Datasheet

The head number of the last transferred sector. (L=0)
LBA mode, this register contains current LBA bits 24 - 27. (L=1)
H
The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8-15 (Low), 16-23 (High).
(L=1)
Cylinder High/Low
The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 - 7. (L=1)
Sector Number
The number of requested sectors not transferred. This will be zero, unless an
unrecoverable error occurs.
Sector Count
Input Parameters From The Device
13.5.15 Read Sectors (20h/21h)
...See Below...StatusR0000100Command
HHHH----Device/HeadHHHHD1L1Device/Head
VVVVVVVVCylinder HighVVVVVVVVCylinder High
VVVVVVVVCylinder LowVVVVVVVVCylinder Low
VVVVVVVVSector NumberVVVVVVVVSector Number
VVVVVVVVSector CountVVVVVVVVSector Count
...See Below...Error--------Feature
--------Data--------Data
01234567Register01234567Register
Command Block Input RegistersCommand Block Output Registers
V00-V0V0V0V0V0V0
ERRIDXCORDRQDSCDFRDYBSYAMNT0NABT0IDN0UNCBBK
0123456701234567
Status RegisterError Register
Figure 90. Read Sectors Command (20h/21h)
The Read Sectors command reads one or more sectors of data from disk media, then transfers the data
from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time.
If an uncorrectable error occurs, the read will be terminated at the failing sector.
Hard disk drive specification for DSCM-11000/-10512/-10340
108