Topaz breaks down The New Automatic Proofreader, a tool used to verify C64 BASIC code was copied correctly out of Compute!’s Gazette magazines.

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

References

• The New Automatic Proofreader in Compute!’s Gazette Issue 32 (https://archive.org/details/1986-02-computegazette/page/n109/mode/2up)
• The decompiled machine language code with comments (https://code.hackerbun.dev/TheIndustriousRabbit/the-automatic-proofreader-decompiled)
• The CRUNCH routine, which gets called after The Automatic Proofreadaer does its work (https://techwithdave.davevw.com/2020/08/commodore-64-basic-crunch-routine.html)
• TXTTAB, the memory address that holds the start of new BASIC code (https://www.c64-wiki.com/wiki/43-44)
• da65 (https://www.cc65.org/doc/da65.html)
  • The da65 6502 disassembler
• radare2 (https://rada.re/n/radare2.html)
  • The radare2 disassembler

Credits

• Explosion by FlashTrauma
  • https://freesound.org/people/FlashTrauma/sounds/398283/
  • CC0
• Presenterator by Kevin MacLeod
  • https://incompetech.filmmusic.io/song/4238-presenterator
  • CC-BY 4.0

Changelog

• 2023-07-21: Move to MakerTube.