added games

updated code

README.md

@@ -9,6 +9,8 @@ My modifications are trivial:
 * Change default to stretched scaling
 * Set the grayscale color palette
 
+https://vimm.net/vault/GB
+
 Below is the original readme.
 
 ---

platformio.ini

@@ -8,7 +8,7 @@ framework = arduino
 board_build.core = earlephilhower
 #board_build.filesystem_size = 512k
 
-upload_protocol = uf2
+upload_protocol = picotool
 #upload_protocol = cmsis-dap
 debug_tool = cmsis-dap
 
@@ -36,6 +36,7 @@ build_flags =
     -DENABLE_USB_STORAGE_DEVICE=0
     -DPEANUT_FULL_GBC_SUPPORT=1
     -DUSE_TINYUSB
+    -DUSE_EMBED_ROM=1
 
 [env:pico]
 extends = pico-base
@@ -47,5 +48,31 @@ board_build.filesystem_size = 1280k
 extends = pico-base
 board = rpipico2
 upload_port = /Volumes/RP2350
-# Reserve 3MB for ROMs, i.e. 1MB for code
-board_build.filesystem_size = 3072k
+# Reserve 0MB for filesystem, all 4MB available for code + ROM
+board_build.filesystem_size = 0k
+
+[env:pico2_custom_rom]
+extends = pico-base
+board = rpipico2
+upload_port = /Volumes/RP2350
+# Reserve 0MB for ROMs, i.e. 4MB for code
+board_build.filesystem_size = 0k
+build_flags =
+	-I.
+	-Isrc/tft-espi-config
+	-Ilib
+	-DENABLE_SOUND=0
+	-DENABLE_LCD=1
+	-DENABLE_SDCARD=0
+	-DENABLE_INPUT=1
+	-DENABLE_LCD_DMA=1
+	-DENABLE_LCD_FRAMEBUFFER=1
+	-DENABLE_FRAMEBUFFER_FLIP_X_Y=1
+	-DENABLE_DOUBLE_BUFFERING=1
+	-DENABLE_USB_STORAGE_DEVICE=0
+	-DPEANUT_FULL_GBC_SUPPORT=1
+	-DUSE_TINYUSB
+	-DUSE_EMBED_ROM=1
+	-DROM_FILENAME="zelda.gb"
+extra_scripts =
+	pre:scripts/embed_rom.py

scripts/embed_rom.py

@@ -0,0 +1,49 @@
+# sadly heavily based on code by chat-gpt
+# loads the original binaries into flash and allows bigger roms to load like the pokemon games
+
+import os
+
+Import("env")
+from SCons.Script import Builder
+
+# read build flags (CPP defines)
+flags = env.ParseFlags(env['BUILD_FLAGS'])
+defs = {items[0]: items[1] for items in flags.get("CPPDEFINES", {}) if isinstance(items, list) and len(items) == 2}
+
+# passed via -DROM_FILENAME=...
+rom_filename = defs.get("ROM_FILENAME", "custom_rom.gb")
+
+# Get the project root directory
+project_root = env.Dir('#').abspath
+
+# autogenerate original symbol names used by objcopy
+auto_sym_base = rom_filename.replace(".", "_").replace(" ", "_")
+
+# used to replace the symbol names
+orig_start = f"_binary_{auto_sym_base}_start"
+orig_end = f"_binary_{auto_sym_base}_end"
+
+# your preferred symbol names
+new_start = f"_binary_custom_rom_start"
+new_end = f"_binary_custom_rom_end"
+
+# Create a binary-to-object builder
+bin2obj = Builder(
+    action = (
+        "arm-none-eabi-objcopy -I binary -O elf32-littlearm -B arm "
+        "--rename-section .data=.rodata,alloc,load,readonly,data,contents "
+        "--set-section-alignment .rodata=4 "
+        f"--redefine-sym {orig_start}={new_start} "
+        f"--redefine-sym {orig_end}={new_end} "
+        "$SOURCE $TARGET"
+    ),
+    suffix = ".o",
+    src_suffix = ".gb"
+)
+
+env.Append(BUILDERS = {"BinToObj": bin2obj})
+
+# Convert ROM into an object file and link it in
+rom_path = os.path.join(project_root, rom_filename)
+rom_obj = env.BinToObj(rom_path) # produces custom_rom.gb.o
+env.Append(LIBS=[rom_obj])

src/gb.cpp

@@ -14,8 +14,13 @@ uint8_t ram[RAM_SIZE];
 
 // Definition of ROM data
 #if !ENABLE_SDCARD
+#if !USE_EMBED_ROM
+extern const uint8_t _binary_custom_rom_start[];
+const uint8_t* rom = _binary_custom_rom_start;
+#else
 #include "game_bin.h"
 const uint8_t *rom = GAME_DATA;
+#endif
 #else
 /** Definition of ROM data
  * We're going to erase and reprogram the region defines as "Filesystem" in platformio.ini (see board_build.filesystem_size).

src/tft-espi-config/tft_setup.h

@@ -50,7 +50,7 @@
 // For ST7735, ST7789 and ILI9341 ONLY, define the colour order IF the blue and red are swapped on your display
 // Try ONE option at a time to find the correct colour order for your display
 //  #define TFT_RGB_ORDER TFT_RGB  // Colour order Red-Green-Blue
-//  #define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red
+#define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red
 
 // For ST7789, ST7735, ILI9163 and GC9A01 ONLY, define the pixel width and height in portrait orientation
 // #define TFT_WIDTH  80