From Wikipedia: "The BANCStar 10.0 release changed the "Screen Code" format to binary, and rearranged the numeric codes into an opcode with a variable number of

From Wikipedia: "The BANCStar 10.0 release changed the "Screen Code" format to binary, and rearranged the numeric codes into an opcode with a variable number of parameter integers. The 10.0 opcode encoded a bit mapped length value that indicated the length of the command in words."