| 摘要 |
A data processing system 2 has a base data address region 24 and a bit-band data address region 28 . Memory accesses to the bit-band data address region 28 are converted into memory accesses to the base data address region 24 . In the process of this conversion specific bits within the base data address region 24 are picked out for access whether that be via a read-modify-write operation or a masked read operation as appropriate. In this way, bit access is provided to data values within the base data address region 24 by addressing specific address locations within the bit-band data address region 28.
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