307013-003 Datasheet, PDF (543/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

SATA Controller Registers (D31:F2) (Desktop and Mobile Only)
12.3.2.14 PxCI—Port [3:0] Command Issue Register (D31:F2)
Address Offset:
Default Value:
Port 0: ABAR + 138h
Attribute:
R/W
Port 1: ABAR + 1B8h (ICH7R and ICH7DH Only)
Port 2: ABAR + 238h
Port 3: ABAR + 2B8h (ICH7R and ICH7DH Only)
00000000h
Size:
32 bits
Bit
31:0
Description
Commands Issued (CI) — R/W. This field is set by software to indicate to the Intel^®
ICH7 that a command has been built-in system memory for a command slot and may
be sent to the device. When the ICH7 receives a FIS which clears the BSY and DRQ bits
for the command, it clears the corresponding bit in this register for that command slot.
This field is also cleared when PxCMD.ST (ABAR+118h/198h/218h/298h:bit 0) is
cleared by software.
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Intel ^® ICH7 Family Datasheet
543