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Early Interrupt for Disk Controller

IP.com Disclosure Number: IPCOM000045182D
Original Publication Date: 1983-Feb-01
Included in the Prior Art Database: 2005-Feb-06

Publishing Venue


Related People

Brooks, WJ Ott, WB Pavek, DC Webb, GE [+details]


The figure shows the timing diagrams for a disk controller which execute single sector operations to a disk where the data sectors are interleaved. The operation shown is a read from data sectors 2 and 3. The disk controller hardware compares sector identifiers from the disk with the one requested until a match is found and then transfers the data. When the data transfer is complete, the next sector pulse terminates the operation and raises an interrupt to the processor. The processor handles the interrupt, processes status, and issues commands to the hardware to transfer the next data sector.