| 摘要 |
PURPOSE: To access a memory, where data is stored in a form different from the data form in which a CPU can directly access data, without intervention of software processing. CONSTITUTION: When a CPU 1 outputs an access request, an access request control means 2 judges whether it is a read request or a write request. If it is a read request, a data input/output control means 4 reads data from a pertinent address in a memory 5 byte by byte. This data is subjected to Endian conversion and is stored in a data storage means 3. The CPU 1 reads data in the data storage means 3 as big Endian data. If the access request from the CPU 1 is a write request, big Endian data outputted from the CPU 1 is stored in the data storage means 3. The data input/output control means 4 writes this data in the memory 5 byte by byte while subjecting it to Endian conversion. |
