174 lines
5.4 KiB
Groff
174 lines
5.4 KiB
Groff
.\" $NetBSD: rb.4,v 1.5 1998/02/06 06:06:56 perry Exp $
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.\"
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Systems Programming Group of the University of Utah Computer
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.\" Science Department.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)rb.4 8.1 (Berkeley) 6/9/93
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.\"
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.Dd June 9, 1993
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.Dt RB 4 hp300
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.Os
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.Sh NAME
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.Nm rb
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.Nd
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.Tn HP98720
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``Renaissance'' device interface
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.Sh DESCRIPTION
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This driver is for the
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.Tn HP98720
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and 98721 graphics device, also known as
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the Renaissance. This driver has not been tested with all possible
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combinations of frame buffer boards and scan boards installed in the device.
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The driver merely checks for the existence of the device and does minimal set
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up.
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.Pp
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The Renaissance can be configured at either the ``internal'' address
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(frame buffer address 0x200000, control register space address 0x560000)
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or at an external select code less than 32.
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At the internal address it will be the ``preferred'' console device
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(see
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.Xr cons 4 ) .
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The hardware installation manual describes the procedure for
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setting these values.
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.Pp
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A user process communicates to the device initially by means of
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.Xr ioctl 2
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calls. For the
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.Tn HP-UX
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.Xr ioctl 2
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calls supported, refer to
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.Tn HP-UX
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manuals.
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The
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.Bx
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calls supported are:
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.Bl -tag -width indent
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.It Dv GRFIOCGINFO
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Get Graphics Info
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.Pp
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Get info about device, setting the entries in the
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.Ar grfinfo
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structure, as defined in
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.Aq Pa hpdev/grfioctl.h .
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For the standard 98720, the number of planes should be 4. The number of
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colors would therefore be 15, excluding black. If one 98722A frame buffer
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board is installed, there will still be 4 planes, with the 4 planes on the
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colormap board becoming overlay planes. With each additional 98722 frame
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buffer board 4 planes will be added up to a maximum of 32 planes total.
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.It Dv GRFIOCON
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Graphics On
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.Pp
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Turn graphics on by enabling
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.Tn CRT
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output. The screen will come on, displaying
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whatever is in the frame buffer, using whatever colormap is in place.
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.It Dv GRFIOCOFF
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Graphics Off
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.Pp
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Turn graphics off by disabling output to the
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.Tn CRT .
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The frame buffer contents
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are not affected.
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.It Dv GRFIOCMAP
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Map Device to user space
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.Pp
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Map in control registers and framebuffer space. Once the device file is
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mapped, the frame buffer structure is accessible. The structure describing
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the 98720 is defined in
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.Pa hpdev/grf_rbreg.h .
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.El
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.Sh EXAMPLE
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This is a short segment of code showing how the device is opened and mapped
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into user process address space assuming that it is grf0:
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.Bd -literal
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struct rboxfb *rbox;
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u_char *Addr, frame_buffer;
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struct grfinfo gi;
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int disp_fd;
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disp_fd = open("/dev/grf0",1);
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if (ioctl (disp_fd, GRFIOCGINFO, &gi) < 0) return -1;
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(void) ioctl (disp_fd, GRFIOCON, 0);
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Addr = (u_char *) 0;
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if (ioctl (disp_fd, GRFIOCMAP, &Addr) < 0) {
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(void) ioctl (disp_fd, GRFIOCOFF, 0);
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return -1;
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}
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rbox = (rboxfb *) Addr; /* Control Registers */
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frame_buffer = (u_char *) Addr + gi.gd_regsize; /* Frame buffer memory */
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.Ed
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.Sh FILES
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.Bl -tag -width /dev/MAKEDEV.hpux -compact
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.It Pa /dev/grf?
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.Bx
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special file
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.It Pa /dev/crt98720
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.It Pa /dev/ocrt98720
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.Tn HP-UX
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.Em starbase
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special files
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.It Pa /dev/MAKEDEV.hpux
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script for creating
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.Tn HP-UX
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special files
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.El
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.Sh DIAGNOSTICS
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None under
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.Bx .
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The
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.Tn HP-UX
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.Tn CE.utilities
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must be used.
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.Sh ERRORS
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.Bl -tag -width [EINVAL]
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.It Bq Er ENODEV
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no such device.
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.It Bq Er EBUSY
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Another process has the device open.
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.It Bq Er EINVAL
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Invalid ioctl specification.
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.El
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.Sh SEE ALSO
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.Xr ioctl 2 ,
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.Xr grf 4 .
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.Pp
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For extensive code examples using the
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Renaissance, see the X device dependent source.
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.Sh BUGS
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Not tested for all configurations of scan board and frame buffer memory boards.
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