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Verify CRC Packet
7-51
7
Verify CRC Packet
The verify Cyclic Redundancy Character (CRC) command ($13) instructs the
controller to read the specified number of blocks and check the CRC of each
block. The verify begins at the current tape position and the tape is left
positioned at the end of the last block verified. No data is transferred to the
MVME147 during this operation.
Note
The controller must be in general or read mode.
The table below shows the verify CRC packet.
Even Byte \
Odd Byte \
FC B8 74 30
+$00 Controller LUN Device LUN
+$02 Status Byte 0 Status Byte 1 (Note 1)
+$04 Number of Blocks (MSW)
+$06 Number of Blocks (LSW)
+$08 0000
+$0A 0000
+$0C 0000
+$0E 0000
+$10 0000
+$12 0000
+$14 0 0 Function Code (40)
+$16 Interrupt Level Vector Number
+$18 Status Byte 2 Status Byte 3 (Note 1)
$00 00000xxx Controller logical unit
number
$01 00000xxx Device logical unit
number