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 currently mapped to memory are allowed.

On the pc532, physical memory is contiguous starting at address 0x00000000, EPROM starts at 0x10000000, and devices start at 0x28000000.

FILES
/dev/mem
/dev/kmem

HISTORY
The mem, kmem files appeared in AT&T UNIX.