BSD 4_3_Net_2 release

[unix-history] / usr / src / share / man / man4 / man4.hp300 / mem.4

diff --git a/usr/src/share/man/man4/man4.hp300/mem.4 b/usr/src/share/man/man4/man4.hp300/mem.4
index e69553d..d274804 100644 (file)
--- a/usr/src/share/man/man4/man4.hp300/mem.4
+++ b/usr/src/share/man/man4/man4.hp300/mem.4
@@ -1,39 +1,86 @@
-.\" Copyright (c) 1990 Regents of the University of California.
-.\" All rights reserved.  The Berkeley software License Agreement
-.\" specifies the terms and conditions for redistribution.
+.\" Copyright (c) 1990, 1991 Regents of the University of California.
+.\" All rights reserved.

 .\"
 .\"

-.\"    @(#)mem.4       5.1 (Berkeley) 6/29/90
+.\" 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.

 .\"
 .\"

-.TH MEM 4 "June 29, 1990"
-.UC 7
-.SH NAME
-mem, kmem \- main memory
-.SH DESCRIPTION
-.lg
-.I Mem
-is a special file that is an image of the main memory
-of the computer.
-It may be used, for example, to examine
-(and even to patch) the system.
-.PP
-Byte addresses in
-.I mem
-are interpreted as physical memory addresses.
-References to non-existent locations cause errors to be returned.
-On the HP300, the last byte of physical memory is always
-0xFFFFFFFF.
-Hence, on an HP300 with 8Mb of memory, physical memory would
-start at 0xFF800000.
-.PP
+.\" 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.
+.\"
+.\"     @(#)mem.4      5.2 (Berkeley) 3/27/91
+.\"
+.Dd March 27, 1991
+.Dt MEM 4 hp300
+.Os
+.Sh NAME
+.Nm mem ,
+.Nm kmem
+.Nd main memory
+.Sh DESCRIPTION

 The file
 The file

-.I kmem
-is the same as 
-.I mem
-except that kernel virtual memory
-rather than physical memory is accessed.
-Only kernel virtual addresses that are mapped to memory are allowed.
-On the HP300, kernel virtual memory runs from 0 to about 0x2400000.
-.SH FILES
-/dev/mem
-.br
-/dev/kmem
+.Nm /dev/mem
+is an interface to the physical memory of the
+computer.
+Byte offsets in this file are interpreted as physical memory addresses.
+Reading and writing this file is equivalent to reading and writing
+memory itself.
+An error will be returned if an attempt is made to reference
+an offset outside of
+.Nm /dev/mem .
+.Pp
+Kernel virtual memory is accessed via the file
+.Nm /dev/kmem
+in the same manner as
+.Nm /dev/mem .
+Only kernel virtual addresses that are currently mapped to memory are allowed.
+.Sh HP300
+On the
+.Tn HP300 ,
+the last byte of physical memory is always
+.Li 0xFFFFFFFF .
+Therefore, on an
+.Tn HP300
+with
+8Mb of memory, physical memory would start
+at
+.Li 0xFF800000 .
+On the
+.Tn HP300 ,
+kernel virtual memory runs from
+.Li 0
+to about
+.Li 0x2400000 .
+.Sh FILES
+.Bl -tag -width /dev/kmem -compact
+.It Pa /dev/mem
+.It Pa /dev/kmem
+.El
+.Sh HISTORY
+The files
+.Nm mem
+and
+.Nm kmem
+appeared in
+.At v6 .