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Checksums -- making games safer to type in from magazines since the 70s

time2 yr agoview91 views

In the early days of home computers, software was small enough to be distributed in the backs of computer magazines. Bamboo gives a quick rundown of his experiences with this method of software distribution.

Thanks to Tyrel (@tyrelsouza), Jim K. (@ijimkoz), J3!

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References

  • Type-in Program article on Wikipedia (https://en.wikipedia.org/wiki/Type-in_program)
  • Checksum article on Wikipedia (https://en.wikipedia.org/wiki/Checksum)
  • Compute!'s Gazette Issue 36 (https://archive.org/details/1986-06-computegazette/mode/2up) The issue I showed off in the video.
  • Public Domain Commodore example programs (https://rittwage.com/c64pp/?pg=pd) bagel.c3 is on games_i.zip
  • hello.dasm on 8 Bit Workshop (https://8bitworkshop.com/v3.9.0/?file=hello.dasm&platform=c64) Remove the scanline code and you can get this down to 37 bytes compiled.
  • hello.c (https://gist.github.com/johnbintz/dfa1724f6e5ca2f59633b608934644cc) The file I used to make the MS-DOS and Linux binaries
  • Bruce's C Compiler (https://linux.die.net/man/1/bcc) Used to build MS-DOS COM file for file size

Credits

  • Cipher by Kevin MacLeod https://incompetech.com/music/royalty-free/music.html CC-BY 4.0 You have to search for this one, I couldn't find a direct link.
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