This page (revision-22) was last changed on 03-Feb-2023 15:21 by Gromit 

This page was created on 14-Mar-2010 18:17 by Carsten Strotmann

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The UNTIL at the end of the loop serves the same purpose as the WHILE described earlier. The only difference is that an UNTIL loop repeats as long as the condition is false (the inverse of WHILE). That's why [CH] is tested to not equal 255 (inverse of equal in WHILE).
Those of you who have an Action! cartridge should try this program. It's very small and easy to enter. The first thing you'll notice is that it doesn't run especially fast, This is mainly due to the fact that it is using the Atari operating system's PLOT subroutine. In Part II of this series, I' ll discuss some things you can do to speed it up. You may a!so wish ~[....] the best looking patterns.