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If it won’t fit, put the attach packet parameters offset into the error field in the
command table (byte offset $72), and return a command error status in the user
packet.
Send mode select command.
Mode sense for FORMAT PARAMETER PAGE 4 current values.
If no illegal request error
Mode sense for page 4 changeable values.
If any of the previous mode sense commands returned a "Illegal Request" error
status, this next step is skipped (mode sense and mode select are optional). If
the previous commands were successful, a mode select command and
parameter list is prepared.
If the attach packet value does not match the mode sense value, and if the
changeable value is not zero (some bits are changeable), try to put the attach
packet value into the field using the changeable mask.
If it won’t fit, put the attach packet parameters offset into the error field in the
command table (byte offset $72), and return a command error status in the user
packet.
in -2 Send mode select command.
Mode sense for FORMAT PARAMETER PAGE 1 current values.
If no illegal request error
Mode sense for page 1 changeable values.
If any of the previous mode sense commands returned a "Illegal Request" error
status, this next step is skipped (mode sense and mode select are optional). If
the previous commands were successful, a mode select command and
parameter list is prepared.
If the attach packet retry count is zero (diagnostic mode), and if the changeable
value is not zero (some bits are changeable), try to disable corrections, and set
retry count to 0 using the changeable mask.
If it won’t fit, put the attach packets parameters offset into the error field in the
command table (byte offset $72), and return a command error status in the user
packet.
Send mode select command.