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12.63 Write Buffer DMA (EBh)
The Write Buffer DMA command transfers a sector of data from the host to the sector buffer of the device. The sectors
of data are transferred through the Data Register 16 bits at a time.
The Read Buffer and Write Buffer commands are synchronized such that sequential Write Buffer and Read Buffer
commands access the same 512 bytes within the buffer.
Table 252 Write Buffer DMA Command (EBh)
Command Input
Field
Description
FEATURE
N/A
COUNT
N/A
LBA
N/A
DEVICE
Bit Description
7 Obsolete
6 N/A
5 Obsolete
4 Transport Dependent
3:0 Reserved
Command
7:0 EBh
Normal Outputs
See Normal Outputs in Section 12.7 Flush Cache (E7h)
Error Outputs
See Error Outputs in Section 12.4 Download Microcode (92h)
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Hard Disk Drive Specification