IBM 770 manual Set Display Device State, B-24, Input Field, Output Field

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