04-262r8a: ATA Command Pass-Through March 1, 2005
Page 2
Revision History
Date Revision Description
11-Aug-04 0 Initial Revision
13-Aug-04 1
Added 5 bit protocol field.
Added direction. Although this is in the wrapper, some people felt
that the information from the wrapper may not be available at all
levels.
Removed statements indicating that queuing is not supported by this
proposal. The addition of the protocol field allows the host to perform
ATA queuing functions
16-Aug-04 2
Added a disclaimer about SET FEATURES changing operational
modes
Added statements to make it more clear that the Bridge owns the
data transfer configuration of the ATA device.
Changes terms to be SCSI standard
1-Sep-04 3
Added revision history. This was omitted from previous versions of
the doc. I have also added the history for versions 0-2.
Turned off change-bars, they were interfering with the document
restructure.
Added control byte to CDB’s. This required a restructure of the 16-
byte CDB flags.
Removed DMA and DIR flags as a result of #3.
Changed Protocol field to 4 bits as a result of #3.
Removed the no protocol specified field to free up a protocol number.
Made grammatical changes requested at the SAT WG
Removed the D.EN bit. All commands are defined to use the device
register since it has the DEV bit for selecting a target device for the
command.
Added a CC bit to allow the host to force a CHECK CONDITION at
command completion. This is needed to prevent registers from being
lost when a command completes successfully.
Updated overview diagram to indicate a host.
Deleted tables that documented request sense and sense data
returns. These were causing confusion. The ATA sense data
descriptors now follow documentation standards more closely.
Reduced the size of the O
FF_LINE field and changed the formula to
give a similar range, but with fewer intermediate values.
Changed more terms to match SCSI usage.
Added a section on Inquiry that limits this proposal to peripheral
device types 00h (SBC-2) and 0Eh (RBC).
Removed the section on field representation.
2-Sep-04 4
Fixed some references in the revision history for revision 3.
Removed the reference to packet protocol from the ATA Protocol
Table since this proposal does not support ATAPI.
Modified definition of terms to only include new terms. Also added
definitions of Host and Translator.
Modified definition of Bridge.
Added transfer length capability for both 12 and 16 bit CDB’s
15-Oct-04 5
Fixed the Extend Bit in table 3.
Fixed offset reference numbers in 4.1.4.
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