OSDev.org

Posted: **Wed Oct 22, 2008 10:36 am**

Hi to all.

I have a question. Is there any way to select the active display page (text mode) in protected mode? (obviously without int 10H/ah=05h)
Or I must copy memory from other pages to 0xb8000?

Thank you

Posted: **Wed Oct 22, 2008 12:09 pm**

Ciao

Code: Select all

	MOV	DX,3D4H		
	MOV	AX,080CH	       ;Select page 1
	OUT	DX,AX		
	MOV	AX,000DH	
	OUT	DX,AX

This select page 1

for page 2,3,4,5,6,7 change the second line
in this way

Code: Select all

	MOV	AX,010CH	       ;Select page 2
	MOV	AX,180CH	       ;Select page 3
	MOV	AX,200CH	       ;Select page 4
	MOV	AX,280CH	       ;Select page 5
	MOV	AX,300CH	       ;Select page 6
	MOV	AX,380CH	       ;Select page 7

Ciao

OSDev.org

change active display page?

change active display page?

Re: change active display page?