Datasheet

13.5.12 Read DMA(C8h/C9h)
...See Below...StatusR0010011Command
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-V0V0V0V0V0VV
ERRIDXCORDRQDSCDFRDYBSYAMNT0NABT0IDN0UNCBBK
0123456701234567
Status RegisterError Register
Figure 87. Read DMA Command (C8h/C9h)
The Read DMA 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.
The host initializes a slave-DMA channel prior to issuing the command. The data transfers are qualified
by DMARQ and are performed by the slave-DMA channel. The device issues only one interrupt per
command to indicate that data transfer has terminated and status is available.
If an uncorrectable error occurs, the read will be terminated at the failing sector.
Hard disk drive specification for DSCM-11000/-10512/-10340
103