| 摘要 |
PURPOSE:To obtain a byte code emulator which works at a high speed with high performance by providing a circuit which performs the control of generation of an interruption to a microprocessor as well as the replacement control of the 1st register in response to the value of the 2nd register when a reading request is given for the 1st register. CONSTITUTION:A register 200 is initialized by performing the writing to an address F0002 from a program and an address F0004 is read out. Thus a selection circuit 290 selects the output of the register 200 for read-out of the data which store the contents of the register 200 in a memory. When an interruption factor is produced, the data with which the bit corresponding to the interruption factor is set at '1' is written to an address F0000 by a program. Then the value is set to a register 210. When a read request is given to the address F0004 for read-out of byte codes, an interruption generating circuit 280 sends an interruption signal to a microprocessor to shift the control to an interruption processing program of a byte code emulator.
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