hwclock - variables that affect the behaviour of the hwclock boot
    script
The /etc/default/rcS file contains variable settings in
    POSIX format:
  - 
  
- VAR=VAL
Only one assignment is allowed per line. Comments (starting with
    '#') are also allowed.
The following variables can be set.
  - BADYEAR
- This is used to specify that the hardware clock is incapable of storing
      years outside the range of 1994-1999. Set to yes if the hardware is
      broken or no if working correctly.
    
  
- HWCLOCKACCESS
- If the hardware clock is not accessible, set to no, in which case
      hwclock will not be run. Otherwise, set to yes.
    
  
- HWCLOCKPARS
- Additional options for hwclock. Unset by default. For example, this may be
      use to specify the machine hardware clock type for Alphas.
    
  
- HCTOSYS_DEVICE
- The hardware clock device you want to use. Defaults to rtc0. It
      should probably match the CONFIG_RTC_HCTOSYS_DEVICE kernel config option.
    
  
Roger Leigh <rleigh@debian.org>