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diff --git a/share/man/man4/tb.4 b/share/man/man4/tb.4 new file mode 100644 index 00000000000..cb5aefe0c49 --- /dev/null +++ b/share/man/man4/tb.4 @@ -0,0 +1,110 @@ +.\" $NetBSD: tb.4,v 1.3 1994/12/10 08:04:57 glass Exp $ +.\" +.\" Copyright (c) 1986, 1991 Regents of the University of California. +.\" All rights reserved. +.\" +.\" 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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. +.\" +.\" @(#)tb.4 6.4 (Berkeley) 3/27/91 +.\" +.Dd March 27, 1991 +.Dt TB 4 +.Os BSD 4.3 +.Sh NAME +.Nm tb +.Nd line discipline for digitizing devices +.Sh SYNOPSIS +.Cd pseudo-device tb +.Sh DESCRIPTION +This line discipline provides a polled interface to many common +digitizing devices which are connected to a host through a serial line. +When these devices stream data at high speed, the use of the +line discipline is critical in minimizing the number of samples +that would otherwise be lost due to buffer exhaustion in the +.Xr tty 4 +handler. +.Pp +The line discipline is enabled by a sequence: +.Bd -literal -offset indent +#include <sys/tablet.h> +int ldisc = TBLDISC, fildes; ... +ioctl(fildes, TIOCSETD, &ldisc); +.Ed +.Pp +A typical application program then polls the digitizing device by +reading a binary data structure which contains: the current X and +Y positions (in the device coordinate space), +up-down status of the buttons or pen stylus, +proximity information (when available), and a count +of the number of samples received from the input device +since it was opened. In addition, devices such as the +.Tn GTCO +append tilt and pressure information to the end of +the aforementioned structure. For the Polhemus 3-D digitizer +the structure read is completely different. Refer to the +include file for a complete description. +.Pp +While in tablet mode, normal teletype input and output functions take place. +Thus, if an 8 bit output data path is desired, it is necessary +to prepare the output line by putting it into +.Tn RAW +mode using +.Xr ioctl 2 . +This must be done +.Em before +changing the discipline with +.Dv TIOCSETD , +as most +.Xr ioctl 2 +calls are disabled while in tablet line-discipline mode. +.Pp +The line discipline supports +.Xr ioctl 2 +requests to get/set the operating mode, and to get/set the tablet type +and operating mode by +.Em or Ns -ing +the two values together. +.Pp +The line discipline supports digitizing devices which are +compatible with Hitachi, +.Tn GTCO , +or Polhemus protocol formats. +For Hitachi there are several formats with that used in the +newer model +.Tn HDG-1111B +the most common. +.Sh DIAGNOSTICS +None. +.Sh SEE ALSO +.Xr tty 4 +.Sh HISTORY +The +.Nm +interface appeared in +.Bx 4.3 . |