User`s manual

SIOP Firmware Structures
B-12 Single Board Computers SCSI Software UserÕs Manual
B
Message-In Buffer Pointer
This field may be modified by the Firmware.
initiator mode
If the MIBUF bit is set, the message-in buffer pointer field contains the starting
address where a message from the target is to be stored. It is recommended to
not set the MIBUF in the command control field for normal operation; this
feature of the Firmware is intended to be used for very long extended
messages. If the MIBUF bit is cleared, this field is initialized by the Firmware.
This field is updated by the Firmware as (extended message) message bytes
are received.
Message-In Bytes (0-B)
This field may be modified by the Firmware.
initiator mode
The message-in bytes are where (extended message) message bytes from a
target are stored if the MIBUF bit in the command control field is cleared.
Message-Out Length
This field may be modified by the Firmware.
initiator mode
If the MOBUF bit is set, this field contains the length of the message, in bytes,
the initiator sends during a message-out phase. Usually, the user does not
need to supply any messages to send to the target.