VIRTUAL ADDRESS CONVERTER

PURPOSE:To apply the titled converter to the case of a small real storage capacity and a large virtual storage space by using a conversion table whose conversion time is short for an area of a virtual address which is used frequently, and using a real address conversion table small in size for other area. CONSTITUTION:The contents of a virtual address register 40 are inputted to a virtual address converting circuit 45 and a real address converting circuit 46, an address conversion is executed by referring to a virtual address conversion table 51 and a real address conversion table 52, respectively, and the result is sent to a selector 44. Also, a bank number part of the register 40 is compared with the contents of a bank register 41, and the result is sent to the selector 44. In case the result of comparison coincides, in case the result of conversion of the virtual address converting circuit 45 does not coincide, the result of conversion of the real address converting circuit 46 is set to a real address register 42.