emulators: added n64, ps2 and snes emulators

wiki/games/emulators.md

@@ -22,5 +22,8 @@ Emulator games can even be
 - [mGBA](/wiki/games/emulators/mgba.md) emulates Nintendo Game Boy, Game Boy Color and Game Boy Advanced
   games.
 - [Nestopia](/wiki/games/emulators/nestopia.md) emulates Nintendo Entertainment System games.
-- [PPSSPP](/wiki/games/emulators/ppsspp.md) emulates Playstation Portable games.
+- [PCSX2](/wiki/games/emulators/pcsx2.md) emulates PlayStation 2 games.
+- [PPSSPP](/wiki/games/emulators/ppsspp.md) emulates PlayStation Portable games.
+- [simple64](/wiki/games/emulators/simple64.md) emulates Nintendo 64 games.
+- [Snes9x](/wiki/games/emulators/snes9x.md) emulates Super Nintendo Entertainment System games.
 - [yuzu](/wiki/games/emulators/yuzu.md) emulates Nintendo Switch games.

wiki/games/emulators/pcsx2.md

@@ -0,0 +1,10 @@
+# PCSX2
+
+[PCSX2](https://pcsx2.net/) is a PlayStation 2 [emulator](/wiki/games/emulators.md).
+
+## Setup
+
+PCSX2 can be installed on different systems, a list for this can be found on
+the [PCSX2 website](https://pcsx2.net/downloads).
+Additionally it can be installed using [Flatpak](/wiki/linux/flatpak.md) where the
+package is called `net.pcsx2.PCSX2`.

wiki/games/emulators/ppsspp.md

@@ -1,7 +1,6 @@
 # PPSSPP
 
-[PPSSPP](https://ppsspp.org/) is a Playstation Portable (PSP)
-[emulator](/wiki/games/emulators.md).
+[PPSSPP](https://ppsspp.org/) is a PlayStation Portable [emulator](/wiki/games/emulators.md).
 
 ## Setup
 

wiki/games/emulators/simple64.md

@@ -0,0 +1,10 @@
+# simple64
+
+[simple64](https://simple64.github.io/) is a Nintendo 64 [emulator](/wiki/games/emulators.md).
+
+## Setup
+
+simple64 can be installed on different systems, a list for this can be found on
+the [simple64 website](https://simple64.github.io/).
+Additionally it can be installed using [Flatpak](/wiki/linux/flatpak.md) where the
+package is called `https://flathub.org/apps/io.github.simple64.simple64`.

wiki/games/emulators/snes9x.md

@@ -0,0 +1,11 @@
+# Snes9x
+
+[Snes9x](http://www.snes9x.com/) is a Super Nintendo Entertainment System
+[emulator](/wiki/games/emulators.md).
+
+## Setup
+
+Snes9x can be installed on different systems, a list for this can be found on
+the [Snes9x website](http://www.snes9x.com/).
+Additionally it can be installed using [Flatpak](/wiki/linux/flatpak.md) where the
+package is called `com.snes9x.Snes9x`.

wiki/linux/x_window_system.md

@@ -49,6 +49,24 @@ Section "ServerFlags"
 EndSection
 ```
 
+#### Adjust DPI and UI Scale
+
+The dots per inch (DPI) is a measurement of spatial video dot density.
+It has effect on the size of UI elements.
+It is recommended to set the DPI inside the file `~/.config/xorg/xpcspec` with the following line.
+The DPI number should be adjusted as needed.
+
+```
+Xft.dpi: 100
+```
+
+Afterwards `~/.config/xorg/xpcspec` needs to be sourced in the `~/.xinitrc` file.
+For this to work the following line needs to be added into the `~/.xinitrc` file .
+
+```sh
+[ -f "$HOME/.config/xorg/xpcspec" ] && xrdb -merge "$HOME/.config/xorg/xpcspec"
+```
+
 ### Mouse
 
 This section describes the handling of mouse by X.