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Annotation of cci/usr/src/man/man4/mem.4, revision 1.1

1.1     ! root        1: .TH MEM 4 
        !             2: .UC 4
        !             3: .SH NAME
        !             4: mem, kmem \- main memory
        !             5: .SH DESCRIPTION
        !             6: .lg
        !             7: .I Mem
        !             8: is a special file that is an image of the main memory
        !             9: of the computer.
        !            10: It may be used, for example, to examine
        !            11: (and even to patch) the system.
        !            12: .PP
        !            13: Byte addresses in
        !            14: .I mem
        !            15: are interpreted as physical memory addresses.
        !            16: References to non-existent locations cause errors to be returned.
        !            17: .PP
        !            18: Examining and patching device registers is likely
        !            19: to lead to unexpected results when read-only or write-only
        !            20: bits are present.
        !            21: .PP
        !            22: The file
        !            23: .I kmem
        !            24: is the same as 
        !            25: .I mem
        !            26: except that kernel virtual memory
        !            27: rather than physical memory is accessed.
        !            28: .PP
        !            29: On TAHOE, the I/O page
        !            30: begins at physical address 0xfff00000 of
        !            31: .I kmem
        !            32: and per-process data for the current process
        !            33: begins at virtual 0xbffff000.
        !            34: .SH FILES
        !            35: /dev/mem,
        !            36: /dev/kmem
        !            37: .SH BUGS
        !            38: Memory files are accessed one byte
        !            39: at a time, an inappropiate method for some
        !            40: device registers.

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