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Bitfields for Phoenix Enhanced Disk Drive Spec drive options

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Bit Description

0

fast PIO enabled

1

fast DMA access enabled

2

block PIO (multi-sector transfers) enabled

3

CHS translation enabled

4

LBA translation enabled

5

removable media

6

ATAPI device (CD-ROM)

7

32-bit transfer mode

---v1.1+---

8

ATAPI device uses DRQ to signal readiness for packet command (must be 0 if bit 6 is 0)

10 - 9

translation type (must be 00 if bit 3 is 0)
00 Phoenix bit-shifting translation
01 LBA-assisted translation
10 reserved
11 proprietary translation

---v3.0---

11

Ultra DMA access enabled

15 - 12

reserved (0)

See Also:

#00278,#00279