Laptop User's Manual

Set Display Device State
Input Field
Major Function Number - 1ð
Minor Function Number - ð1
Parameter 1 - Request display status
Bit ð - Built-in display (panel) status
= ð : Disable
= 1 : Enable
Bit 1 - External CRT status
= ð : Disable
= 1 : Enable
Bit 2 - TV status
= ð : Disable
= 1 : Enable
Bits 5-3 : Reserved
Bit 6 - Monitor detection ignore
= ð : Do not ignore
= 1 : Ignore
Bit 7 - Dual enable flag
= ð : Disable
= 1 : Enable
Parameter 2 - Reserved
Parameter 3 - Reserved
Parameter 4 - When parameter 2 (bits 7-ð) is ð1h in return
of “Get Display Device State”:
Bits 31-16 : Reserved
Bits 15-ð : Display selection mode
Bit ð - Display selection mode
= ð : LCD - CRT selection mode
= 1 : LCD - TV selection mode
Bits 7-1 : Reserved
Parameter 5 - Reserved
Output Field
Return Code - Error status
Auxiliary Return Code - Reserved
Parameter 1 - Reserved
Parameter 2 - Reserved
Parameter 3 - Reserved
Parameter 4 - Reserved
Parameter 5 - Reserved
B-24 SMAPI BIOS