Optimize ALL emulators: align with dArkOS performance settings

Flycast (Dreamcast):
- AutoSkipFrame: 1→2 (skip up to 2 frames when behind, matches dArkOS)
- Audio backend: pulse→auto (better compatibility)

Mupen64Plus (N64):
- Resolution: 427x320→480x320 (better aspect ratio for 640x480 screens)
- PRIMARY_BUFFER_SIZE: 8192→16384 (more stable audio, matches dArkOS)
- SECONDARY_BUFFER_SIZE: 2048→1024 (lower SDL latency, matches dArkOS)

PPSSPP (PSP):
- ForceMaxEmulatedFPS: 30→0 (remove artificial cap that limited 60fps games)

GZDoom:
- Add +gl_es 1 +vid_preferbackend 3 +cl_capfps 0 flags (matches dArkOS)
  Forces OpenGL ES mode with preferred backend, uncapped FPS

RetroArch core options:
- mame2003-plus skip_warnings: disabled→enabled (faster arcade startup)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

projects/ArchR/packages/emulators/libretro/retroarch/sources/RK3326/retroarch-core-options.cfg

@@ -127,7 +127,7 @@ mame2003-plus_mame_remapping = "enabled"
 mame2003-plus_mouse_device = "mouse"
 mame2003-plus_sample_rate = "48000"
 mame2003-plus_skip_disclaimer = "disabled"
-mame2003-plus_skip_warnings = "disabled"
+mame2003-plus_skip_warnings = "enabled"
 flycast_internal_resolution = "640x480"
 flycast_alpha_sorting = "per-strip (fast, least accurate)"
 flycast_enable_dsp = "disabled"

projects/ArchR/packages/emulators/standalone/flycast-sa/config/RK3326/emu.cfg

@@ -1,10 +1,10 @@
 [audio]
-backend = pulse
+backend = auto
 
 [config]
 rend.Resolution = 480
 pvr.rend = 0
-pvr.AutoSkipFrame = 1
+pvr.AutoSkipFrame = 2
 pvr.RenderToTextureBuffer = 0
 rend.TextureUpscale = 1
 rend.Fog = 1

projects/ArchR/packages/emulators/standalone/gzdoom-sa/scripts/start_gzdoom.sh

@@ -85,4 +85,4 @@ else
 fi
 
 cd "${RUN_DIR}"
-echo ${params} | ${EMUPERF} xargs /usr/bin/gzdoom >/var/log/gzdoom.log 2>&1
+echo ${params} | ${EMUPERF} xargs /usr/bin/gzdoom +gl_es 1 +vid_preferbackend 3 +cl_capfps 0 >/var/log/gzdoom.log 2>&1

projects/ArchR/packages/emulators/standalone/mupen64plus-sa/mupen64plus-sa-core/config/RK3326/mupen64plus.cfg

@@ -18,11 +18,11 @@ DEFAULT_FREQUENCY = 33600
 # Swaps left and right channels
 SWAP_CHANNELS = False
 # Size of primary buffer in output samples. This is where audio is loaded after it's extracted from n64's memory.
-PRIMARY_BUFFER_SIZE = 8192
+PRIMARY_BUFFER_SIZE = 16384
 # Fullness level target for Primary audio buffer, in equivalent output samples. This value must be larger than the SECONDARY_BUFFER_SIZE. Decreasing this value will reduce audio latency but requires a faster PC to avoid choppiness. Increasing this will increase audio latency but reduce the chance of drop-outs.
 PRIMARY_BUFFER_TARGET = 4096
 # Size of secondary buffer in output samples. This is SDL's hardware buffer. The SDL documentation states that this should be a power of two between 512 and 8192.
-SECONDARY_BUFFER_SIZE = 2048
+SECONDARY_BUFFER_SIZE = 1024
 # Audio resampling algorithm. src-sinc-best-quality, src-sinc-medium-quality, src-sinc-fastest, src-zero-order-hold, src-linear, speex-fixed-{10-0}, trivial
 RESAMPLE = "trivial"
 # Volume control type: 1 = SDL (only affects Mupen64Plus output)  2 = OSS mixer (adjusts master PC volume)
@@ -390,7 +390,7 @@ RspPlugin = "mupen64plus-rsp-hle.so"
 [Video-General]
 
 # Width of output window or fullscreen width
-ScreenWidth = 427
+ScreenWidth = 480
 # Height of output window or fullscreen height
 ScreenHeight = 320
 # Use fullscreen mode if True, or windowed mode if False

projects/ArchR/packages/emulators/standalone/ppsspp-sa/sources/RK3326/ppsspp.ini

@@ -108,7 +108,7 @@ AutoFrameSkip = True
 FrameRate = -1
 FrameRate2 = -1
 FrameSkipUnthrottle = True
-ForceMaxEmulatedFPS = 30
+ForceMaxEmulatedFPS = 0
 AnisotropyLevel = 0
 VertexDecCache = True
 TextureBackoffCache = True