LDK Game development notes

Toolchain / cross-compilation

• LDK Game is built off of the RS97 hardware.
• LDK Game Guide: https://boards.dingoonity.org/ingenic-jz4760-devices/ldk-game-guide/
• Flashing firmware guide: https://boards.dingoonity.org/ingenic-jz4760-devices/how-to-install-retrofw-on-your-ldkrs-97/
• The LDK community has no "best practices" and its development is heavily fragmented.
• LDK Game uses a custom buildroot implementation to enable cross compilation
• Here's the support thread for setting up the toolchain: https://boards.dingoonity.org/ingenic-jz4760-devices/retrofw-developer-support-thread/
• There is a specific toolchain snapshot that works with and it can be downloaded here: https://buildroot.org/downloads/buildroot-2018.02.9.tar.gz
• This Google Doc was published to help people setup the tool chain. It's dated, but helps explains how cross compilation works.
• The latest version of buildroot can be found here https://github.com/buildroot/buildroot
• The LDK Game uses a hacked version of SDL v1.2
• RetroFW is the authority on the LDK game. https://github.com/retrofw
• Burn and flash the latest RetroFW firmare: https://github.com/retrofw/firmware/releases/tag/1.2
• Jay has been able to compile and run a game called Zelda Roth and it can be downloaded here: https://github.com/retrofw/zelda_roth
• If you want the full 4GB game, you can download it here

Creative Engine design considerations

With the merger of this PR, Creative Engine has Display, Controller and Audio classes broken out based on Device.

- DisplayBase
        /\
        ||----- DesktopDisplay <--------------------------\
        ||----- OroidDisplay <----------------------------|-< Display (gDisplay)
        ||----- NetworkedMatrixDisplay <-( future )-------/   

• We'll likely need to follow the same pattern. For example (running on LDK Game):

- DisplayBase
        /\
        ||----- DesktopDisplay <--------------------------\
        ||----- OroidDisplay <----------------------------|
        ||----- LDKDisplay   <----------------------------|-< Display (gDisplay)
        ||----- NetworkedMatrixDisplay <-( future )-------/   

Key issues to solve for:

• Classes for Audio, Display and Controller
• Makefile conflicts (Odroid deprecated)
• How to take a binary and push it via USB to the LDK Game's SD Card
• Develop & Document toolchain for every developer
• Test Genus and Modite Adventure