock number for the 6" bands--SF-6500, package of 50 (I have one such here). Perhaps a pleading to www.baumgartens.com is in order?
  5. That's good. Give me a bit to think about this...

    That's good. Give me a bit to think about this one--many of these things have been built with exactly this firmware, so it's got to be something simple that we're looking for.
  6. Replies
    6
    Views
    80

    Well, Forth-in-ROM did find its way into the Open...

    Well, Forth-in-ROM did find its way into the Open Firmware PCI (IEEE 1275) standard. Too often overlooked--a great idea.
  7. Replies
    6
    Views
    80

    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. :)
  8. 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
  9. 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...
  10. 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?
  11. Replies
    9
    Views
    191

    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.
  12. 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...
  13. 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)
  14. Replies
    5
    Views
    75

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

    Perhaps--they can be a bit abrasive, I understand. And single-use only, obviously.
  15. Replies
    5
    Views
    67

    "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...
  16. 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...
  17. 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.
  18. Replies
    5
    Views
    75

    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...
  19. 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.
  20. 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. ...
  21. Replies
    18
    Views
    623

    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.
  22. 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.
  23. 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...
  24. Replies
    7
    Views
    154

    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.
  25. 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...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4