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FOR LOOP repeating #178

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FOR LOOP repeating#178
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boriel
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featureFeature request

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@em00k
em00k
opened on Oct 9, 2018

I find this for loop repeats, only happens if to is set to 255

for x = 0 to 255 
	print at 0,0;x
	pause 1
next x 
pause 0

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  1. boriel
    added a commit that references this issue on Nov 13, 2018

    Merged in bugfix/div32 (pull request #178)

    1e27377

  3. em00k commented on Jan 19, 2021

    @em00k
    em00k
    on Jan 19, 2021
    Author

    Sorry ignore my last post on this.

  4. boriel
    self-assigned this
    on Nov 3, 2024
  5. boriel
    added
    featureFeature request
    on Nov 3, 2024

  6. boriel commented on Nov 3, 2024

    @boriel
    boriel
    on Nov 3, 2024
    Collaborator

    I've been thinking of an alternate (and efficient) way to implement this, by using Carry Flag (at least for 8 bits variables).
    Maybe in the near future I could come up with a better solution.
    In the mean time, the loop above can be rewritten as:

    Dim x as UByte
Let x = 0
Do
  Print At 0, 0; x
  Pause 1
  Let x = x + 1
Loop Until x = 0  : REM yes, overflow

  7. boriel commented on Nov 28, 2024

    @boriel
    boriel
    on Nov 28, 2024
    Collaborator

    Alternatively, the initial FOR loop will cause the Z80's Carry Flag to be set. Maybe I can take advantage of this and detect the FOR loop ending!

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