Size Optimizing Tricks in 10 PRINT Orthogonal for Commodore 64 Video

We look at a new take on the famous 10 PRINT program, which makes an orthogonal (at right angles to the screen) maze instead of the classic diagonal maze. Additionally, it's been optimized down to a 32 byte file size for entry in a competition. It turns out there are some complications with the tricks used when run on a real Commodore 64. So we dig into it to figure out what's going on and end up discussing BASIC program structure, how PRG files are stored on disk, and how real C64 RAM initializes differently than on C64 emulators.

10 PRINT orthogonal [32 bytes] by Logiker: https://csdb.dk/release/?id=201393

To support 8-Bit Show And Tell:
Become a patron: https://patreon.com/8BitShowAndTell
One-time donation: https://paypal.me/8BitShowAndTell
2nd channel: https://youtube.com/channel/UCAgWzEh5c8391eJnELDy9OA

Trick Shoot TEN by Jim Happel: https://bunsen.itch.io/trick-shoot-ten-by-jim-happel

How Animated Commodore 64 Disk Directories Work: https://youtu.be/HVMjLUhOX90

Even More Commodore 64 BASIC Optimizations: https://youtu.be/J9QH-tUJB2s

For more information about the PRG file format and more, check out Inside Commodore DOS: https://archive.org/details/Inside_Commodore_Dos_1984_Datamost_a/page/n49/mode/2up

End credits music by https://bedfordlevelexperiment.bandcamp.com/

Index:
0:00 Intro
2:15 10 PRINT orthogonal BASIC listing
4:36 Why the program won't LOAD...
8:41 Why the program can't be edited
12:03 Why the program loads at $0802
17:13 Testing our "unoptimizations"
18:23 Thanks to my patrons!

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