COPYING CONTROL DEVICE

PURPOSE:To shorten a software development designing period and a software debugging period and to improve the reliability of software by forming a subroutine control table. CONSTITUTION:The titled device consists of a main routine 1, a subroutine group 2, a subroutine control table 3, and a priority determining register 4. After turning on a power supply, a stack pointer is set up at first, the whole area of a RAM constituting the priority determining register 4 is cleared, and after setting up the register, the execution of the control table 3 is specified from its head. In the succeeding step, AND between the register and the status is found out, and if the result is ''0'', the operation is backed. When the result is not ''0'', the operation is branched to the subroutine. Thus, the priority in the execution speed of the subroutine is defined on the control table 3 in each subroutine, so that the operation to be executed accurately can be selectively controlled.