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A system uses one 8237A to complete the data transfer from memory to memory . The first address of the source data block is 2000H,

A system uses one 8237A to complete the data transfer from memory to memory . The first address of the source data block is 2000H, the first address in the target data block is 4000H and the data block length is 2K bytes. Write the initialization program of 8237A.

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