question about ATA Bus Master（first party DMA）

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Q1. how could I know whether an "ATA Bus Master" support "MultiWord DMA" or "Ultra DMA" ? I've not seen related description on official SPEC or Google.
Q2. how to use bit5(Device 1 DMA Capable) and bit6(Device 0 DMA Capable) in "ATA Bus Master Status Register" ? Did it respect whether the actual Device(HDD or CD) attached to corresponding ATA HBA port ?

Thanks advance.