
SATA Application Layer 171
SERVICE
Command code
A2h
Feature set
Overlap and Queued feature sets
– Mandatory when the Overlapped feature set is implemented.
Protocol
PACKET or READ/WRITE DMA QUEUED
Inputs
Register 76543210
Features na
Sector Count na
LBA Low na
LBA Mid na
LBA High na
Device obs na obs DEV na na na na
Command A2h
Device register –
DEV will specify the selected device.
Outputs
Outputs as a result of a SERVICE command are described in the command description for the com-
mand for which SERVICE is being requested.
Prerequisites
The device will have performed a bus release for a previous overlap PACKET, READ DMA QUEUED,
READ DMA QUEUED EXT, WRITE DM ...