mem - physical memory interface
The mem character special device file provides access to
physical main memory.
Byte addresses in mem are equivalent to physical memory in
RAM. References to I/O space addresses or to nonexistent
RAM will return errors. Write accesses to console or PAL
memory will also return errors.
Because memory is read and written in aligned quadwords
(eight contiguous bytes), writing fewer than all the bytes
in an aligned quadword is a read-modify-write operation
that is not protected against concurrent writes to the
same quadword.
/dev/mem
kmem(7)
mem(7)
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