82801FB Datasheet, PDF (505/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

SATA Controller Registers (D31:F2)
12.3.2.14 PxCI—Port [3:0] Command Issue Register (D31:F2)
Address Offset:
Default Value:
Port 0: ABAR + 138h
Attribute:
Port 1: ABAR + 1B8h (Desktop Only)
Port 2: ABAR + 238h
Port 3: ABAR + 2B8h (Desktop Only)
00000000h
Size:
R/W
32 bits
Bit
Description
Commands Issued (CI) — R/W. This field is set by software to indicate to the ICH6 that a command
has been built-in system memory for a command slot and may be sent to the device. When the ICH6
receives a FIS which clears the BSY and DRQ bits for the command, it clears the corresponding bit
31:0 _{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^® I/O Controller Hub 6 (ICH6) Family Datasheet
505