1 .\" $NetBSD: topcat.4,v 1.3 2002/02/13 08:17:58 ross Exp $
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34 .\" from: @(#)tc.4 8.1 (Berkeley) 6/9/93
36 .Dd September 10, 2001
43 98550 ``Topcat'' and ``Catseye'' device interface
45 .Cd "topcat* at intio?"
46 .Cd "topcat* at dio? scode ?"
48 This driver is for the
50 98545 and 98547 ``Topcat''
53 98549, and 98550 ``Catseye'' display cards.
54 This driver merely checks for the existence of the device
55 and does minimal set up, as it is expected the applications will initialize
56 the device to their requirements.
57 The Topcat and Catseye are nearly identical in common usage and only the
58 Topcat will be referred to from now on.
60 The Topcat display cards are not user configurable. If one is present on a
61 system, it will always have a frame buffer address of 0x200000 and a control
62 register address of 0x560000. These are the
67 Terminal Emulator) defaults. The device can also be used as a graphics output
72 calls supported by the
74 system for the Topcat are:
75 .Bl -tag -width GRFIOCGINFO
79 Get info about device, setting the entries in the
81 structure, as defined in
82 .Aq Pa hpdev/grfioctl.h .
83 For the 98544 or 98549,
84 the number of planes should be 1, as they are monochrome devices.
85 The number of planes for a 98545 is 4, translating to 15 colors,
87 The 98547 and 98548 cards have 6 planes, yielding 63 colors and black.
88 The 98550 has 8 planes, yielding 255 colors and black.
89 The displayed frame buffer size for the 98549 and 98550 is 2048 x 1024,
90 for the others it is 1024 x 768.
94 Turn graphics on by enabling
96 output. The screen will come on, displaying
97 whatever is in the frame buffer, using whatever colormap is in place.
101 Turn graphics off by disabling output to the
103 The frame buffer contents
106 Map Device to user space
108 Map in control registers and framebuffer space. Once the device file is
109 mapped, the frame buffer structure is accessible. The frame buffer structure
110 describing Topcat/Catseye devices is defined in
111 .Aq Pa hpdev/grf_tcreg.h .
114 For further information about the use of
118 .Bl -tag -width /dev/MAKEDEV.hpux -compact
127 .It Pa /dev/MAKEDEV.hpux
133 A small example of opening, mapping and using the device is given below.
134 For more examples of the details on the behavior of the device, see the device
135 dependent source files for the X Window System, in the
136 .Pa /usr/src/new/X/libhp
140 u_char *Addr, frame_buffer;
144 disp_fd = open("/dev/grf0",1);
146 if (ioctl (disp_fd, GRFIOCGINFO, \*[Am]gi) \*[Lt] 0) return -1;
148 (void) ioctl (disp_fd, GRFIOCON, 0);
151 if (ioctl (disp_fd, GRFIOCMAP, \*[Am]Addr) \*[Lt] 0) {
152 (void) ioctl (disp_fd, GRFIOCOFF, 0);
155 tc = (tcboxfb *) Addr; /* Control Registers */
156 frame_buffer = (u_char *) Addr + gi.gd_regsize; /* Frame buffer memory */
162 .Tn /usr/CE.utilities/Crtadjust
163 programs must be used.
165 .Bl -tag -width [EINVAL]
169 Another process has the device open.