MEM(4)               OpenBSD Programmer's Manual (Zaurus)               MEM(4)

NAME
     mem, kmem - memory files

DESCRIPTION
     The special file /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.  Only offsets within the bounds of /dev/mem are
     allowed.

     Kernel virtual memory is accessed through the interface /dev/kmem in the
     same manner as /dev/mem.  Only kernel virtual addresses that are current-
     ly mapped to memory are allowed.

     On zaurus, physical memory is contiguous.  The kernel virtual memory be-
     gins at address 0xc0000000.

     Writeability of these devices is controlled by the system securelevel(7).

FILES
     /dev/mem
     /dev/kmem

SEE ALSO
     securelevel(7)

HISTORY
     The /dev/mem and /dev/kmem files appeared in Version 6 AT&T UNIX.

OpenBSD 4.7                      May 31, 2007                                1
