Fujitsu MJA2500BH Maintenance Manual - Page 94
Shadow Register Block., Cyl Low exp
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Interface FIS Type - Set to a value of 5Fh. Defines the rest of the FIS fields. Defines the length of the FIS as five Dwords. Cyl Low - Holds the contents of the cylinder low register of the Command Block. Cyl Low (exp) - Contains the contents of the expanded address field of the Shadow Register Block. Cyl High - Holds the contents of the cylinder high register of the Command Block. Cyl High (exp) - Contains the contents of the expanded address field of the Shadow Register Block. D - Indicates whether host memory is being written or read by the device. 1 = write (device to host), 0 = read (host to device). Dev / Head - Holds the contents of the device / head register of the Command Block. Dev / Head (exp) - Contains the contents of the expanded address field of the Shadow Register Block. E_Status - Contains the new value of the status register of the task file block for correct synchronization of data transfers to host. Error - Contains the new value of the Error register of the Command Block at the conclusion of all subsequent Data to Device frames. I - Interrupt bit. This bit reflects the interrupt bit line of the device. R - Reserved (0) Sector Count - Holds the contents of the sector count register of the Command Block. Sector Count (exp) - Contains the contents of the expanded address field of the Shadow Register Block. Sector Number - Holds the contents of the sector number register of the Command Block. Sector Num (exp) - Contains the contents of the expanded address field of the Shadow Register Block. Status - Contains the new value of the status register of the Command Block at the conclusion of all subsequent PIO Data to Device frames. Transfer Count - Holds the number of bytes to be transferred in the subsequent data FIS. 5-20 C141-E293