| 摘要 |
PURPOSE:To eliminate the need to detect switch input for every input block, by referring to a mask table and an input register, and thus detecting the switch input of every function. CONSTITUTION:A mask table 5 (5a, 5b...5i) stored in a memory consists of N- number of tables, which are used for masking functions 1, 2...N respectively. Each table has the same bit area with an input register 3, and in each table, mutually complementary pieces of binary information are written in a bit area assigned to a function corresponding to the table and other bit areas. In the register 3, the on-off state of one input switch is stored in each bit area. Consequently, register areas assigned to the functions of the tables 5 are selected through the tables 5 to detect only on-bit areas among those areas. |
