Read Descriptor Mode (3); Table 19-4: Read Buffer Descriptor List - Tandberg Data SLR7-140 PROGRAMMER Manual

BYTE BIT 7
00 Offset Boundary
01 Buffer Capacity
02
03
Offset Boundary
Buffer Capacity
Tandberg Data

19.4. Read Descriptor Mode (3)

In this mode, a maximum of four bytes of READ BUFFER
descriptor information
return the descriptor
specified by the Buffer ID (see the description of the
Buffer ID in Section 19.3). The Drive will return all
zeros in the READ BUFFER descriptor if there is no
buffer associated
Buffer Offset
Allocation Length should be set to four or greater. The
Drive will transfer the lesser of the Allocation Length
or four bytes of READ BUFFER descriptor.
6 5
Table 19-4: READ BUFFER Descriptor List
There are two possible values for the Offset Boundary;
0h and FFh. When the Offset Boundary field is zero the
buffer offset
block can be on any byte boundary.
When the Offset Boundary field is FFh the buffer offset
in the READ BUFFER
applicable and must be 0. (This occurs only when Buffer
Id 2 - Media Statistic is selected.)
The value in the Buffer Capacity field depends on the
Buffer ID:
19-5 Tandberg SLR Product Line SCSI Functional Specifications
is returned.
information
with the specified
field is reserved
4 3
in the READ BUFFER
command descriptor
Read Buffer
The Drive
for the buffer
Buffer ID.
in this mode.
2 1 0
command descriptor
block is
will
The
The
not