Use the following steps to display the ROM version number of the RD-150's
operating system:
1. Power on while holding POP PIANO.
2. The ROM version number will be displayed in the window.
3. Turn power off and back on to return to normal mode.
operating system:
1. Power on while holding POP PIANO.
2. The ROM version number will be displayed in the window.
3. Turn power off and back on to return to normal mode.