GM-800: How to update the GM-800 firmware?

The GM-800 system program provides feature additions and improvements. We recommend first checking the currently installed firmware version and updating it as needed.

How to Check the Installed Version

1. Unplug the AC adaptor from the DC IN jack to turn off the power of the GM-800.
2. While holding down the [ EXIT ] button, turn on the power.
   **Keep holding down the EXIT button until the GM-800 logo appears on the display.**
   After a short moment, the version information will appear on the display.
3. Confirm the currently installed version, then unplug the AC adaptor from the DC IN jack to power off.

In short, the process to update is as follows. 

1. Format a USB flash drive using GM-800.
2. Upload file content downloaded from GM-800 website called "GM-800_UPA_up.bin" to the GM-800 flash drive using your macOS/Windows computer/laptop.
3. Connect GM-800 flash drive with GM-800 unit in Update Mode and initiate.

Formatting a USB flash drive

Please format the USB flash drive using the GM-800 and the following procedure.
NOTE: If the USB flash drive contains important data, be aware that this operation erases all data from the drive.

1. Choose [MENU] > “USB MEMORY”.
   If USB MEMORY is not available to access, you may be using a flash drive that is too large in file size or the drive in not connected correctly. Either us a flash drive with less file room OR unplug and plug the flash drive back in until USB MEMORY can be selected. 
   
2. Press the PAGE [<] [>] buttons to show “FORMAT”.
   
3. Press the [1] knob.
   A confirmation message appears.
   
4. Press the [4] knob to execute.
   If you decide to cancel, press knob [3].
   * When formatting is complete, the message “Completed” appears.
   * Never turn off the power or disconnect the USB flash drive during a process, such as while the “Executing…” display is shown.

UPLOAD .BIN UPDATE FILE TO THE USB FLASH DRIVE

1. Connect the USB flash drive to a USB port on your computer.
2. Download the latest version of the system program from https://www.boss.info/global/products/gm-800/downloads/, and extract it.
   • On Windows: Right-click the "gm800_sys_v***.zip" file and select "Extract All" from the menu. This will unzip the file and provide easier access to the "gm800_sys_v***" folder.
   • On Mac: Double-click the ZIP file labeled "gm800_sys_v***.zip." It should automatically unzip and create a folder with the same name.
3. Open the folder labeled "gm800_sys_v***."
   Example:
   
4. Copy the .BIN file named "GM-800_UPA_up.bin" from this folder and paste (or drag and drop) it onto the USB flash drive.
   
5. Once the file is copied over, soft Eject the USB0 flash drive from your computer and remove.

UPDATING THE HARDWARE

1. Unplug the AC adaptor from the DC IN jack to turn off the power of the GM-800.
2. Connect the USB flash drive to the USB MEMORY port on the rear panel.
   
3. While pressing the [WRITE] button, turn on the power of the GM-800.
   **Keep holding down the [WRITE] button until "GM-800 UPDATER" appears on the screen.**
   
4. Release the [WRITE] button after "GM-800 UPDATER" appears on the screen.
5. When the display indicates "UPDATE SUCCEEDED", unplug the AC adaptor from the DC IN jack to turn off the power.
6. Disconnect the USB flash drive from the USB MEMORY port.

7. Turn on the power and confirm that the update to the latest version was successful.
   See "How to Check the Installed Version".