Member Avatar for eeeraser

Hi...
In MS-DOS, how could I hide the text cursor NOT the mouse cursor?..
Thanks..

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  • Latest Post Latest Post by schwepZ
Member Avatar for mathematician

Move the cursor to a position off the screen (row 30, column 90 say), or clear bit 6, and set bit 5, in the CRT controller's cursor start address register.

Member Avatar for schwepZ

Hi...
In MS-DOS, how could I hide the text cursor NOT the mouse cursor?..
Thanks..

move the pointer out from screen as said above
and code for that is:

mov ah,2 ; this is BIOS video service for setting pointer location
mov bh,Video_page_number ; active video page is not always the same
mov dh,row ; row in HEXIMAL (e.g 3=3, 9=9 but 10=A 11=B until 15=F so 16=10)
mov dl,column ; column same as row
int 10h ; that is calling this BIOS Function

but you need active page number which you get like this:

mov ah,0fh
int 10h
returns active video page in register bh

well
i suggest you to make this whole code like this:

;-------------------------------------
jmp HideCursor
ActivePageNumber db ? ;allocates memory = 1byte
HideCursor:
mov ah,0fh ;BIOS Function Read Video mode
int 10h
mov ActivePageNumber,bh

mov ah,2
mov bh,ActivePageNumber
mov dh,1ah ;that is the 26th row which is out from screen
mov dl,51h ;that is the 81th column out from screen aswell
int 10h ;(actually only one should point out from screen, not both, not nessesary)
;-------------------------------------
check this reply.txt file for better view;)

don't forget get to bring cursor back into screen area before int 20h (terminating program)
because if you don't then program will crash

good luck there! :)

move the pointer out from screen as said above
and code for that is:

	mov	ah,2      		   ; this is BIOS video service for setting pointer location
	mov	bh,Video_page_number  	; active video page is not always the same
	mov	dh,row     		; row in HEXIMAL (e.g  3=3, 9=9 but 10=A 11=B until 15=F so 16=10)
	mov	dl,column 		; column same as row
	int	10h      		; that is calling this BIOS Function

but you need active page number which you get like this:

	mov	ah,0fh
	int   	10h
returns	active video page in register bh

well
i suggest you to make this whole code like this:

;-------------------------------------
	jmp	HideCursor
ActivePageNumber	db	?	;allocates memory = 1byte
HideCursor:
	mov	ah,0fh			;BIOS Function Read Video mode
	int	10h			
	mov	ActivePageNumber,bh

	mov	ah,2
	mov	bh,ActivePageNumber
	mov	dh,1ah			;that is the 26th row which is out from screen
	mov	dl,51h			;that is the 81th column out from screen aswell 
	int	10h			;(actually only one should point out from screen, not both, not nessesary)
;-------------------------------------

don't forget get to bring cursor back into screen area before int 20h (terminating program)
because if you don't then program will crash

good luck there! :)
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