Code 7 sets the graphics display mask. This operation is not supported by HTBasic. The param array must be a one dimensional INTEGER array, and must have at least one element. The first element is assigned to the graphics write-enable mask. The second element, if present, is assigned to the graphics display-enable mask.
A_param(0) - graphics write enable mask
A_param(1) - graphics display enable mask
The following program shows how to set the graphics enable masks.
