| 摘要 |
PURPOSE:To make the stack operation high-speed, by providing an internal stack, an internal stack pointer and an external stack pointer in an operation processing device and reducing the frequency of write to and read from a storage device, to reduce a waste of time for data transfer. CONSTITUTION:An external stack pointer 7, an internal stack pointer 8, an internal stack 9, and an internal bus 10 for connecting them are provided in an operation processing device 6. In case that a stack use request is generated during the execution of a progam, data is transferred to the stack 9 under the control of the internal stack pointer 8 if data is within the range of the capacity of the internal stack 9. If data is not within the range of the capacity of the internal stack 9, data is transferred to an external stack 12 in a form of block transfer. |
