| 摘要 |
PURPOSE:To realize the interruption processing with high efficiency without saving the unnecessary contents of a register by making the saving quantity of an internal register variable by the hardware interruption and the software interruption. CONSTITUTION:A firmware is operated as the medium of software and hardware with respect to each input/output device of a CRT16, KB17, FDD18, etc. That is to say, the hardware interruption generated after processing by each input/output device is ended is controlled by firmware. Therefore, when a work instructed by the software is ended, it is informed to the software by means of interruption. In such a case, this system is constituted so that the part of contents of all general registers and a base register, and only a part of the general register and the base register are saved by the software interruption and the hardware interruption, respectively, and the saving quantity of the register is made variable.
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