| 摘要 |
A direct memory access controller, such as for a disk, includes address registers containing beginning and end addresses defining a transfer area of a disk, a location counter which points to a specific location which is being accessed in the transfer area, updating circuitry to set the location counter to the initial address after the location corresponding to the end address has been accessed, and termination circuitry for disabling the location counter when all of the memory locations of the transfer area have been accessed. The address initially loaded into the location counter is for the location which can be accessed most quickly by the direct memory access controller.
|
