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BASIC Experiments

  • ScrollyBitmap.basic
    • Randomly draws stars which scroll by on the screen
    • Known issues:
      • Running SuperBASIC 04/04/23_01b with the memory expander cart inserted:
        • Sporadically, the program will fail after some amount of time. Either the program will halt completely, or it will declare a syntax error on the line:
          1101  memcopy $10001 rect 319,240 by 320 to $10000
          
          I am hoping this is just a rare timing issue on the specified SuperBASIC version.
  • SimplerTest
    • Similar to ScrollyBitmap.basic, but with less code. Meant to test the sporadic error mentioned previously.
  • Streaker
    • Even simpler, removing the randomness
  • Ribbon
    • Same as previous, but using a smaller block of memory to memcopy

Inline Assembly Experiments

  • DMAScreenFlashLoop
    • It seems that after being called a random number of times, this inline assembled routine locks up the system. I'm not sure if I have a bug, or if it's a manifestation of the memcopy issues above.