diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85b297615..7af2f6ed7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@
* Added support for .webp, .svg and unanimated .gif files to the slideshow screensaver when using a custom image directory
* Changed the default slideshow custom image directory from slideshow/custom_images to screensavers/custom_slideshow
* Changed the custom slideshow image directory setting from ScreensaverSlideshowImageDir to ScreensaverSlideshowCustomDir
+* Added Mednafen standalone as an alternative emulator for the gb, gba and gbc systems
* Added the .zso file extension to the ps2 system
* Added the .zar file extension to the xbox360 system on Linux and Windows
* Added the .pk3 and .ipk3 file extensions to the doom system on Linux, Unix and Windows
@@ -23,7 +24,8 @@
* (Windows) Added the %RUNINBACKGROUND% variable for the epic system
* (Windows) Removed support for building the application using MinGW
* Added a "renderDuringTransitions" property to the image element
-* Added support for the 1:1 display aspect ratio
+* Added support for more extreme vertical resolutions than previously allowed
+* Added support for the 19.5:9, 20:9 and 1:1 display aspect ratios
* Added workarounds for some mobile GPUs which do not support all OpenGL operations when using the BGRA pixel format
### Bug fixes
diff --git a/THEMES-DEV.md b/THEMES-DEV.md
index 1b7f45c3d..a87fa410b 100644
--- a/THEMES-DEV.md
+++ b/THEMES-DEV.md
@@ -878,16 +878,18 @@ The variant, color scheme and transitions names as well as their labels can be s
Unlike the types just mentioned, aspectRatio entries can not be set to arbitrary values, instead they have to use a value from the _horizontal name_ or _vertical name_ columns in the following table:
-| Horizontal name | Vertical name | Common resolutions |
-| :--------------- | :------------- | :--------------------------------------------- |
-| 16:9 | 16:9_vertical | 1280x720, 1920x1080, 2560x1440, 3840x2160 |
-| 16:10 | 16:10_vertical | 1280x800, 1440x900, 1920x1200 |
-| 3:2 | 3:2_vertical | 2160x1440 |
-| 4:3 | 4:3_vertical | 320x240, 640x480, 800x600, 1024x768, 1600x1200 |
-| 5:4 | 5:4_vertical | 1280x1024 |
-| 21:9 | 21:9_vertical | 2560x1080, 3840x1600, 5120x2160 |
-| 32:9 | 32:9_vertical | 3840x1080, 5120x1440 |
-| 1:1 | 1:1 | Any square resolution |
+| Horizontal name | Vertical name | Common resolutions |
+| :--------------- | :-------------- | :--------------------------------------------- |
+| 16:9 | 16:9_vertical | 1280x720, 1920x1080, 2560x1440, 3840x2160 |
+| 16:10 | 16:10_vertical | 1280x800, 1440x900, 1920x1200 |
+| 3:2 | 3:2_vertical | 2160x1440 |
+| 4:3 | 4:3_vertical | 320x240, 640x480, 800x600, 1024x768, 1600x1200 |
+| 5:4 | 5:4_vertical | 1280x1024 |
+| 19.5:9 | 19.5:9_vertical | 2340x1080, 2532x1170 |
+| 20:9 | 20:9_vertical | 2400x1080, 1600x720 |
+| 21:9 | 21:9_vertical | 2560x1080, 3840x1600, 5120x2160 |
+| 32:9 | 32:9_vertical | 3840x1080, 5120x1440 |
+| 1:1 | 1:1 | Any square resolution |
The 21:9 and 32:9 aspect ratios are approximate as monitors of slightly different ratios are collectively marketed using these numbers.
diff --git a/USERGUIDE-DEV.md b/USERGUIDE-DEV.md
index 99272de9d..52447e6ec 100644
--- a/USERGUIDE-DEV.md
+++ b/USERGUIDE-DEV.md
@@ -3988,9 +3988,9 @@ The **@** symbol indicates that the emulator is _deprecated_ and will be removed
| gameandwatch | Nintendo Game and Watch | MAME Local Artwork **(Standalone)** | MAME **(Standalone)**,
Handheld Electronic (GW) | No | See the specific _LCD handheld games_ section elsewhere in this guide |
| gamecom | Tiger Electronics Game.com | MAME - Current | MAME **(Standalone)** | Yes | Single archive or ROM file |
| gamegear | Sega Game Gear | Genesis Plus GX | Genesis Plus GX Wide,
Gearsystem,
SMS Plus GX,
PicoDrive,
Mednafen **(Standalone)**,
ares **(Standalone)** | No | Single archive or ROM file |
-| gb | Nintendo Game Boy | Gambatte | SameBoy,
SameBoy **(Standalone)**,
Gearboy,
Gearboy **(Standalone)** [LW],
TGB Dual,
Mesen-S,
Mesen **(Standalone)** [LW],
bsnes,
mGBA,
mGBA **(Standalone)**,
VBA-M,
VBA-M **(Standalone)**,
ares **(Standalone)**,
SkyEmu **(Standalone)** | No | Single archive or ROM file |
-| gba | Nintendo Game Boy Advance | mGBA | mGBA **(Standalone)**,
VBA-M,
VBA-M **(Standalone)**,
VBA Next,
gpSP,
ares **(Standalone)**,
SkyEmu **(Standalone)** | Yes for ares | Single archive or ROM file |
-| gbc | Nintendo Game Boy Color | Gambatte | SameBoy,
SameBoy **(Standalone)**,
Gearboy,
Gearboy **(Standalone)** [LW],
TGB Dual,
Mesen-S,
Mesen **(Standalone)** [LW],
bsnes,
mGBA,
mGBA **(Standalone)**,
VBA-M,
VBA-M **(Standalone)**,
ares **(Standalone)**,
SkyEmu **(Standalone)** | No | Single archive or ROM file |
+| gb | Nintendo Game Boy | Gambatte | SameBoy,
SameBoy **(Standalone)**,
Gearboy,
Gearboy **(Standalone)** [LW],
TGB Dual,
Mesen-S,
Mesen **(Standalone)** [LW],
bsnes,
mGBA,
mGBA **(Standalone)**,
VBA-M,
VBA-M **(Standalone)**,
Mednafen **(Standalone)**,
ares **(Standalone)**,
SkyEmu **(Standalone)** | No | Single archive or ROM file |
+| gba | Nintendo Game Boy Advance | mGBA | mGBA **(Standalone)**,
VBA-M,
VBA-M **(Standalone)**,
VBA Next,
gpSP,
Mednafen **(Standalone)**,
ares **(Standalone)**,
SkyEmu **(Standalone)** | Yes for ares | Single archive or ROM file |
+| gbc | Nintendo Game Boy Color | Gambatte | SameBoy,
SameBoy **(Standalone)**,
Gearboy,
Gearboy **(Standalone)** [LW],
TGB Dual,
Mesen-S,
Mesen **(Standalone)** [LW],
bsnes,
mGBA,
mGBA **(Standalone)**,
VBA-M,
VBA-M **(Standalone)**,
Mednafen **(Standalone)**,
ares **(Standalone)**,
SkyEmu **(Standalone)** | No | Single archive or ROM file |
| gc | Nintendo GameCube | Dolphin | Dolphin **(Standalone)**,
PrimeHack **(Standalone)** [LW],
Triforce **(Standalone)** [LW] | No | Disc image file for single-disc games, .m3u playlist for multi-disc games |
| genesis | Sega Genesis | Genesis Plus GX | Genesis Plus GX Wide,
PicoDrive,
BlastEm,
BlastEm **(Standalone)** [L],
Mednafen **(Standalone)**,
ares **(Standalone)** | No | Single archive or ROM file |
| gmaster | Hartung Game Master | MAME - Current | MAME **(Standalone)** | Yes | Single archive or ROM file |