179 lines
5.5 KiB
Groff
179 lines
5.5 KiB
Groff
.\" $NetBSD: tc.4,v 1.5 1999/12/15 23:44:52 abs 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: @(#)tc.4 8.1 (Berkeley) 6/9/93
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.\"
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.Dd June 9, 1993
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.Dt TC 4 hp300
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.Os
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.Sh NAME
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.Nm tc
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.Nd
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.Tn HP98544
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98550 ``Topcat'' and ``Catseye'' device interface
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.Sh DESCRIPTION
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This driver is for the
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.Tn HP98544 ,
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98545 and 98547 ``Topcat''
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and
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.Tn HP98548 ,
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98549, and 98550 ``Catseye'' display cards.
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This driver merely checks for the existence of the device
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and does minimal set up, as it is expected the applications will initialize
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the device to their requirements.
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The Topcat and Catseye are nearly identical in common usage and only the
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Topcat will be referred to from now on.
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.Pp
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The Topcat display cards are not user configurable. If one is present on a
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system, it will always have a frame buffer address of 0x200000 and a control
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register address of 0x560000. These are the
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.Tn HP
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series 300
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.Tn ITE
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(Internal
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Terminal Emulator) defaults. The device can also be used as a graphics output
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device.
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.Pp
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The
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.Xr ioctl 2
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calls supported by the
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.Bx
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system for the Topcat are:
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.Bl -tag -width GRFIOCGINFO
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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 98544 or 98549,
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the number of planes should be 1, as they are monochrome devices.
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The number of planes for a 98545 is 4, translating to 15 colors,
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excluding black.
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The 98547 and 98548 cards have 6 planes, yielding 63 colors and black.
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The 98550 has 8 planes, yielding 255 colors and black.
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The displayed frame buffer size for the 98549 and 98550 is 2048 x 1024,
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for the others it is 1024 x 768.
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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 frame buffer structure
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describing Topcat/Catseye devices is defined in
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.Aq Pa hpdev/grf_tcreg.h .
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.El
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.Pp
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For further information about the use of
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.Xr ioctl
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see the man page.
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.Sh EXAMPLE
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A small example of opening, mapping and using the device is given below.
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For more examples of the details on the behavior of the device, see the device
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dependent source files for the X Window System, in the
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.Pa /usr/src/new/X/libhp
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directory.
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.Bd -literal
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struct tcboxfb *tc;
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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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tc = (tcboxfb *) 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/crt9837
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.It Pa /dev/crt98550
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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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.Tn HP-UX
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.Tn /usr/CE.utilities/Crtadjust
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programs 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
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.Xr ioctl
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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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