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    Anyone know which bytes in EC ver 1.02.04 control fan speed?

    Discussion in 'Sager and Clevo' started by swampzero, Feb 7, 2016.

  1. swampzero

    swampzero Newbie

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    I've been trying to use RWE to change my fanspeed in a clevo laptop with EC ver 1.02.04.

    Well, I messed around with it and I did manage to get the fans to change behavior, but it looked dangerous and I couldn't understand which bytes made the difference despite comparing snapshots before and after the fans changed speed. Some of them kept changing back too.

    So I'm asking if anyone already found out the important addresses already.
     
    swampzero, Feb 7, 2016
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    i_pk_pjers_i likes this.
  2. i_pk_pjers_i

    i_pk_pjers_i Even the ppl who never frown eventually break down

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    I think @Prema would know, but he's really busy these days.
     
    i_pk_pjers_i, Feb 8, 2016
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  3. swampzero

    swampzero Newbie

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    Yeah he probably would, I've seen his work in at least 2 forums so far.


    Still, do you know if changing the EC addresses with RWE is even dangerous? I assumed it is, but now I'm not so sure. It's not like I'm changing the EC's firmware right?

    If I know it's not dangerous (To a reasonable extent, I'm paying attention to fans and temp levels) I'll probably just try to reverse engineer something that works.
     
    swampzero, Feb 8, 2016
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  4. i_pk_pjers_i

    i_pk_pjers_i Even the ppl who never frown eventually break down

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    I would say yes it's dangerous, since I don't even know what you're talking about. I know a bit about EC, EC2, BIOS/UEFI, etc, but not a TON about them. I'm nowhere near Prema's skill level so I'm definitely not the right person to ask. Sorry.
     
    i_pk_pjers_i, Feb 8, 2016
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  5. GTVEVO

    GTVEVO Notebook Deity

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    Yes altering some of the EC information is non forgiving to my knowledge so I would be very very careful as when its bricked I believe you can't get back in and flash it regarding the P870dm.
     
    GTVEVO, Feb 8, 2016
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  6. swampzero

    swampzero Newbie

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    I'm not sure I understand these things at all, but isn't the EC firmware that you usually 'flash' a different thing than the values in the EC address space in memory that you change with a program like ReadWrite Everything?

    I thought the latter is a dynamic thing that gets re-initialized on reboot. Not to say that I wanna go ahead and **** with it just to see the worst that can happen.

    I did manage to identify some relevant bytes by the way, but they seem to revert back. I'm probably missing some 'flag' bytes
     
    swampzero, Feb 8, 2016
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  7. TomJGX

    TomJGX I HATE BGA!

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    General rule, don't mess with BIOS and EC stuff unless you absolutely know what your doing.. You'll get a nice brick and need to spend $500 on a new motherboard usually..
     
    TomJGX, Feb 9, 2016
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