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Intel® Management Engine Subsystem Registers (D22:F[3:0])
17.1.1.9
SVID—Subsystem Vendor ID Register (Intel® MEI 1—D22:F0)
Address Offset:
Default Value:
17.1.1.10
15:0
Subsystem Vendor ID (SSVID) — R/WO. Indicates the sub-system vendor identifier. This field
should be programmed by BIOS during boot-up. Once written, this register becomes Read Only. This
field can only be cleared by PLTRST#.
Note: Register must be written as a Word write or as a DWord write with SID register.
SID—Subsystem ID Register (Intel® MEI 1—D22:F0)
2Eh–2Fh
0000h
R/WO
16 bits
Bit
Description
Subsystem ID (SSID) — R/WO. Indicates the sub-system identifier. This field should be
programmed by BIOS during boot-up. Once written, this register becomes Read Only. This field can
only be cleared by PLTRST#.
Note: Register must be written as a Word write or as a DWord write with SVID register.
CAPP—Capabilities List Pointer Register (Intel® MEI 1—D22:F0)
7:0
34h
50h
Attribute:
Size:
RO
8 bits
Description
Capabilities Pointer (PTR) — RO. Indicates that the pointer for the first entry in the capabilities
list is at 50h in configuration space.
INTR—Interrupt Information Register (Intel® MEI 1—D22:F0)
Address Offset:
Default Value:
3Ch–3Dh
0100h
Bit
15:8
7:0
Attribute:
Size:
R/W, RO
16 bits
Description
Interrupt Pin (IPIN) — RO. This indicates the interrupt pin the Intel MEI host controller uses. A
value of 1h/2h/3h/4h indicates that this function implements legacy interrupt on INTA/INTB/INTC/
INTD, respectively.
Interrupt Line (ILINE) — R/W. Software written value to indicate which interrupt line (vector) the
interrupt is connected to. No hardware action is taken on this register.
HFS— Intel® ME Host Firmware Status Register (Intel® MEI 1—
D22:F0)
Address Offset:
Default Value:
Bit
31:28
560
Attribute:
Size:
15:0
Bit
17.1.1.13
R/WO
16 bits
Description
Address Offset:
Default Value:
17.1.1.12
Attribute:
Size:
Bit
Address Offset:
Default Value:
17.1.1.11
2Ch–2Dh
0000h
40h–43h
00000000h
Attribute:
Size:
RO
32 bits
Description
BIOS MSG ACK: Acknowledge for register based BIOS message in MEI 1 H_GS Register.
27:25
BIOS MSG ACK Data: Message specific data for acknowledged BIOS message.
24:20
Reserved
19:16
Operating Mode: This field describes the current operating mode of Intel® ME.
1:0 – Reserved
2 – Debug Mode
14:3 – Reserved
15 – Intel® SPS firmware is running in Intel® ME
Intel® Xeon® Processor D-1500 Product Family
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015