作者: Hitoshi Ogata
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摘要: A computer system comprises a microcomputer and external memory means in communication with the for storing various programs items of data. The nonerasable ROM having stored therein basic program data indispensable to operation system, RAM or kinds data, CPU executing processing an interface circuit providing communications devices. has modification modifying portion contained program, starting address indicating location where by is be started. interrupt function at predetermined address. modifies transferring from RAM, as address, command jump head interrupt.