Table of Contents
Advertisement
13.16 Read Native Max ADDRESS (F8h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7
6
5
CRC
UNC
0
0
0
0
Figure 101. Read Native Max ADDRESS (F8h)
This command returns the native max LBA/CYL of the drive which is not effected by the Set Max
ADDRESS command. Even if the Address Offset mode is enabled, the native max LBA/CYL is returned.
Output parameters to the device
L
D
-
Input parameters from the device
Sector Number
Cylinder High/Low
H
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 L 1 D - - - -
1 1 1 1 1 0 0 0
4
3
2
1
IDN
0
ABT
T0N
0
0
V
0
LBA mode. This indicates the addressing mode. L = 0 specifies CHS mode and L
= 1 specifies the LBA addressing mode.
This is the device number bit. Indicates that the device number bit of the
Device/Head Register should be specified. D = 0 selects the master device and D
= 1 selects the slave device.
Indicates that the bit is not used.
In LBA mode this register contains the native max LBA bits 0–7. (L = 1)
In CHS mode this register contains the native max sector number. (L = 0)
In LBA mode this register contains the native max LBA bits 8–15 (Low) and bits
16–23 (High). (L = 1)
In CHS mode this register contains the native max cylinder number. (L = 0)
In LBA mode this register contains the native max LBA bits 24–27. (L = 1) In CHS
mode this register contains the native maximum head number. (L = 0)
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0
7
6
AMN
BSY
RDY
DF
0
0
V
141
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
- - - - H H H H
see below
5
4
3
2
1
DSC
DRQ
COR
IDX
0
-
-
0
-
0
ERR
V
Hide quick links:
Advertisement
Table of Contents
