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MEM(4)		    UNIX Programmer's Manual		   MEM(4)



[1mNAME
     [0mmem, kmem, cmos - main memory

[1mDESCRIPTION
     [0m_M_e_m 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.

     Byte addresses in _m_e_m are interpreted as physical memory
     addresses.  References to non-existent locations cause
     errors to be returned.

     The file _k_m_e_m is the same as _m_e_m except that kernel virtual
     memory rather than physical memory is accessed.  Only kernel
     virtual addresses that are mapped to memory are allowed.
     The file _c_m_o_s is a special file corresponding to the CMOS
     battery backed up memory (currently of 240 bytes) used to
     supply system bootstrap configuration parameters and the
     system console configuration parameters.

[1mFILES
     [0m/dev/mem
     /dev/kmem
     /dev/cmos































Printed 5/7/99	    Revision 1.4 of 19/10/88			1



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