Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!decwrl!ucbvax!agate!violet.berkeley.edu!izumi
From: izumi@violet.berkeley.edu (Izumi Ohzawa)
Newsgroups: comp.sys.ibm.pc
Subject: Re: How do I point to the frame buffer?
Keywords: C, far pointers, frame buffer,ibm pc
Message-ID: <11544@agate.BERKELEY.EDU>
Date: 1 Jul 88 02:36:19 GMT
References: <2784@juniper.UUCP> <222@pigs.UUCP>
Sender: usenet@agate.BERKELEY.EDU
Organization: University of California, Berkeley
Lines: 22

In article <222@pigs.UUCP> haugj@pigs.UUCP (Joe Bob Willie) writes:
>In article <2784@juniper.UUCP>, dan@juniper.UUCP (Dan Galewsky) writes:
>> Could someone please tell me how to set up a  pointer to the frame buffer
>> on my PC's CGA from Microsoft C? I know that the frame buffer starts at 
>> 0xb800. So I tried the following :
>> far char *Screen;
>> Screen = (char *)0Xb800;
>> 			Puzzled...
>Dear Puzzled,
>far	char	*Screen = 0xb8000;

That doesn't work.  At least with Microsoft C, far pointer has
to be specified in the Segment:Offset format with an unsigned long
number.  So try;

far char *Screen = 0xb8000000;

or 
far char *Screen = 0xb8000000L;

izumi ohzawa
izumi@violet.berkeley.edu