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Thread: Possible to shorten 5 second delay on M2-ATX?

  1. #1
    Variable Bitrate
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    Possible to shorten 5 second delay on M2-ATX?

    I'd like the computer to be on as fast as possible after turning the key. Any way to shorten, or get rid of, the 5 second power on delay?

    Thanks!
    -- Kevin

  2. #2
    FLAC
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    You have to reprogram the PIC chip on the M2 to change the delay value. But I have no idea how, maybe someone more knowledgeable can chip in.

  3. #3
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    Yes.

    nobb is correct, you need a pic programmer.
    source code of m1-atx:
    http://www.epiacenter.com/modules.ph...rticle&sid=529
    I believe the source code for m1-atx and m2-atx are identical.

    reference thread:
    M1-ATX microcontroller source
    dsatx in voompc 2 case <HERE>

  4. #4
    FLAC
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    So does anyone know anything about the actual chip itself? What kind of programmer do you use? If it is a common chip and programmer, then maybe I can find an EE prof at my university who might let me use one of these...

  5. #5
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    looks like just a pic12/16. any pic programmer would do.
    pickit2, picstart plus, etc.
    dsatx in voompc 2 case <HERE>

  6. #6
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    Yes, the chip is a PIC16f819 so, as stated, any programmer will work. PicKit2, ICD2, *NEW* ICD3, lol There are plenty of schematics online for very simple PIC programmers with basically one transistor that will work and cost under $5 to build.

    Be careful though, this is an old version of the firmware. Last modified April 4, 2005 I don't see a version number but the newest is v1.4 and looks like it contains multiple fixes and new features which you'll lose if you recompile this old version. v1.4 applies to models after 6/8/08 it looks like, but I can't find a newer source

    Also, the code is atrocious, comments barely help. Intuitive enough to modify the delay times though I guess.. I work for Microchip so I'm a stickler about these things,

  7. #7
    FLAC
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    Apparently the newer versions of M2 have some code changes which fixes certain timing issues (or so Ive read). So its probably best to stick with the newer code.

  8. #8
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    I have no problem modifying code to my liking, but not if it's old outdated code, that might be missing some critical bug fix that will keep me from having a dead battery. Oh well, I guess I'll just live with it.

  9. #9
    FLAC
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    Bump, any progress on this? I dont know anything about PIC programming, but can you extract the source code from the chip itself, or do you need to download it somewhere separately? The M series source code doesnt seem to be documented that well.

    Im eager to try this out if only I knew what to do. Doesn't really seem economical to buy a programmer just to shorten the delay by a few seconds. If there was interest, maybe someone can buy the chips in bulk, reprogram them and sell it off.

    These two programmers might work:
    http://cgi.ebay.ca/Enhance-JDM-PIC-p...d=p3286.c0.m14
    http://cgi.ebay.ca/Microchip-PIC-JDM...d=p3286.c0.m14

  10. #10
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    Any news ... I'd be interested in a new chip for my M2 to get rid of that 5 second ON delay.

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