sscurs
SSCURS(mode.i2.r, ix.i2.r, iy.i2.r)
This routine is used to enable, update, and disable trackball movement
of the storage scope cursor. To enable the storage scope cursor, call
SSCURS with MODE = 0. The storage scope cursor will be turned on and
set to coordinates (IX,IY). Trackball movement of the color TV cursor
will be disabled. SSCURS should then be called at 15 Hz with MODE = 1
to update the storage scope position. The coordinates of the current
storage scope position will be returned in IX and IY. To terminate
storage scope cursor mode, call SSCURS with MODE = 2.