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In clause "5.15 Signature and persistence" and the sub-clauses, the value in the Device register should be changed...
In 5.15.1
00h should be changed to y0y00000b (where y is obsolete)
In 5.15.2
000x0000b should be changed to y0yx0000b (where y is obsolete)
Yes, it would be nice if all devices set the 'y' bits to 0 but there is lot of hardware out there (old and new) that have these bits hard-wired to 1 (ATA tradition).
Hale
