A processor based computer system having dependency checking logic and a register stack, wherein the system overrides the dependency logic such that move instructions associated with the stack registers may be executed in parallel. One mechanical path is primarily active at low speed ratios with the other path being primarily active in high speed ratios. The moving head light for stage lighting uses the angle-adjusting device to adjust the relative angles between the reflectors and the light sources so that lights sent out from the light sources generate a special effect of scaling in a space after being reflected by the reflectors. A support member supports the membrane against fluid pressure. The client is enabled to acquire sensing data in accordance with a request even if the scheme by which the sensors convey sensing data does not match with the scheme by which the client makes a request for sensing data.