| 摘要 |
PURPOSE:To prevent the deterioration in the performance due to the increase in access to a memory, by registering a revised bit unconditionally with nonupdate display without memory access at the readout access index mistake in an address conversion buffer (TLB). CONSTITUTION:An address conversion control section 9 accesses a main memory access control section 10d for converting the address so as to read the address conversion table of a main memory based on a logical page address section (LPA and LEA) of a register 14, sets the real address information as the result to a TLB registration register 11, when the TLB index mistake is detected, and sets ''0'' to the copy registration register 12 of the update bit when an R flag 2 is ''1''. Further, when an S flag 3 is ''1'', ''1'' is set to the register 12 to be registered in one of the TLB5 and 6. When the S flag 3 is ''1'' in this case, a ''1'' set request signal of the update bit in the main memory is transmitted to the control section 10 to guarantee the coincidence with the copy of the update bit in the TLB5 and 6. |
