Toshiba 3006GAL 用户手册

Toshiba Corporation Digital Media Network Company

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WORD 47:

bit 15 - 8 shall be set to 80h
bit 7 - 0 Maximum number of sectors that can be transferred per interrupt on READ/WRITE MULTIPLE
commands.

The default value for this WORD is 8010h.

WORD 48: Reserved

WORD 49: Capabilities

bit 15-14

0=Reserved

bit 13

1=Standby timer value shall be as specified in ATA-/ ATAPI-6 specification

0=Standby timer value are vendor specific

bit 12

Reserved (For advanced PIO mode support)

bit 11

1=IORDY is supported.

bit 10

1=IORDY function can be disabled.

bit 9

1=LBA supported

bit 8

1=DMA supported

bit 7- 0 Reserved

The value for this WORD is 2F00h.

WORD 50: Capabilities

bit 15    0 (Fixed)
bit 14    1 (Fixed)
bit 13-1 Reserved
bit 0   1=device has a minimum Standby timer value that is device specific.

Standby timer value is set to 5 minutes or more. The value for this WORD is 4000h.

WORD 51: PIO data transfer cycle timing mode

bit 15- 8

PIO data transfer cycle timing mode

bit 7- 0

Reserved

The value returned in Bits 15-8 should fall into one of the mode 0 through mode.
Note:    For backwards compatibility with BIOS written before Word 64 was defined for advanced modes, a
device reports in Word 51 the highest original PIO mode (i.e.    PIO mode 0, 1, or 2) it can support.

The value for this WORD is 0200h.

WORD 52: Reserved

WORD 53:
bit15- 3   Reserved
bit 2

1= the fields reported in word 88 is valid

bit 1

1= the fields reported in words 64∼70 are valid

bit 0

1= the fields reported in words 54∼58 are valid

If the number of heads and sectors exceed the drive parameter, bit 0 and related WORD 54-58 shall be
cleared to 0. The default value for this WORD is 0007h.

WORD 54: Number of current cylinders defined by INITIALIZE DEVICE PARAMETERS command

WORD 55: Number of current heads defined by INITIALIZE DEVICE PARAMETERS command

WORD 56: Number of current sectors/track defined by INITIALIZE DEVICE PARAMETERS command