| 摘要 |
PURPOSE:To decrease the overhead due to the change in the table by providing a converting register, a key register and a load table and changing two tables by one instruction operation. CONSTITUTION:When an address conversion is executed by a converting register TR 1, a logical address line 7 is selected by a selector 4, the inputted logical address is given to an address designating circuit 1a of the TR 1 and an actual address is read from the corresponding entry to a register 6. When a key register KR 2 is prepared, the KR 2 is simultaneously prepared when the TR 1 is prepared. WHen a load table LT instruction is executed and one entry is written into the TR 1, an actual address part, part of the data, is given through an actual address line 9 and a selector 5 to an address designating circuit 2a of the KR 2. Simultaneously, a key part, which goes to be a pair with the actual address part of the data, is inputted through a key line 10 to KR 2. Thus, respective entries of the KR 2 are written in accordance with the actual address given to the address designating circuit 2a.
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