SugarPi is an implementation of Sugarbox for bare-metal raspberry Pi. By now, the emulator is working correctly on Raspberry Pi3(+), and more or less on Raspberry Pi4. I didn't have a chance to test on Pi2 or 400.

As a first version, it emulatse an Amstrad 6128+ without disk drive nor keyboard (so , a kind of Gx4000 with 128 KB).

It uses the great Circle++ library as a pseudo-os basis.

• Unzip the zip file to an empty SD card.
• Fill the CART folder with you favorite CPR files
• Insert the SD card in your Raspberry Pi3
• Power it : The Amstrad will be immediately displayed.

You should have an USB joypad plugged. I tested it with my XBox pad successfully. A and X button act as button 1 and 2 from the Amstrad pad. Directional pad is used for controler. Start is pause, and Select as a way to go into SugarPi settings.

From anytime, push Select button : it will bring the settings menu on the screen. From here, you can :

• Select a cartridge to load : Go into "select cartridge" menu. It will display the CPR files from your CART folder. Select one, then press A : It will load the cartridge, and reset the computer. Note : On the next SugarPi power on, this cartridge will be the default one.
• Select the synchronisation type :
  • Frame sync will synchronise with the frame. It means that the synchronisation will be smooth, but the timings (and the sound) will be (almost) correct, as long as you are plugged on a 50hz monitor or TV.
  • If frame sync is unchecked, synchronisation will be done on sound : Sound should be more precise, but you can experience some tearing on the display.

SugarPi was developped on the Raspberry Pi3B+. It has been adapted to Raspeberry Pi4. I didn't test it on Raspberry Pi400, but as Circle++ doesn't support it, it may not work on it.

Gamepads are supported through gamecontrollerdb.txt. If your hardware is not supported yet, add a line in the 'Linux' section (see Gamecontrollerdb.txt for more information). In the future, I'll try to stick to the gamecontrollerdb.txt repository.

• Some gamepads are not properly supported on Raspberry Pi4 (XBox 360, ...).
• Raspberry Pi4 may experience slowdowns

• Circle++ library for bare-metal projects on Raspberry Pi
• Gamecontrollerdb.txt for gamepad mapping support
• Sugarbox Core library for Amstrad CPC core emulation