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Atari coding BBS
| Re: Old Game Cracks |
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Posted by: Klaz
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Jun,20.2012-22:03
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Easy. :-)
They just modified the program file header after assembling the program.
GEMDOS will not load the entire *.PRG file into mem, but just the number of bytes that are specified for the TEXT and DATA segments in the program header (+ the relocation table, if there is one).
I have toyed with the idea of using this method for my patches - it's nice to have just one single file for all the data + loader code. However, I believe this may not be compatible with newer GEMDOS versions, or Mint etc.
Haven't checked this yet, though...
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[All messages in this thread]
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Topic
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Posted by
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Date
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Old Game Cracks
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Bod/STAX
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Jun,20.2012-21:23
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Re: Old Game Cracks
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Klaz
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Jun,20.2012-22:03
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Re: Old Game Cracks
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Bod/STAX
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Jun,20.2012-23:06
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Re: Old Game Cracks
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ggn
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Jun,20.2012-23:22
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Re: Old Game Cracks
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Pete
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Jun,21.2012-06:30
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Re: Old Game Cracks
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Bod/STAX
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Jun,21.2012-11:39
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Re: Old Game Cracks
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showaddywaddy
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Jun,22.2012-17:54
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Re: Old Game Cracks
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Bod/STAX
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Jun,22.2012-21:51
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Re: Old Game Cracks
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Bod/STAX
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Jun,23.2012-00:24
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Re: Old Game Cracks
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Bod/STAX
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Jun,23.2012-00:39
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Re: Old Game Cracks
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Bod/STAX
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Jun,23.2012-12:39
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Re: Old Game Cracks
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ggn
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Jun,23.2012-21:59
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Re: Old Game Cracks
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ggn
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Jun,23.2012-22:05
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Re: Old Game Cracks
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Bod/STAX
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Jun,23.2012-23:48
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Re: Old Game Cracks
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Bod/STAX
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Jun,23.2012-23:53
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Re: Old Game Cracks
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ggn
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Jun,24.2012-00:11
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Re: Old Game Cracks
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Bod/STAX
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Jun,24.2012-11:19
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Re: Old Game Cracks
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Showaddywaddy
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Jun,24.2012-11:26
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Re: Old Game Cracks
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Bod/STAX
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Jun,24.2012-12:00
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Re: Old Game Cracks
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ggn
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Jun,24.2012-12:52
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Re: Old Game Cracks
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Showaddywaddy
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Jun,24.2012-13:31
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Re: Old Game Cracks
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defjam
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Jun,24.2012-17:25
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Re: Old Game Cracks
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Bod/STAX
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Jun,24.2012-18:04
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