| 摘要 |
PURPOSE:To reduce a time required for stack processing by reading out the data of a stack to be designated by a pointer when a corresponding table is made effective, and making ineffective a data management table in the correspondent stack when the data are coincident with desired data. CONSTITUTION:A reading means 7 compares the desired data with the data of a stack 1 shown by a pointer 6. The comparison with the desired data is executed to the data in a stack area sandwiched between a stack pointer 4 and a stack base pointer 2 and further, the comparison is executed only to the data made effective in a data in stack management table 3. As the result of the comparison by the reading means 7, when the desired data are coincident with the data in the stack 1, the reading means 7 makes ineffective the table of the data in stack management table 3 corresponding to the coincident data. Thus, when the stack 1 is used for painting-out, etc., a graphic, the time required for stack processing is reduced. |
