RevMedia

A discussion with RevTech identified the fact that VIDEO.RW is actually not a subroutine but a function and returns a value reflecting the success of the last operation. Thus far, the following codes have been identified (where calling syntax is RESULT = VIDEO.RW(X1, Y1, X2, Y2, ACTION, IMAGE))

  Code    Meaning
   0      OK
   1      Out of memory during read attempt
   2      Display not memory mapped (historical from Generic Rev days)
   3      X1/X2/Y1/Y2 too small, X2/Y2 too big
   4      X1/Y1 too big
   5      Invalid ACTION
   6      IMAGE doesn't fit (too big/small)