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From: david@eng.sun.com (Xemu Division, Velcro Industries)
Newsgroups: comp.sys.sun
Subject: Re: detecting the cg6 board
Keywords: Miscellaneous
Message-ID: <8144@brazos.Rice.edu>
Date: 24 May 90 17:45:16 GMT
Sender: root@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Refs:  Original: v9n182
X-Sun-Spots-Digest: Volume 9, Issue 182, message 10

In article <8102@brazos.Rice.edu> pcad!eddy@uunet.uu.net (Eduardo Juncosa)
writes:
>I am trying to detect within a program whether the SPARC station that is
>executing the program had a cg6 graphics accelerator board installed.  SUN
>suggested I do a pr_open("/dev/cgsix0").

The person at Sun who suggested this should be shot (well, at least
corrected) because a) there is no need for a /dev/cgsix0 device (/dev/fb
works just fine) and b) there is such a thing as a multi-headed system you
know!

Probably the best way to do this is to get a file descriptor pointing to
the frame buffer device and then use the FBIOGATTR ioctl.  For example, in
a SunView program you might do something like...

	int fd;
	struct screen screen;
	struct fbgattr fbattr;

	win_screenget((int) window_get(win, WIN_FD), &screen);

	if ((fd = open(screen.scr_fbname, 2, 0)) < 0) {
		/* error */
	}

	if (ioctl(fd, FBIOGATTR, &fbattr) < 0 ||
		fbattr.fbtype.fb_type != FBTYPE_SUNFAST_COLOR) {
		/* it's not a cg6 */
	}
	else {
		/* it is a cg6 */
	}

	(void) close(fd);

David DiGiacomo, Sun Microsystems, Mt. View, CA  david@eng.sun.com