CyanogenMod CM9(ICS)/CM10(JB)for the HP TouchPad 4G with Sierra MC7700
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System Properties (defined in /system/build.prop)
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ro.sierra.dump = 0 (default)
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  = 0: Do not dump data on the current firmware values to the radio log.
  = 1: Write extended information on the MC7700 firmware settings values to the
       radio log when the MC7700 is first initialized (on system boot).

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ro.sierra.setup = 0 (default)
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  = 0: Do not write new settings to the MC7700 module when CM10 is booted.  
  = 1: Write new values to the MC7700 module when the system is next booted.  
  
Note: The values written include default parameters included in the Sierra HAL
      and the following user selected values.  No values are written to the 
      MC7700 module if ro.sierra.setup = 0.

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ro.sierra.voice
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  = 0: Disable voice-related CnS objects in the Sierra HAL
  = 1: Enable voice-related CnS and AT objects in the Sierra HAL 

Note: If the setting is changed, the change is written to the MC7700 module
      when the system is next booted.  Implementation requires another boot.

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ro.sierra.gpssel = 1 (default)
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  = 0: GPS will use GPS antenna connection on the MC7700 module.
  = 1: GPS will use the AUX (GPS/Rx diversity) antenna on the MC7700 module.
  
Note: The setting is effective immediately after the system is booted.

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ro.sierra.nmea = 01FF (default)
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  = 01FF: All supported GPS NMEA sentences are output except for PSTIS.  
  = 001F: Only GPS satellite NMEA sentences are output (no GLONASS)

Note: The following specific NMEA sentences can be configured.

      Bit 0: GPGGA (Fix information)
      Bit 1: GPRMC (Recommended minimum data for GPS)
      Bit 2: GPGSV (Detailed satellite data)
      Bit 3: GPGSA (Overall satellite data)
      Bit 4: GPVTG (Vector track and speed over the ground)
      Bit 5: PQXFI (Proprietary Qualcomm eXtended Fix Information)*
      Bit 6: GLGSV (GLONASS GSV)
      Bit 7: GNGSA (GLONASS GSA)
      Bit 8: GNGNS (Time, position, and fixed data for GLONASS receiver)*
      Bit 13: PSTIS (GPS session start indication)*

      * PQXFI, GNGNS, and PSTIS are currently ignored by the Sierra HAL.