Verify CRC Packet | 7 |
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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 |
|
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+$00 |
|
| Controller LUN |
| Device LUN | ||
|
|
|
|
| |||
+$02 |
|
| Status Byte 0 | Status Byte 1 (Note 1) | |||
|
|
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| |
+$04 |
|
|
| Number of Blocks (MSW) | |||
|
|
|
|
| |||
+$06 |
|
|
| Number of Blocks (LSW) | |||
|
|
|
|
|
|
| |
+$08 |
| 0 |
| 0 | 0 |
| 0 |
|
|
|
|
|
|
|
|
+$0A |
| 0 |
| 0 | 0 |
| 0 |
|
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|
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|
|
|
+$0C |
| 0 |
| 0 | 0 |
| 0 |
|
|
|
|
|
|
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|
+$0E |
| 0 |
| 0 | 0 |
| 0 |
|
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|
|
+$10 |
| 0 |
| 0 | 0 |
| 0 |
|
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|
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|
+$12 |
| 0 |
| 0 | 0 |
| 0 |
|
|
|
|
|
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| |
+$14 |
| 0 |
| 0 | Function Code (40) | ||
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+$16 |
|
| Interrupt Level |
| Vector Number | ||
|
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| |||
+$18 |
|
| Status Byte 2 | Status Byte 3 (Note 1) | |||
|
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$00 |
| 00000xxx |
| Controller logical unit | |||
|
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| number | |
$01 |
| 00000xxx |
| Device logical unit | |||
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| number | |
