MD-500 System Program ( Ver.1.04 )

How to tell the version
Please check the version of the system working on your MD-500 before downloading the archive file.
  1. Hold down the [ EXIT ] button , and connect a plug to the INPUT A/MONO jack. Then it will turn on.
    * Press and hold the [ EXIT ] button until "MD-500" appears on the display.
  2. The display indicates the current system version.
  3. Disconnect the plug from the INPUT A/MONO jack.
* Don't perform the update if the product is already up-to-date.
Update history
[ Ver.1.04 ] FEB 2022
The version number has been updated due to management-related circumstances.
Product specifications are unaffected.
[ Ver.1.03 ]
  • The EFFECT B SW control fails by MIDI control change message when MODE is "A/B SIMUL."
[ Ver.1.02 ]
Additional Function
  • Support for MD-500 Editor Added

What you will need to update your MD-500
  • MD-500
  • USB cable (It must be compatible with USB 2.0 Hi-Speed.)
  • A computer with a USB 2.0 connector ( Windows, Mac )
  • AC Adaptor ( PSA Series )
Caution when performing the update
  • We recommend that you back your user data up to your computer before you perform the update. If a problem occurs and your user data is lost, you will be able to restore the data by reloading the data you saved. For details on the procedure, refer to the "Transmitting Data to an External MIDI Device" section in the owner's manual.
  • Never apply this update data to any product other than the MD-500. This update data may destroy the data or system program of other products.
  • Be sure to power the unit using the AC adaptor. Executing the update while running on only battery power may cause the update to fail and result in incorrect operation if the batteries go dead before the update finishes.
  • Never power-off your MD-500 while the update is in progress!
    If a power failure or similar accident occurs during the update process, the MD-500 won’t be able to start up in normal operating mode. This will require servicing, so you will need to contact Roland service center near you if this occurs.
  • We regret that we are unable to answer questions regarding the update procedure using this system program. Please perform the update responsibly, following the directions given in this document.
Getting the update file
Please open/extract the downloaded " " file on your computer to get the update files in the " md500_sys_v104 " folder.
Procedure for the update
* You must not do the following operations on restoring. Doing so might make your computer freeze, or might result in the loss of all of the MD-500's data.
  • Turn off the MD-500's power.
  • Disconnect the USB cable.
  • Allow your computer to enter suspend (standby) or hibernate mode, restart it, or shut it down.
  1. Connect an AC adaptor to your MD-500.
    * The MD-500 will not operate on USB bus power.
  2. Set the [ DEPTH ] knob, [ E.LEVEL ] knob, [ PARAM 1 ] knob and [ PARAM 2 ] knob to the minimum position.
  3. Hold down the [ RATE/VALUE ] knob, and connect a plug to the INPUT A/MONO jack.
    Then it will turn on and the display will indicate the "Connect the USB cable.".
  4. Use a commercially available USB cable to connect the MD-500's USB connector to your computer's USB connector.
  5. Open the "BOSS_MD500" drive.
    [ Windows users ]
    Within My Computer (or Computer), open "BOSS_MD500" (or Removable Disk).
    [ Mac OS users ]
    On the desktop, open the "BOSS_MD500" icon.
  6. Copy (drag and drop) the "MD500ROM.BIN" and the "ROMINFO.TXT" in the "md500_sys_v104" folder into the root directory of the "BOSS_MD500" drive.
  7. After the copy has been completed, unmount or remove the drive on your computer.
    With Windows
    Right-click on the "BOSS_MD500" icon in My Computer (or the "Removable Disk (*:)" icon) and execute "Eject."
    With Mac OS X
    Drag the "BOSS_MD500" icon to the Trush icon in the Dock.
  8. Disconnect the USB cable.
    The message "EDIT:EXECUTE" will appear on the display.
  9. Press [ EDIT ] button to start the update process.
    While the update is in progress, the message "Updating..." is shown on the display.
  10. The message "Completed." will appear on the display when the update process completes.
  11. After you confirm the update completion with the "Completed." indication, remove the plug from the INPUT A/MONO jack. Then it will power off.
  12. Please verify the version number "1.02" with the procedure described in "How to tell the version" part of this document.