FMDj

• FMDj runs Game Boy music programs inside the FM-1: LSDj the tracker and DMGo! the drum machine.
• You bring your own LSDj or DMGo ROM, and the install page puts it into the firmware over USB.
• One program is on the FM-1 at a time; install the other to change.
• PLAY starts the program and acts as START, and SEQ acts as SELECT.
• The SELECT and ALGORITHM knobs move left, right, up and down, as do the HOME, ARP, SCL and SAVE buttons.
• The top F and G keys are A and B, and holding the top F while turning a knob changes a value.
• DMGo's sixteen steps sit on the sixteen white keys, and LSDj's screen shortcuts are the PRESETS knob with OCT- and OCT+.
• REC held for a second saves to the FM-1's flash, and PLAY after power-on loads that save.

Its modes

The menu (GLO)

Press GLO to open a menu over the lower half of the screen for screen colours, the status bar and emulator options while the music plays on.

The status bar

Turn it on to see FPS, CPU and GAPS under the picture, plus the name of any emulator option left off.