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M2488 PRODUCT GUIDE TAPE UNIT SCSI COMMANDS
April 1997 CG00000-011503 REV. A 4-9
4-3.3.2 Display Data (11h)
The 17 bytes of DISPLAY data consists of a format control byte followed by two eight-byte mes-
sages. See Table 4-6, Table 4-7 and Table 4-8 on page 4-10. If the Parameter List Length is set to
0 no action is performed and it is not considered an error.
Table 4-6. DISPLAY Parameter (11h)
BITS
BYTES 7 6 5 4 3 2 1 0
0
Display Mode Selection
Display
Length
Flash Half Msg 0 Data Format
1-8
First Half Message
9-16
Second Half Message
Note: All bytes should not be set to spaces, because this would appear as a MTU powered down state.
Table 4-7. Display Parameter Field Description (11h)
BYTE BIT VALUE DESCRIPTION
0 0
1
0
The Data Format bit describes the type of data contained in bytes 1 through 16.
If this bit is set to 1, the data in bytes 1 through 16 is considered to be ASCII format.
If bit is 0, the data is EBCDIC format.
0 2
0
1
The Half Msg bit selects which half of the message is to be displayed. This bit is valid
only when the Display length bit is set to zero.
When the Half Msg bit is set to zero, the first half of the message (bytes 1 to 8) is dis-
played.
When the Half Msg bit is set to one, the second half of the message (bytes 9 to 16) is
displayed.
0 3 0
1
When the Flash bit is set to zero, the display does not flash.
A Flash bit set to one causes the display to flash.
0 4 0
1
When the Display Length bit is set to zero, only 8 bytes are displayed. Whether bytes 1
to 8 or bytes 9 to 16 are displayed is selected by bit 2. If bit 2 is set to 0b then bytes 1
through 8 are displayed. If bit 2 is set to 1b bytes 9 to 16 are displayed.
When the display length bit is set to one, bytes 1 to 8 and bytes 9 to 16 are displayed
alternately. Bits 2-3 are ignored for this selection.
0 5-7 Table 4-9 defines the Display Mode Selection bits.
1-16 The message bytes contain the data to be displayed.