i9 BIOS
Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026

Onboard Devices

DTBT Controller 1 Configuration

DTBT Controller 1 Configuration firmware setup page decoded from AMI HII/IFR resources.

Form ID
0x2818
Records
9
Path
Setup / Advanced / Thunderbolt(TM) Configuration / Discrete Thunderbolt(TM) Configuration / DTBT Controller 1 Configuration / Setup / Advanced / Advanced / Thunderbolt(TM) Configuration / Discrete Thunderbolt(TM) Configuration / DTBT Controller 1 Configuration / Setup / Advanced / Platform Settings / TCSS Platform Setting / Thunderbolt(TM) Configuration / Discrete Thunderbolt(TM) Configuration / DTBT Controller 1 Configuration

Record 1487

DTBT Controller 1

Firmware Value

None

Opcode
OneOf
Question ID
0x280d
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7ab
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Default store records

Store IDStore labelValueOption label
0Standard0Disabled

Record 1488

DTbt Root Port Type

Firmware Value

Select the TBT Root Port Type.

Firmware help text

Select the TBT Root Port Type. PCH or PEG

Opcode
OneOf
Question ID
0x280e
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7ad
Width
1 byte(s)
Range
1 to 2 step 0
ValueLabelMarkers
1PCH Root PortStandard defaultManufacturing default
2PEG Root Port

Visibility / conditions

  • {"condition_id": 600, "type": "SuppressIf", "offset": 379475, "expr": ["EqIdVal QuestionId: 0x124F, Value: 0x1", "Not"]}

Record 1489

TBT Host Router

Firmware Value

Enable the host router based on ports available.

Opcode
OneOf
Question ID
0x280f
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7b2
Width
1 byte(s)
Range
1 to 2 step 0
ValueLabelMarkers
1One portStandard defaultManufacturing default
2Two port

Record 1490

Extra Bus Reserved

Firmware Value

Extra Bus Reserved 56-One port Host,106-Two port Host.

Opcode
Numeric
Question ID
0x549
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7b4
Width
1 byte(s)
Range
0 to 255 step 1

Default store records

Store IDStore labelValueOption label
0Standard56

Record 1491

Reserved Memory

Firmware Value

Reserved Memory for this Root Bridge (1-4096) MB

Opcode
Numeric
Question ID
0x54a
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7b7
Width
2 byte(s)
Range
1 to 4096 step 1

Default store records

Store IDStore labelValueOption label
0Standard356

Record 1492

Memory Alignment

Firmware Value

Memory Alignment (0-31 bits)

Opcode
Numeric
Question ID
0x54b
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7bc
Width
1 byte(s)
Range
0 to 31 step 1

Default store records

Store IDStore labelValueOption label
0Standard26

Record 1493

Reserved PMemory

Firmware Value

Reserved Prefetchable Memory for this Root Bridge (1-4096) MB

Opcode
Numeric
Question ID
0x54c
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7bf
Width
2 byte(s)
Range
1 to 4096 step 1

Default store records

Store IDStore labelValueOption label
0Standard544

Record 1494

PMemory Alignment

Firmware Value

PMemory Alignment (0-31 bits)

Opcode
Numeric
Question ID
0x54d
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7c2
Width
1 byte(s)
Range
0 to 31 step 1

Default store records

Store IDStore labelValueOption label
0Standard28

Record 1495

Reserved I/O

Firmware Value

Reserved I/O

Opcode
Numeric
Question ID
0x54e
VarStore
Setup
VarStore GUID
EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset
0x7ba
Width
1 byte(s)
Range
0 to 60 step 4

Default store records

Store IDStore labelValueOption label
0Standard0