| 摘要 |
PURPOSE:To allow a small-capacity stack to function substantially as a large- capacity stack by saving a small-capacity stack for subroutines in a main stack, and clearing a point automatically to speed up processing. CONSTITUTION:The contents of the stack MSTK3 for subroutines and a pointer register MPTR4 are saved in the main stack STK1 through a bus 12, and the contens of the stack MSTK3 and register MPTR4 are saved and loaded from the STK1 through a bus 13 by as many times as desired by utilizing the stack STK1. When the contents of the register MPTR4 cleared automatically every time the saving is performed. |
