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Thread: S3 prom clarification

  1. #1
    Join Date
    Apr 2011
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    S3 prom clarification

    Just so I am perfectly clear on this. There is no way to run a custom non Tivo OS without a prom hack; correct?

    Is there anyone who can get me a copy of the unmodified prom blob?

    Has anyone extracted the Tivo public key used to check kernel signing?


    Thanks,
    Steve

  2. #2
    Join Date
    Dec 2004
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    Quote Originally Posted by pc-reviewer View Post
    Just so I am perfectly clear on this. There is no way to run a custom non Tivo OS without a prom hack; correct?
    Correct. Specifically, the TiVo kernel checks the file systems and the checksums of various files. If anything unexpeted is found, the TiVo will either GSOD or just endlessly reboot. Neutering the kernel by inserting a null initrd instead of the trusted initrd breaks the chain of trust and allows one to install any software one likes and modify any config files with impunity.

    Quote Originally Posted by pc-reviewer View Post
    Is there anyone who can get me a copy of the unmodified prom blob?
    Check out Omikron's Full Service Prom Mod thread. Hell sells modified PROMs, but I'm sure he could get you an unmodified PROM, or at least the code.
    Having trouble with TyTool? Try TyTool Documentation
    Need to hack an S3 / THD? Try S3 Hacking Script

  3. #3
    blahman is offline blah blah blah blah blah.
    Join Date
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    Check the Master PROM Patch Locations thread from Omikron and you'll see I posted links to all the prom images I was able to find while I was recently hunting for the S3 OLED prom (someone was kind enough to send that one to me).

  4. #4
    Join Date
    Nov 2004
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    420
    Nice work chasing those down!

  5. #5
    Join Date
    May 2007
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    Quote Originally Posted by lrhorer View Post
    Check out Omikron's Full Service Prom Mod thread. Hell sells modified PROMs, but I'm sure he could get you an unmodified PROM, or at least the code.
    I wonder if he kept any of ours???

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