4am

@a2_4am

to (de)protect and (pre)serve

I live on track $00.
Joined February 2014

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  1. Pinned Tweet
    May 14

    Passport is a verification and copy program for Apple II floppy disks. v20170514 sports a huge list of improvements:

  2. 5 hours ago
  3. 6 hours ago
  4. 6 hours ago
    Replying to

    The inventor of the throat lozenge died yesterday. He'll be buried today with no coffin.

  5. 7 hours ago
    Replying to

    Throats lozenge

  6. 7 hours ago
    Replying to

    Bits copier

  7. 8 hours ago
  8. Retweeted
    Jun 7

    Didn't see this in the usual places, so: Add & Subtract with ALF, © 1988 Vision Software, Inc. unprotected DOS 3.3

  9. Retweeted
    Jun 8

    Applesauce is successfully generating disk images based solely on the timing between flux transitions. Refactoring the analysis code now.

  10. Retweeted
    Jun 7

    A load of new 8-bit software on 3.5" disk archive...most of which had not been archived in any previous format.

  11. Retweeted
    Jun 6

    Proudly presenting my new Podcast about security research and the researchers behind it.

  12. Jun 6

    . Did you write the bootloader for International Gran Prix? It was in the box you sent, but not a Broderbund title.

  13. Jun 6
    Replying to

    Late-stage copy protection (1988+) was mostly just "baby, don't hurt me" before the platform collapsed altogether.

  14. Jun 6
    Replying to

    You can literally search for "4C 00 C6" (JMP to reboot) and NOP it out to defeat the protection. It'll fall through to the success path.

  15. Jun 6
    Replying to

    Passport didn't recognize it, but the bootloader loads an extra sector that contains a minimal FBFF check and reboots if it fails.

  16. Retweeted
    Jun 5
    Replying to

    That would be another one of the titles I also worked on.

  17. Jun 5
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  21. Jun 5

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