C64 BASIC Bouncing Pixel Inside Bouncing Sprite Optimization Challenge

Web Reference: 5 days ago · The #1 source for ALL your Commodore 64 needs. Relive the classic C64 games along with user ratings, reviews, music and an active community. Help What is a Commodore 64? In 1982, Commodore International introduced the Commodore 64 (C64), a groundbreaking home computer that remained popular until its discontinuation in 1994. Recognized by the Guinness World Records as the best-selling single computer model, independent estimates place its sales between 12.5 and 17 million units. C64 Games for nostalgic retro trolls! Our database with 9550 Commodore 64 games is made with passion and the most gentle care. We bring you very in-depth and accurate information for each game - to make sure that Lemon64 is your favourite hang out for nostalgia. By the way, Lemon64 is actually more than a games archive.

YouTube Excerpt: We've optimized the C64 BASIC bouncing ball program before, but how about optimizing a bouncing pixel ball within a sprite frame that also bounces around the screen? That's TWO things happening at once. Thanks to Eyvind for this challenge! Check out Eyvind's github for more C64 code: https://github.com/eyvindebsen CBM .prg Studio: https://www.ajordison.co.uk/ Previous episodes mentioned: "One-Line Bouncing Ball: Commodore 64 BASIC" https://youtu.be/jhQgHW2VI0o "38911 Bytes Free? Commodore 64's BASIC RAM" https://youtu.be/WZQ1FMWnG9w 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 Index: 0:00 A Facebook C64 BASIC challenge 1:24 Measuring code size, general thoughts 5:05 About optimizing for program size 7:17 Robin's V0: Line 10: the magic FN 15:17 Lines 20-30: Initializing the sprite 18:37 Lines 40-50: Main loop moving sprites 23:30 Robin's V1: Four logical lines 27:20 Line 1: V=53269, and how less lines saves memory 30:15 Line 2: Creating the sprite 34:05 Lines 3-4: The main loop 36:42 Eyvind's Final version 45:19 A few more bytes saved in both our programs 47:32 Thanks to Eyvind and my patrons!

We've optimized the C64 BASIC bouncing ball program before, but how about optimizing a bouncing pixel ball within a sprite frame that also bounces...

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