mem(7) Miscellaneous Information Manual mem(7)
NAME
mem - physical memory interface
DESCRIPTION
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.
RESTRICTIONS
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.
FILES
/dev/mem
RELATED INFORMATION
kmem(7) delim off
mem(7)
