77. *FX lookalike
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You cannot use variables or Hex numbers in *FX calls, and they must go at the
end of a line. This Procedure performs a *FX call; you can use variables or
Hex numbers, and it can go anywhere on a line. Call it with PROCfx(a,x,y)
where a,x & y are the three normal parameters, (use zeroes if there are less
than three). Eg, *FX5,1 would be equivalent to PROCfx(5,1,0) . Note that
A%,X% & Y% are implied LOCAL variables, so will not clash if used elsewhere
in the program.
1000 DEFPROCfx(A%,X%,Y%):CALL&FFF4:ENDPROC