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SCSI Bus Reset Packet
7-39
7
SCSI Bus Reset Packet
This function activates the RST* (RESET) line on the SCSI bus (hardware reset).
All devices on the bus are reset and any commands that were pending are
terminated.
The SCSI firmware cleans up internal flags and the status returned to the user
is "command complete" ($00). All outstanding packets are returned with a
"reset status" ($0A). Because all of the attach table entries are cleared after this
command, the next command for any device should be an "attach".
The following table shows the details of a SCSI bus reset/SCSI controller reset
packet.
Even Byte \
Odd Byte \
2. N entries (ascending order).
3. Filled in by SCSI firmware if
needed.
4. 2N entries.
5. 4N number of bytes.
FC B8 74 30
+$00 Controller LUN 0 0
+$02 Status Byte 0 Status Byte 1 (Note 1)
+$04 0000
+$06 0000
+$08 0000
+$0A 0000
+$0C 0000
+$0E 0000
+$10 0000
+$12 0000
+$14 0 0 Function Code (20, 24)
+$16 Interrupt Level Vector Number
+$18 Status Byte 2 Status Byte 3 (Note 1)