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+.\"	$NetBSD: topcat.4,v 1.8 2024/05/01 19:34:19 tsutsui Exp $
+.\"
+.\" Copyright (c) 1990, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Systems Programming Group of the University of Utah Computer
+.\" Science Department.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     from: @(#)tc.4	8.1 (Berkeley) 6/9/93
+.\"
+.Dd May 1, 2024
+.Dt TOPCAT 4 hp300
+.Os
+.Sh NAME
+.Nm topcat
+.Nd
+.Tn HP98544
+98550
+.Dq Topcat
+and
+.Dq Catseye
+device interface
+.Sh SYNOPSIS
+.Cd "topcat* at intio?"
+.Cd "topcat* at dio? scode ?"
+.Cd "wsdisplay* at topcat?"
+.Sh DESCRIPTION
+This driver is for the
+.Tn HP98544 ,
+98545, 98542, 98543, and 98547
+.Dq Topcat
+and
+.Tn HP98548 ,
+98549, and 98550
+.Dq Catseye
+display cards.
+This driver merely checks for the existence of the device
+and does minimal setup, as it is expected the applications will initialize
+the device to their requirements.
+The Topcat and Catseye are nearly identical in common usage and only the
+Topcat will be referred to from now on.
+.Pp
+The Topcat display cards are not user configurable.
+If one is present on a system, it will always have a frame buffer
+address of 0x200000 and a control register address of 0x560000.
+These are the
+.Tn HP
+series 300
+.Tn ITE
+(Internal
+Terminal Emulator) defaults.
+The device can also be used as a graphics output
+device.
+.Sh SEE ALSO
+.Xr wscons 4 ,
+.Xr wsdisplay 4