Update README.md

README.md

@@ -8,7 +8,7 @@
 [![GitHub](https://img.shields.io/github/license/drhelius/Gearsystem)](https://github.com/drhelius/Gearsystem/blob/master/LICENSE)
 [![Twitter Follow](https://img.shields.io/twitter/follow/drhelius)](https://twitter.com/drhelius)
 
-Gearsystem is a very accurate, cross-platform Sega Master System / Game Gear / SG-1000 emulator written in C++ that runs on Windows, macOS, Linux, BSD, iOS, Raspberry Pi and RetroArch.
+Gearsystem is a very accurate, cross-platform Sega Master System / Game Gear / SG-1000 emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch.
 
 This is an open source project with its ongoing development made possible thanks to the support by these awesome [backers](backers.md). If you find it useful, please, consider [sponsoring](https://github.com/sponsors/drhelius).
 
@@ -47,7 +47,7 @@ Don't hesitate to report bugs or ask for new features by [openning an issue](htt
 - Save states.
 - Compressed rom support (ZIP).
 - *Game Genie* and *Pro Action Replay* cheat support.
-- Supported platforms (standalone): Windows, Linux, BSD, macOS, Raspberry Pi and iOS.
+- Supported platforms (standalone): Windows, Linux, BSD, macOS.
 - Supported platforms (libretro): Windows, Linux, macOS, Raspberry Pi, Android, iOS, tvOS, PlayStation Vita, PlayStation 3, Nintendo 3DS, Nintendo GameCube, Nintendo Wii, Nintendo WiiU, Nintendo Switch, Emscripten, Classic Mini systems (NES, SNES, C64, ...), OpenDingux, RetroFW and QNX.
 - Full debugger with just-in-time disassembler, cpu breakpoints, memory access breakpoints, code navigation (goto address, JP JR and CALL double clicking), debug symbols, memory editor, IO inspector and VRAM viewer including tiles, sprites, backgrounds and palettes.
 - Windows and Linux *Portable Mode*.
@@ -119,52 +119,22 @@ gmake
 
 ### Libretro
 
-- Ubuntu / Debian:
+- Ubuntu / Debian / Raspberry Pi Raspbian:
 
 ``` shell
-sudo apt-get install build-essential
-cd platforms/libretro
+sudo apt-get install build-essential libsdl2-dev libglew-dev
+cd platforms/linux
 make
 ```
 
 - Fedora:
 
 ``` shell
-sudo dnf install @development-tools gcc-c++
-cd platforms/libretro
-make
-```
-
-### Raspberry Pi 4 - Raspbian (Desktop)
-
-``` shell
-sudo apt install build-essential libsdl2-dev libglew-dev
-cd platforms/raspberrypi4
+sudo dnf install @development-tools gcc-c++ SDL2-devel glew-devel
+cd platforms/linux
 make
 ```
 
-### Raspberry Pi 2 & 3 - Raspbian (CLI)
-
-- Install and configure [SDL 2](http://www.libsdl.org/download-2.0.php) for development:
-
-``` shell
-sudo apt-get update
-sudo apt-get upgrade
-sudo apt-get install build-essential libfreeimage-dev libopenal-dev libpango1.0-dev libsndfile-dev libudev-dev libasound2-dev libjpeg-dev libtiff5-dev libwebp-dev automake
-cd ~
-wget https://www.libsdl.org/release/SDL2-2.0.12.tar.gz
-tar zxvf SDL2-2.0.12.tar.gz
-cd SDL2-2.0.12 && mkdir build && cd build
-../configure --disable-pulseaudio --disable-esd --disable-video-mir --disable-video-wayland --disable-video-x11 --disable-video-opengl --host=armv7l-raspberry-linux-gnueabihf
-make -j 4
-sudo make install
-```
-
-- Install libconfig library dependencies for development: `sudo apt-get install libconfig++-dev`
-- Use `make -j 4` in the `platforms/raspberrypi3/x64/` folder to build the project.
-- Use `export SDL_AUDIODRIVER=ALSA` before running the emulator for the best performance.
-- Gearsystem generates a `gearsystem.cfg` configuration file where you can customize keyboard and gamepads. Key codes are from [SDL](https://wiki.libsdl.org/SDL_Keycode).
-
 ## Accuracy Tests
 
 Zexall Z80 instruction exerciser ([from SMS Power!](http://www.smspower.org/Homebrew/ZEXALL-SMS))