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| Chapter 5 Initiator Mode |
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| Initiator |
IAD Inhibit Automatic Disconnect - If you enable SCSI disconnect privilege with the DIS bit of the General Options
0 ⇒ Determine disconnect from the DIS bit of General Options command.
1 ⇒ Ignore DIS bit, inhibit the disconnect privilege.
JSM Just Send Message - Use this bit to change the Initiator
0 ⇒
1 ⇒ Use the
This
VME Memory Address
When the SCSI operation involves a data transfer, this field contains the beginning address for the transfer. Note: transfers must be
If the SCSI command you are issuing does not require a data transfer, the adapter ignores this field and the Address Modifier field.
Transfer Count
This field determines the number of bytes that will be transferred to or from host memory. For some SCSI commands this is an indeterminate number. In that case, there are two ways to use this field:
1.You can place a value in the field to represent the maximum number of bytes the adapter may transfer. Then, if the target attempts to transfer more data than this, the adapter will discontinue the operation and return a Status Block.
2.Alternately, you could place a zero value in this field. This causes the adapter to continue to accept data transfer requests from the target until command is complete.
SCSI Command Descriptor Block
These 12 bytes of the Initiator
SCSI commands may be 6, 10, or 12 bytes in length. Any of the 12 bytes reserved for the SCSI command that are unused are ignored. The SCSI command block is passed to the SCSI device exactly as presented. The RF3880 adapter doesn’t alter any of the fields you set up.
21020285 D | User’s Guide |