NVRAM(4,F) AIX Technical Reference NVRAM(4,F) ------------------------------------------------------------------------------- nvram PURPOSE Provides non-volatile memory image. DESCRIPTION The nvram file is used to access the system non-volatile memory. It is unique to AIX PS/2. The non-volatile memory consists of two sections: 64 bytes of real-time clock, configuration and system status information and a 2K non-volatile extension. Part of the extension area is used to log errors when the system cannot make a permanent copy of errors on the disk. Information written to this device is retained after power is removed from the system. The nvram file is not writable by user processes. The 2K extension is accessed via a readx system call with a nonzero extension parameter. An invalid virtual address used with nvram causes an error to be returned. FILE /dev/nvram Processed November 7, 1990 NVRAM(4,F) 1