| 摘要 |
<p>PURPOSE:To eliminate the need for performing the interruption processing of other processor, and to quickly respond to plural interruption causes by providing an address control means which loads address data to be received at an input/output port to a program counter according to an interruption response for an interruption request. CONSTITUTION:At first, a chip select deciding means 42 outputs the interruption request 44 to its own machine according to chip select data to be received at the input/output port 40 in an input mode or by a control signal to be inputted directly to the chip select deciding means 42. Then, after waiting for the interruption response 45, the address control means 30 loads the 8-bits address data of the input/output port 40 as low-order address data to the program counter 31 according to index designation, and acts so as to transfer the control of the processor to this address. Thus, the unnecessary interruption of the program due to the interruption processing from other processor is removed, and it becomes possible to respond to the unrestricted interruption request quickly.</p> |
