| 摘要 |
PROBLEM TO BE SOLVED: To provide an information processor capable of coping with increase in the number of interruption factors and maintaining the acceleration of interruption processing even though a CPU with a small number of interruption factor inputs is used. SOLUTION: Interruption request signals IR<SB>0</SB>to IR<SB>m-1</SB>are given to the CPU 8 and interruption request signals IR<SB>m</SB>to IR<SB>m+n</SB>are given to an interruption expanding means 12. When receiving an interruption request, the interruption expanding means 12 generates a value (interruption vector number) of an operand part of an INT instruction needed for corresponding interruption processing by an instruction generating mean 16, rewrites the value of an operand part of an INT instruction held by a storing means 17 with the generated value and makes an interruption request to the CPU 8. When receiving an interruption request from the instruction generating means 16, the CPU 8 executes the INT instruction held by the storing means 17 to perform interruption processing. COPYRIGHT: (C)2007,JPO&INPIT
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