WORD 66: Manufacturer recommended multiword DMA transfer cycle time

If the data transfer is requested in a shorter cycle time than this definition, the data transfer may be kept pending with DMARQ low because data is not ready. The value for this WORD is 0078h (120ns).

WORD 67: Minimum PIO transfer cycle time without flow control (ns)

The Drive can guarantee correct data transfer without flow control in this cycle time or longer. If this bit is supported, word 53 bit 1 is to be set. The drives which support PIO mode 3 or higher shall support this field too. This figure shall not be less than 120. The value for this WORD is 0078h (120ns).

WORD 68: Minimum PIO transfer cycle time with IORDY flow control (ns)

If this bit is supported, word 53 bit 1 is to be set. The drive that support PIO mode 3 or higher shall support this field too. This figure shall not be less than 120. The value for this WORD is 0078h (120ns).

WORD 69-79: Reserved

WORD 80: Major version number

If not 0000h or FFFFh, the device claims compliance with the major version(s) as indicated by bits 1 - 6 being equal to one. Values other than 0000h and FFFFh are bit significant. Since the ATA standards maintain downward compatibility, a device may set more than one bit .

WORD 81: Minor version number

If an implementor claims that the revision of the standard they used to guide their implementation does not need to be reported or if the implementation was based upon a standard prior to this revision of the standard, Word 81 shall be 0000h or FFFFh.

WORD 82: Command sets supported

bit 15

Reserved

bit 14

NOP command supported

bit 13

READ BUFFER command supported

bit 12

WRITE BUFFER command supported

bit 11

Reserved

bit 10

Host Protected Area feature set supported

bit 9

DEVICE RESET command supported

bit 8

SERVICE interrupt supported

bit 7

Release Interrupt supported

bit 6

Look Ahead supported

bit 5

Write Cache supported

bit 4

PACKET feature set supported

bit 3

The Power Management feature set is supported

bit 2

The Removable feature set is supported

bit 1

The security feature set is supported

bit 0

The SMART feature set is supported

The value for this WORD is 746Bh.

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