NAME

cgfour − Sun-3 color graphics interface

SYNOPSIS — SUN-3

 
cgfour0 at obmem 4 csr 0xff000000

DESCRIPTION

The cgfour is the Sun-3/110 color frame buffer, normally supplied with a 19” color, 19” grayscale, or 15” color 66 Hz non-interlaced color monitor.  It provides the standard frame buffer interface as defined in fbio(4S).

In addition to the ioctls described under fbio(4s), the cgfour interface responds to two cgfour-specific colormap ioctls, FBIOPUTCMAP and FBIOGETCMAP.  FBIOPUTCMAP returns no information other than success/failure via the ioctl return value.  FBIOGETCMAP returns its information in the arrays pointed to by the red, green, and blue members of its fbcmap structure argument; fbcmap is defined in <sun/fbio.h> as:

structfbcmap {
intindex;/∗ first element (0 origin) ∗/
intcount;/∗ number of elements ∗/
unsigned char ∗red;/∗ red color map elements ∗/
unsigned char∗green;/∗ green color map elements ∗/
unsigned char∗blue;/∗ blue color map elements ∗/
};

The driver uses color board vertical-retrace interrupts to load the colormap. 

Currently the ioctls FBIOSATTR and FBIOGATTR are only supported by the cgfour frame buffer.  See fbio(4S).

FILES

/dev/cgfour0

SEE ALSO

mmap(2), fbio(4S)

Sun-3/1xx CPU Board Hardware Engineering Manual

BUGS

The FBVIDEO_ON value returned by the FBIOGVIDEO ioctl may be incorrect.  See fbio(4S).

Sun Release 3.2  —  Last change: 25 July 1986