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CSM Configuration

CSM Configuration firmware setup page decoded from AMI HII/IFR resources.

Form ID: 0x287b
Records: 8
Parents: Advanced
Path: Setup / Advanced / CSM Configuration / Setup / Advanced / Advanced / CSM Configuration

Record 1760

GateA20 Active

Firmware Value

UPON REQUEST - GA20 can be disabled using BIOS services.

Firmware help text

UPON REQUEST - GA20 can be disabled using BIOS services. ALWAYS - do not allow disabling GA20; this option is useful when any RT code is executed above 1MB.

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x647
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd09
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Upon Request	Standard defaultManufacturing default
`1`	Always

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}

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Record 1761

Option ROM Messages

Firmware Value

Set display mode for Option ROM

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x648
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd05
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`1`	Force BIOS	Standard defaultManufacturing default
`0`	Keep Current

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}
{"condition_id": 871, "type": "SuppressIf", "offset": 395686, "expr": ["EqIdVal QuestionId: 0x51, Value: 0x2", "Not"]}

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Record 1762

INT19 Trap Response

Firmware Value

BIOS reaction on INT19 trapping by Option ROM: IMMEDIATE - execute the trap right away; POSTPONED - execute the trap during legacy boot.

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x649
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd06
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`1`	Immediate	Standard defaultManufacturing default
`0`	Postponed

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}

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Record 1763

HDD Connection Order

Firmware Value

Some OS require HDD handles to be adjusted, i.e.

Firmware help text

Some OS require HDD handles to be adjusted, i.e. OS is installed on drive 80h.

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x64a
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd08
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Adjust	Standard defaultManufacturing default
`1`	Keep

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}
{"condition_id": 872, "type": "SuppressIf", "offset": 395766, "expr": ["EqIdVal QuestionId: 0x4F, Value: 0x2"]}

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Record 1764

Boot option filter

Firmware Value

This option controls Legacy/UEFI ROMs priority

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x64b
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd0a
Width: 1 byte(s)
Range: 0 to 2 step 0

Value	Label	Markers
`0`	UEFI and Legacy
`1`	Legacy only
`2`	UEFI only

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	UEFI and Legacy
`1`	Manufacturing	`0`	UEFI and Legacy

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}

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Record 1765

Storage

Firmware Value

Controls the execution of UEFI and Legacy Storage OpROM

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x64c
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd0c
Width: 1 byte(s)
Range: 0 to 2 step 0

Value	Label	Markers
`0`	Do not launch
`1`	UEFI
`2`	Legacy

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`1`	UEFI
`1`	Manufacturing	`1`	UEFI

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}

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Record 1766

Video

Firmware Value

Controls the execution of UEFI and Legacy Video OpROM

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x64d
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd0d
Width: 1 byte(s)
Range: 0 to 2 step 0

Value	Label	Markers
`0`	Do not launch
`1`	UEFI
`2`	Legacy

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`2`	Legacy
`1`	Manufacturing	`2`	Legacy

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}

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Record 1767

Other PCI devices

Firmware Value

Determines OpROM execution policy for devices other than Network, Storage, or Video

Form: CSM Configuration
Opcode: OneOf
Question ID: 0x64e
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xd0e
Width: 1 byte(s)
Range: 0 to 2 step 0

Value	Label	Markers
`0`	Do not launch
`1`	UEFI	Standard defaultManufacturing default
`2`	Legacy

Visibility / conditions

{"condition_id": 869, "type": "SuppressIf", "offset": 395611, "expr": ["EqIdVal QuestionId: 0x1212, Value: 0x1"]}
{"condition_id": 870, "type": "SuppressIf", "offset": 395619, "expr": ["EqIdVal QuestionId: 0x2824, Value: 0x0"]}

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