feat: re-Add Pico-8 core

cores/makefile

@@ -1,7 +1,7 @@
 # this logic was broken out from picoarch's all-in-one makefile
 
 CORES = fceumm gambatte gpsp pcsx_rearmed picodrive snes9x2005_plus
-CORES+= beetle-pce-fast beetle-vb mednafen_supafaust mgba pokemini mame2003-plus # extras
+CORES+= beetle-pce-fast beetle-vb fake-08 mednafen_supafaust mgba pokemini mame2003-plus # extras
 
 ###############################
 
@@ -19,6 +19,11 @@ beetle-pce-fast_CORE = mednafen_pce_fast_libretro.so
 beetle-vb_REPO = https://github.com/libretro/beetle-vb-libretro
 beetle-vb_CORE = mednafen_vb_libretro.so
 
+fake-08_REPO = https://github.com/jtothebell/fake-08
+fake-08_CORE = fake08_libretro.so
+fake-08_BUILD_PATH = fake-08/platform/libretro
+fake-08_HASH = 6279216964e351409201e987653e3d708fd4ad78 # last known working save states
+
 fceumm_REPO = https://github.com/libretro/libretro-fceumm
 
 gambatte_REPO = https://github.com/libretro/gambatte-libretro

cores/patches/fake-08.patch

@@ -0,0 +1,34 @@
+diff --git forkSrcPrefix/platform/libretro/Makefile forkDstPrefix/platform/libretro/Makefile
+index 420f9b7..78d9b0e 100644
+--- forkSrcPrefix/platform/libretro/Makefile
++++ forkDstPrefix/platform/libretro/Makefile
+@@ -123,7 +123,16 @@ else ifeq ($(platform), miyoomini)
+    CXXFLAGS += -marm -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -march=armv7ve
+    fpic := -fPIC
+    SHARED := -shared -Wl,--version-script=link.T
+-
++else ifeq ($(platform), rg35xx)
++   TARGET := $(TARGET_NAME)_libretro.so
++   CC = $(CROSS_COMPILE)gcc
++   CXX = $(CROSS_COMPILE)g++
++   AR = $(CROSS_COMPILE)ar
++   STRIP = $(CROSS_COMPILE)strip
++   CXXFLAGS += -marm -mtune=cortex-a9 -mfpu=neon-fp16 -mfloat-abi=hard -march=armv7-a
++   CXXFLAGS += -fomit-frame-pointer -ffast-math -fno-common -ftree-vectorize -funswitch-loops
++   fpic := -fPIC
++   SHARED := -shared -Wl,--version-script=link.T
+ else ifeq ($(platform), gcw0)
+    TARGET := $(TARGET_NAME)_libretro_gcw0.so
+    CC = /opt/gcw0-toolchain/usr/bin/mipsel-linux-gcc
+diff --git forkSrcPrefix/platform/libretro/libretro.cpp forkDstPrefix/platform/libretro/libretro.cpp
+index 2b289ee..da77509 100644
+--- forkSrcPrefix/platform/libretro/libretro.cpp
++++ forkDstPrefix/platform/libretro/libretro.cpp
+@@ -475,6 +475,7 @@ EXPORT bool retro_load_game(struct retro_game_info const *info)
+         printf("using file path for rom %s\n", info->path);
+         _vm->QueueCartChange(info->path);
+     }
++    _vm->UpdateAndDraw();
+
+     return true;
+ }

makefile

@@ -85,6 +85,7 @@ bundle:
 
 	# extras
 	cp ./cores/output/mame2003_plus_libretro.so ./build/EXTRAS/Emus/rg35xx/MAME.pak
+	cp ./cores/output/fake08_libretro.so ./build/EXTRAS/Emus/rg35xx/P8.pak
 	cp ./cores/output/mgba_libretro.so ./build/EXTRAS/Emus/rg35xx/MGBA.pak
 	cp ./cores/output/mgba_libretro.so ./build/EXTRAS/Emus/rg35xx/SGB.pak
 	cp ./cores/output/mednafen_pce_fast_libretro.so ./build/EXTRAS/Emus/rg35xx/PCE.pak

skeleton/EXTRAS/Emus/rg35xx/P8.pak/default.cfg

@@ -0,0 +1,7 @@
+bind Up = UP
+bind Down = DOWN
+bind Left = LEFT
+bind Right = RIGHT
+bind A Button = A
+bind B Button = B
+bind Start = START

skeleton/EXTRAS/Emus/rg35xx/P8.pak/launch.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+EMU_EXE=fake08
+CORES_PATH=$(dirname "$0")
+
+###############################
+
+EMU_TAG=$(basename "$(dirname "$0")" .pak)
+ROM="$1"
+mkdir -p "$BIOS_PATH/$EMU_TAG"
+mkdir -p "$SAVES_PATH/$EMU_TAG"
+HOME="$USERDATA_PATH"
+cd "$HOME"
+minarch.elf "$CORES_PATH/${EMU_EXE}_libretro.so" "$ROM" &> "$LOGS_PATH/$EMU_TAG.txt"