(Comp.sys.handhelds)
Item: 3600 by mike at drd.com
Author: [Mike Rovak]
  Subj: HP48 gravity game refinement
  Date: Fri Jun 28 1991

To prevent pixels from bunching up at the top or left line of the screen
when absolute pixel coordinates go negative, modify variable DRAWXY to
test for this like so:

%%HP: T(3)A(D)F(.);
\<<
    IF XM 0 < YM 0 < OR NOT
    THEN XM R\->B YM R\->B 2 \->LIST PIXON
    END
\>>

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