MX920 Firmware History
======================
+ New feature
- Removed item
* Bug fix
/ Modified operation

v0.2.02 - Released on 21.12.2004
================================
* Corrected the operation of CTCSS decode with signals that increase in strength from
  very weak levels (RF mute closed) to nominal levels (RF mute opened).

v0.2.01 - Released on 14.10.2004
================================
+ Add 2 more default channels for alignment purposes. The new channels are ML
  and MH, making the 5 test channels Low (Ch1), Medium (Ch2), High (Ch3), Mid-Low (Ch4),
  Mid-High (Ch5).
+ Added a factory test mode which uses the 5 factory default channels for alignment
  and testing. The user configured channels are not affected when changing settings
  in the factory test mode.
+ Added channel scan mode functionality allowing the MX920 to periodically scan up to
  50 channels, with or without CTCSS. The use of CTCSS reduces the scan speed to allow
  decode of CTCSS tones.
+ Added frequency compensation for the deviation and modulation balance settings.
+ Added ability to use a plug-and-play PA. The firmware will detect EEPROM enabled PAs
  and use the frequency compensation table in the PA EEPROM or provide the ability to
  recreate the table if necessary. The PA serial number are stored in the firmware
  information block to help determine if the PA has been changed.
+ Added boot sequence progress indication via the front panel LEDs. Each LED will light
  up on successful completion of the boot sequence. Only the Power LED remains lit
  after successful completion of the boot process. Boot sequence is as follows:
    BLUE (Power LED)    - Power supply is greater than 11.7V and is stable.
    AQUA (Rx LED)       - Timers have been initialised.
    RED (Tx LED)        - UART has been initialised, I2C UART initialised
    YELLOW (Tone LED)   - FX828 initialised
    ORANGE (Alert LED)  - Model number read from I2C EEPROM
    GREEN (Repeater LED)- Radio initialised
    ALL OFF             - Boot sequence completed
    BLUE (Power LED)    - Normal operation
+ Added commands for remote configuration of radio audio, software settings, software
  switches.
+ Added ability to key in output power in Watts once the radio has been calibrated.
+ Added option to update channel information for all valid channels in the
  channel mask when prompted to update channels.
+ Added ability to process software PTT commands. PTTS1 turns on the Tx while PTTS0
  turns off the Tx.
+ Added ability to display the EEPROM contents of the PA and the motherboard.
+ Added ability to change the software channel if the front panel channel select
  switch is set to '00'. Syntax for the command is 'CHxxx', where xxx is the
  3-digit channel number. The command is not case sensitive.
* Simplex relay routines must ensure that the relay is activated once the Tx
  PLL is locked. Ignore alarms for low forward power until PA is actually active.
* Corrected the channel address calculation which prevented the use from entering
  more than 31 channels into the radio without corrupting the channel mask.
  PA temperature monitoring and fan control is now interrupt driven - based on
  Timer A0 interrupt handler.


v0.2.00 - Released on 20.05.2004
================================
+ Works in conjunction with Spectra Engineering boot monitor.
+ Added test for hook switch and accessory button.
+ Added timer to time-out menu system and return radio to normal operation.
+ Added 'RESET' command to menu system.
+ Add multiple CTCSS functionality.
/ Command processing for radio system changed to allow variable length
  commands. 'RMENU' now require a carriage return to process.
/ Changed the layout of the diagnostic screen display.
- Removed the printing of aPwr, bPwr, mRSSI and bRSSI from the calibration
  menu.

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