NAME
    WaitBOVP -- Wait till vertical beam reached bottom of
                this viewport.

SYNOPSIS
    WaitBOVP( vp )
              a0

    void WaitBOVP( struct viewport * );

FUNCTION
    Returns when the vertical beam has reached the bottom of this viewport

INPUTS
    vp - pointer to viewport structure

RESULT
    This function will return sometime after the beam gets beyond
    the bottom of the viewport.  Depending on the multitasking load
    of the system, the actual beam position may be different than
    what would be expected in a lightly loaded system.

BUGS
    Horrors! This function currently busy waits waiting for the
    beam to get to the right place.  It should use the copper
    interrupt to trigger and send signals like waittof does.

SEE ALSO
    waittof() vbeampos()