diff options
| -rw-r--r-- | share/man/man4/man4.i386/Makefile | 8 | ||||
| -rw-r--r-- | share/man/man4/man4.i386/com.4 | 102 | ||||
| -rw-r--r-- | share/man/man4/man4.i386/lpa.4 | 62 | ||||
| -rw-r--r-- | share/man/man4/man4.i386/lpt.4 | 59 | ||||
| -rw-r--r-- | share/man/man4/man4.i386/npx.4 | 77 | ||||
| -rw-r--r-- | share/man/man4/man4.i386/sio.4 | 101 | ||||
| -rw-r--r-- | share/man/man4/sio.4 | 101 |
7 files changed, 508 insertions, 2 deletions
diff --git a/share/man/man4/man4.i386/Makefile b/share/man/man4/man4.i386/Makefile index 0bec425..b95ebb7 100644 --- a/share/man/man4/man4.i386/Makefile +++ b/share/man/man4/man4.i386/Makefile @@ -1,7 +1,11 @@ # @(#)Makefile 0.1 (RWGrimes) 3/25/93 -MAN4= mem.4 spkr.4 -MLINKS= mem.4 ../mem.4 mem.4 ../kmem.4 spkr.4 ../spkr.4 +MAN4= com.4 lpa.4 lpt.4 mem.4 npx.4 sio.4 spkr.4 + +MLINKS= com.4 ../com.4 lpa.4 ../lpa.4 lpt.4 ../lpt.4 +MLINKS+= mem.4 ../mem.4 mem.4 ../kmem.4 npx.4 ../npx.4 +MLINKS+= sio.4 ../sio.4 spkr.4 ../spkr.4 + MANSUBDIR=/i386 .include <bsd.prog.mk> diff --git a/share/man/man4/man4.i386/com.4 b/share/man/man4/man4.i386/com.4 new file mode 100644 index 0000000..4e45bab --- /dev/null +++ b/share/man/man4/man4.i386/com.4 @@ -0,0 +1,102 @@ +.\" Copyright (c) 1990, 1991 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. 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. +.\" +.\" from: @(#)dca.4 5.2 (Berkeley) 3/27/91 +.\" from: com.4,v 1.1 1993/08/06 11:19:07 cgd Exp +.\" $Id$ +.\" +.Dd August 28, 1993 +.Dt COM 4 i386 +.Os FreeBSD +.Sh NAME +.Nm com +.Nd +serial communications interface +.Sh SYNOPSIS +.Cd "device com0 at isa? port" \&"IO_COM1\&" tty irq 4 vector comintr +.Cd "device com1 at isa? port" \&"IO_COM2\&" tty irq 3 vector comintr +.Cd "device com2 at isa? port" \&"IO_COM3\&" tty irq 5 vector comintr +.Cd "device com3 at isa? port" \&"IO_COM4\&" tty irq 9 vector comintr +.Sh DESCRIPTION +The +.Nm com +driver provides support for NS8250-, NS16450-, and NS16550-based +.Tn EIA +.Tn RS-232C +.Pf ( Tn CCITT +.Tn V.28 ) +communications interfaces. The NS8250 and NS16450 have single character +buffers, and the NS16550 has a 16 character buffer. +.Pp +Input and output for each line may set to one of following baud rates; +50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, +19200, 38400, 57600, or 115200. +.Sh FILES +.Bl -tag -width Pa +.It Pa /dev/tty00 +.It Pa /dev/tty01 +.El +.Sh DIAGNOSTICS +.Bl -diag +.It com%d: silo overflow. +The single-character input +.Dq silo +has overflowed and incoming data has been lost. +.\".It com%d: weird interrupt: %x. +.\"The device has generated an unexpected interrupt +.\"with the code listed. +.El +.Sh SEE ALSO +.Xr tty 4 +.Xr sio 4 +.Sh HISTORY +The +.Nm +driver is derived from the +.Nm HP9000/300 +.Nm dca +driver and is +.Ud +.Sh BUGS +Data loss is possible on busy systems with baud rates greater than 300. +The +.Nm com +driver is slow, buggy, and not properly tested. +.Pp +The name of this driver and the constants which define the locations +of the various seiral ports are holdovers from +.Nm DOS . +.Pp +As usual, you get what you pay for; cheap NS16550 clones +generally don't work. diff --git a/share/man/man4/man4.i386/lpa.4 b/share/man/man4/man4.i386/lpa.4 new file mode 100644 index 0000000..659db55 --- /dev/null +++ b/share/man/man4/man4.i386/lpa.4 @@ -0,0 +1,62 @@ +.\" +.\" Copyright (c) 1993 Christopher G. Demetriou +.\" 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 Christopher G. Demetriou. +.\" 3. The name of the author may not be used to endorse or promote products +.\" derived from this software withough specific prior written permission +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: lpa.4,v 1.1 1993/08/06 10:34:11 cgd Exp +.\" $Id$ +.\" +.Dd August 28, 1993 +.Dt LPA 4 i386 +.Os FreeBSD +.Sh NAME +.Nm lpa +.Nd +Interruptless parallel port driver +.Sh SYNOPSIS +.\" XXX this is awful hackery to get it to work right... -- cgd +.Cd "device lpa0 at isa? port" \&"IO_LPT1\&" tty +.Cd "device lpa1 at isa? port" \&"IO_LPT2\&" tty +.Cd "device lpa2 at isa? port" \&"IO_LPT3\&" tty +.Sh DESCRIPTION +This driver provides access to parallel ports. It assumes that +the parallel port controller will not cause an interrupt, and +therefore must poll the controller. +.Sh FILES +.Bl -tag -width Pa -compact +.It Pa /dev/lpa0 +first interruptless parallel port driver +.El +.Sh SEE ALSO +.Xr lpt 4 +.Sh BUGS +This driver only exists to support broken parallel port implementations. +Systems with properly working parallel ports should use the +.Nm lpt +driver instead, as it is less resource-hungry. +.Pp +This driver could stand a rewrite. diff --git a/share/man/man4/man4.i386/lpt.4 b/share/man/man4/man4.i386/lpt.4 new file mode 100644 index 0000000..070a53e --- /dev/null +++ b/share/man/man4/man4.i386/lpt.4 @@ -0,0 +1,59 @@ +.\" +.\" Copyright (c) 1993 Christopher G. Demetriou +.\" 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 Christopher G. Demetriou. +.\" 3. The name of the author may not be used to endorse or promote products +.\" derived from this software withough specific prior written permission +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: lpt.4,v 1.1 1993/08/06 10:34:12 cgd Exp +.\" +.Dd August 28, 1993 +.Dt LPT 4 i386 +.Os FreeBSD +.Sh NAME +.Nm lpt +.Nd +Parallel port driver +.Sh SYNOPSIS +.Cd "device lpt0 at isa? port" \&"IO_LPT1\&" tty irq 7 vector lptintr +.Cd "device lpt1 at isa? port" \&"IO_LPT2\&" tty irq 7 vector lptintr +.Cd "device lpt2 at isa? port" \&"IO_LPT3\&" tty irq 7 vector lptintr +.Sh DESCRIPTION +This driver provides access to parallel ports. It assumes that +the parallel port controller interrupts the CPU properly. If +this is not the case, the +.Nm lpa +driver should be used instead. +.Sh FILES +.Bl -tag -width Pa -compact +.It Pa /dev/lpt0 +first parallel port driver +.El +.Sh SEE ALSO +.Xr lpa 4 +.Sh BUGS +There are lots of them, especially in cheap parallel port implementations. +.Pp +This driver could stand a rewrite. diff --git a/share/man/man4/man4.i386/npx.4 b/share/man/man4/man4.i386/npx.4 new file mode 100644 index 0000000..f904bd1 --- /dev/null +++ b/share/man/man4/man4.i386/npx.4 @@ -0,0 +1,77 @@ +.\" +.\" Copyright (c) 1993 Christopher G. Demetriou +.\" 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 Christopher G. Demetriou. +.\" 3. The name of the author may not be used to endorse or promote products +.\" derived from this software withough specific prior written permission +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: npx.4,v 1.1 1993/08/06 10:58:03 cgd Exp +.\" $Id$ +.\" +.Dd August 28, 1993 +.Dt NPX 4 i386 +.Os FreeBSD +.Sh NAME +.Nm npx +.Nd +Numeric Processing Extension coprocessor and emulator +.Sh SYNOPSIS +.Cd "options MATH_EMULATE" +.\" XXX this is awful hackery to get it to work right... -- cgd +.Cd "device npx0 at isa? port" \&"IO_NPX0\&" tty irq 13 vector npxintr +.Sh DESCRIPTION +The +.Nm npx +driver enables the use of the system's Numeric Processing Extension +coprocessor, +if one is present. Numeric processing extensions are present in +systems with +.Nm 486DX +CPUs and in systems with +.Nm 387 +or +.Nm 487SX +coprocessors. The +.Nm npx +driver is required for proper system functioning regardless +of whether or not a NPX is present. +.Pp +If there is no NPX present in the system, the "MATH_EMULATE" +option must be defined in the kernel configuration file. +It will provide support for the instructions normally executed +by the NPX. If there is no NPX in the system and the kernel +is not built with math emulation, the system will not boot. +.Sh CAVEATS +The emulator is much slower than the NPX coprocessor. +This will result in poor floating-point math performance +if the emulator must be used. +.Sh BUGS +There are lots of them, especially on cheap motherboards. In particular, +some motherboards do not have the interrupt lines from the NPX to +the CPU wired properly. If this is the case, the emulator must be used +if consistent system operation is desired. +.Pp +Emulation of the transcendental functions instructions is incorrect. +Emulation of other instructions is suspect. diff --git a/share/man/man4/man4.i386/sio.4 b/share/man/man4/man4.i386/sio.4 new file mode 100644 index 0000000..53efb1c --- /dev/null +++ b/share/man/man4/man4.i386/sio.4 @@ -0,0 +1,101 @@ +.\" Copyright (c) 1990, 1991 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. 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. +.\" +.\" from: @(#)dca.4 5.2 (Berkeley) 3/27/91 +.\" from: com.4,v 1.1 1993/08/06 11:19:07 cgd Exp +.\" $Id$ +.\" +.Dd August 28, 1993 +.Dt SIO 4 i386 +.Os FreeBSD +.Sh NAME +.Nm sio +.Nd +fast interrupt serial communications interface +.Sh SYNOPSIS +.Cd "device sio0 at isa? port" \&"IO_COM1\&" tty irq 4 vector siointr +.Cd "device sio1 at isa? port" \&"IO_COM2\&" tty irq 3 vector siointr +.Cd "device sio2 at isa? port" \&"IO_COM3\&" tty irq 5 vector siointr +.Cd "device sio3 at isa? port" \&"IO_COM4\&" tty irq 9 vector siointr +.Sh DESCRIPTION +The +.Nm sio +driver provides support for NS8250-, NS16450-, and NS16550-based +.Tn EIA +.Tn RS-232C +.Pf ( Tn CCITT +.Tn V.28 ) +communications interfaces. The NS8250 and NS16450 have single character +buffers, and the NS16550 has a 16 character buffer. +.Pp +Input and output for each line may set to one of following baud rates; +50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, +19200, 38400, 57600, or 115200. +.Sh FILES +.Bl -tag -width Pa +.It Pa /dev/tty00 +.It Pa /dev/tty01 +.El +.Sh DIAGNOSTICS +.Bl -diag +.It sio%d: silo overflow. +The single-character input +.Dq silo +has overflowed and incoming data has been lost. +.\".It com%d: weird interrupt: %x. +.\"The device has generated an unexpected interrupt +.\"with the code listed. +.El +.Sh SEE ALSO +.Xr tty 4 +.Xr com 4 +.Sh HISTORY +The +.Nm +driver is derived from the +.Nm HP9000/300 +.Nm dca +driver and is +.Ud +.Sh BUGS +Data loss is not near as likely on busy systems as they are with the +.Xr com 4 +driver but they still can occur at very high baud rates on slow systems. +.Pp +The constants which define the locations +of the various seiral ports are holdovers from +.Nm DOS . +.Pp +As usual, you get what you pay for; cheap NS16550 clones +generally don't work. diff --git a/share/man/man4/sio.4 b/share/man/man4/sio.4 new file mode 100644 index 0000000..53efb1c --- /dev/null +++ b/share/man/man4/sio.4 @@ -0,0 +1,101 @@ +.\" Copyright (c) 1990, 1991 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. 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. +.\" +.\" from: @(#)dca.4 5.2 (Berkeley) 3/27/91 +.\" from: com.4,v 1.1 1993/08/06 11:19:07 cgd Exp +.\" $Id$ +.\" +.Dd August 28, 1993 +.Dt SIO 4 i386 +.Os FreeBSD +.Sh NAME +.Nm sio +.Nd +fast interrupt serial communications interface +.Sh SYNOPSIS +.Cd "device sio0 at isa? port" \&"IO_COM1\&" tty irq 4 vector siointr +.Cd "device sio1 at isa? port" \&"IO_COM2\&" tty irq 3 vector siointr +.Cd "device sio2 at isa? port" \&"IO_COM3\&" tty irq 5 vector siointr +.Cd "device sio3 at isa? port" \&"IO_COM4\&" tty irq 9 vector siointr +.Sh DESCRIPTION +The +.Nm sio +driver provides support for NS8250-, NS16450-, and NS16550-based +.Tn EIA +.Tn RS-232C +.Pf ( Tn CCITT +.Tn V.28 ) +communications interfaces. The NS8250 and NS16450 have single character +buffers, and the NS16550 has a 16 character buffer. +.Pp +Input and output for each line may set to one of following baud rates; +50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, +19200, 38400, 57600, or 115200. +.Sh FILES +.Bl -tag -width Pa +.It Pa /dev/tty00 +.It Pa /dev/tty01 +.El +.Sh DIAGNOSTICS +.Bl -diag +.It sio%d: silo overflow. +The single-character input +.Dq silo +has overflowed and incoming data has been lost. +.\".It com%d: weird interrupt: %x. +.\"The device has generated an unexpected interrupt +.\"with the code listed. +.El +.Sh SEE ALSO +.Xr tty 4 +.Xr com 4 +.Sh HISTORY +The +.Nm +driver is derived from the +.Nm HP9000/300 +.Nm dca +driver and is +.Ud +.Sh BUGS +Data loss is not near as likely on busy systems as they are with the +.Xr com 4 +driver but they still can occur at very high baud rates on slow systems. +.Pp +The constants which define the locations +of the various seiral ports are holdovers from +.Nm DOS . +.Pp +As usual, you get what you pay for; cheap NS16550 clones +generally don't work. |
