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Re: older copy protection...

From "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups comp.arch
Subject Re: older copy protection...
Date 2025-05-25 21:13 -0700
Organization A noiseless patient Spider
Message-ID <1010ppf$1r9ao$1@dont-email.me> (permalink)
References (1 earlier) <10037hd$2o7l0$1@dont-email.me> <10039g6$2ohk0$1@dont-email.me> <100c5ap$tdbq$1@dont-email.me> <100e3sc$1cgi$1@gal.iecc.com> <100eldv$1gdmo$1@dont-email.me>

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On 5/19/2025 12:08 AM, Terje Mathisen wrote:
> John Levine wrote:
>> According to Chris M. Thomasson <chris.m.thomasson.1@gmail.com>:
>>>> "It was impossible to create a disk image without this hardware"
>>>>
>>>> The disk has been cloned on the Applesauce.
>>>
>>> Thanks! I need to ponder on this. Thanks again.
>>
>> The usual approach was to patch the program to disable the code
>> that checked the copy protection.
> 
> The usual "protection" against this was to distribute the checking code 
> across both time and space, only loading/decrypting the next part after 
> verification.

Indeed. Let them get through some of the game, then BAM, they are 
frozen, or crash, whatever...

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Thread

older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-05-13 15:55 -0700
  Re: older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-05-14 16:04 -0700
    Re: older copy protection... Al Kossow <aek@bitsavers.org> - 2025-05-14 16:37 -0700
      Re: older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-05-18 01:21 -0700
        Re: older copy protection... John Levine <johnl@taugh.com> - 2025-05-19 02:09 +0000
          Re: older copy protection... Terje Mathisen <terje.mathisen@tmsw.no> - 2025-05-19 09:08 +0200
            Re: older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-05-25 21:13 -0700
              Re: older copy protection... Vir Campestris <vir.campestris@invalid.invalid> - 2025-06-05 17:09 +0100
                Re: older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-06-05 14:52 -0700
                Re: older copy protection... mitchalsup@aol.com (MitchAlsup1) - 2025-06-05 22:35 +0000
                Re: older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-06-06 12:33 -0700
  Re: older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-06-05 14:49 -0700
    Re: older copy protection... "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-06-06 12:34 -0700

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