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From: 831059l@aucs.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Turning the cursor off
Message-ID: <588@aucs.UUCP>
Date: Tue, 24-Nov-87 07:59:03 EST
Article-I.D.: aucs.588
Posted: Tue Nov 24 07:59:03 1987
Date-Received: Fri, 27-Nov-87 04:42:34 EST
Reply-To: 831059l@aucs.UUCP (STEVEN LUCIEN LANGLOIS)
Distribution: na
Organization: School of Computer Science, Acadia Univ., Nova Scotia
Lines: 37


	Turning the cursor off and on is really quite easy using the
BIOS video interrupt 10h function 3. Setting bit 5 of ch (starting scan
line of the cursor) to 1 turns the cursor off. This has always worked
for me on any machine I've used. The following is assemly code to
turn the cursor off and on:

;******************************************************************
;
;       void cursoff(void)
;
;******************************************************************
_cursoff proc near
        mov     ah,3h      ; find what the cursor currently looks like
        int     10h
        mov     ah,1h      ; bios video interrupt to set cursor size
        or      ch,20h     ; setting bit 5 of ch to 1 turns the cursor off
        int     10h
        ret
_cursoff endp

;******************************************************************
;
;       void curson(void)
;
;******************************************************************
_curson proc near
        mov     ah,3h      ; find what the cursor currently looks like
        int     10h
        mov     ah,1h      ; bios video interrupt to set cursor size
        and     ch,0dfh    ; setting bit 5 of ch to 0 turns the cursor on
        int     10h
        ret
_curson endp

Steven Langlois Acadia Univ. Wolfville NS Canada B0P1X0 
BITNET:{uunet|watmath|utai|garfield}dalcs!aucs!831059L UUCP:831059L@Acadia