1.2

.github/workflows/build.yaml

@@ -0,0 +1,179 @@
+name: Build release ZIP
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version for ZIP filename, e.g. v1.2.3'
+        required: false
+        default: manual
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  build-gba:
+    name: Build GBA ROM
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Build lk_multimenu.gba with devkitPro
+        run: |
+          docker run --rm \
+            -v "${{ github.workspace }}:/workspace" \
+            -w /workspace \
+            devkitpro/devkitarm:latest \
+            bash -lc 'make clean && make'
+
+      - name: Verify GBA output
+        run: test -f rom_builder/lk_multimenu.gba
+
+      - name: Upload GBA artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: gba-rom
+          path: rom_builder/lk_multimenu.gba
+          if-no-files-found: error
+
+  build-rom-builder:
+    name: Build rom_builder.exe
+    runs-on: windows-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+
+      - name: Install PyInstaller
+        run: python -m pip install --upgrade pip pyinstaller
+
+      - name: Build rom_builder.exe
+        run: pyinstaller --noconfirm --clean --onefile --console --name rom_builder rom_builder/rom_builder.py
+
+      - name: Verify EXE output
+        shell: pwsh
+        run: |
+          if (-not (Test-Path "dist/rom_builder.exe")) {
+            throw "dist/rom_builder.exe was not created"
+          }
+
+      - name: Upload EXE artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: rom-builder-exe
+          path: dist/rom_builder.exe
+          if-no-files-found: error
+
+  package:
+    name: Package ZIP
+    runs-on: windows-latest
+    needs:
+      - build-gba
+      - build-rom-builder
+    permissions:
+      contents: write
+      actions: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Download GBA artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: gba-rom
+          path: artifacts/gba
+
+      - name: Download EXE artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: rom-builder-exe
+          path: artifacts/exe
+
+      - name: Determine ZIP name
+        id: package_name
+        shell: pwsh
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          RELEASE_VERSION: ${{ github.event.release.tag_name }}
+          MANUAL_VERSION: ${{ inputs.version }}
+          REF_NAME: ${{ github.ref_name }}
+        run: |
+          $ErrorActionPreference = "Stop"
+
+          if ($env:EVENT_NAME -eq "release") {
+            $version = $env:RELEASE_VERSION
+          } else {
+            $version = $env:MANUAL_VERSION
+            if ([string]::IsNullOrWhiteSpace($version)) {
+              $version = $env:REF_NAME
+            }
+          }
+
+          $safeVersion = $version -replace '[^A-Za-z0-9._-]', '_'
+          $zipName = "lk_multimenu_rom_builder_$safeVersion.zip"
+          $zipPath = "release/$zipName"
+
+          "version=$safeVersion" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
+          "zip_name=$zipName" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
+          "zip_path=$zipPath" | Out-File -FilePath $env:GITHUB_OUTPUT -Append
+
+          Write-Host "ZIP file: $zipName"
+
+      - name: Create release ZIP
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = "Stop"
+
+          $packageDir = "package"
+          $releaseDir = "release"
+          $zipPath = "${{ steps.package_name.outputs.zip_path }}"
+
+          Remove-Item $packageDir, $releaseDir -Recurse -Force -ErrorAction SilentlyContinue
+          New-Item -ItemType Directory -Force -Path $packageDir, "$packageDir/roms", $releaseDir | Out-Null
+
+          Copy-Item "rom_builder/bg.png" "$packageDir/bg.png" -Force
+          Copy-Item "rom_builder/rom_builder.py" "$packageDir/rom_builder.py" -Force
+          Copy-Item "artifacts/gba/lk_multimenu.gba" "$packageDir/lk_multimenu.gba" -Force
+          Copy-Item "artifacts/exe/rom_builder.exe" "$packageDir/rom_builder.exe" -Force
+
+          if (Test-Path "rom_builder/roms") {
+            Copy-Item "rom_builder/roms/*" "$packageDir/roms/" -Recurse -Force -ErrorAction SilentlyContinue
+          }
+
+          if (-not (Get-ChildItem "$packageDir/roms" -Force -ErrorAction SilentlyContinue)) {
+            New-Item -ItemType File -Path "$packageDir/roms/- ROM files go here -" -Force | Out-Null
+          }
+
+          Compress-Archive -Path "$packageDir/*" -DestinationPath $zipPath -Force
+
+          Write-Host "ZIP contents:"
+          Add-Type -AssemblyName System.IO.Compression.FileSystem
+          [System.IO.Compression.ZipFile]::OpenRead($zipPath).Entries.FullName | Sort-Object | ForEach-Object { Write-Host $_ }
+
+      - name: Upload workflow artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ steps.package_name.outputs.zip_name }}
+          path: ${{ steps.package_name.outputs.zip_path }}
+          if-no-files-found: error
+
+      - name: Attach ZIP to GitHub Release
+        if: github.event_name == 'release'
+        shell: pwsh
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: gh release upload '${{ github.event.release.tag_name }}' '${{ steps.package_name.outputs.zip_path }}' --clobber

README.md

@@ -19,10 +19,12 @@ The following section must be edited in order to specify the cartridge type to u
 	"min_rom_size": 4194304
 },
 ```
-Set `type` to `1` or `2`:
+Set `type` to one of these:
 - `1` = MSP55LV100S (e.g. The Legend of Zelda Collection - Classic Edition 7-in-1, 64 MiB)
 - `2` = 6600M0U0BE (e.g. 369IN1 2048M, 256 MiB)
 - `3` = MSP54LV100 (e.g. The Legend of Zelda Collection - Classic Edition 7-in-1, 128 MiB)
+- `4` = F0095H0 (e.g. 53 in one 4G, 512 MiB)
+- `5` = GL04GR00FHCR2 (e.g. 369IN1 2048M, 256 MiB, 2026)
 
 Set `battery_present` to `true` or `false`. This will enable enhanced save data handling which will only be functional with a working battery.
 
@@ -51,7 +53,7 @@ In the `games` section, you can edit the game-related stuff:
   - `6` = Pokémon Black & White condensed battle font
 - `save_slot` defines which save slot your game uses. Set it to `null` for no saving or a number starting from `1`. Multiple games can share a save slot.
 - `map_256m`, if set to `true`, can serve as a workaround for a glitch with the cartridge mapper that causes games to freeze with screeching noises upon launch.
-- `keys` will let you specify a list of keys that must be held down at startup for this ROM to appear in the menu, e. g. `[ "L", "R", "DOWN" ]`.
+- `keys` will let you specify a list of keys that must be held down at startup for this ROM to appear in the menu, e.g. `[ "L", "R", "DOWN" ]`.
 
 ### ROM Builder Command Line Arguments
 
@@ -62,6 +64,7 @@ No command line arguments are required for creating a compilation, however there
 --no-wait               don't wait for user input when finished
 --no-log                don't write a log file
 --config config.json    sets the config file to use
+--bg bg.png             sets the background image to use
 --output output.gba     sets the file name of the compilation ROM
 ```
 
@@ -72,9 +75,7 @@ No command line arguments are required for creating a compilation, however there
 - up to 64 KiB of save data per ROM
 
 ### Save Data
-If the cartridge has a battery installed, the ROMs must be SRAM-patched with [GBATA](https://www.romhacking.net/utilities/601/) for saving to work.
-
-If the cartridge has no battery installed, the ROMs must be patched for batteryless SRAM saving with maniac's [Automatic batteryless saving patcher](https://github.com/metroid-maniac/gba-auto-batteryless-patcher/).
+If the cartridge has a battery installed, the ROMs must be SRAM-patched for saving to work. If the cartridge has no battery installed, the ROMs must be patched for the Batteryless SRAM method. If your cartridge has the GL04GR00FHCR2 flash chip or similar, the ROMs must be patched for slower cartridge access timing (waitstate). The [GBA Save Type Patcher](https://lesserkuma.github.io/GBA_Save_Type_Patcher/) offers these options.
 
 On battery-equipped cartridges, when starting a game from the menu, the previously played game's save data will be read from SRAM and stored to permanent flash memory. To skip this, you can hold the SELECT button while starting the game.
 
@@ -83,11 +84,13 @@ Tested repro cartridges:
 - 100SOP with MSP55LV100S
 - 100BS6600_48BALL_V4 with 6600M0U0BE
 - SUN100S_MSP54_XXX_BGA48 with MSP54LV100
+- F0095_4G_V1 with F0095H0
+- ACAM_GL04G10_2G_204 with GL04GR00FHCR2
 
-The generated compilation ROM can be written and read using a [GBxCart RW v1.4+](https://www.gbxcart.com/) device by insideGadgets and the [FlashGBX](https://github.com/lesserkuma/FlashGBX) software.
+The generated compilation ROM can be written and read using a compatible cart flasher device and the [FlashGBX](https://github.com/lesserkuma/FlashGBX) software.
 
 ## Thanks
-Thanks to FraX, Ausar, liuyunx, BennVenn, Jenetrix
+Thanks to FraX, Ausar, liuyunx, BennVenn, Jenetrix, Matt
 
 ## Screenshots
 

rom_builder/rom_builder.py

@@ -5,7 +5,7 @@
 import sys, os, glob, json, math, re, struct, hashlib, argparse, datetime
 
 # Configuration
-app_version = "0.11"
+app_version = "1.2"
 default_file = "LK_MULTIMENU_<CODE>.gba"
 
 ################################
@@ -14,7 +14,6 @@ def UpdateSectorMap(start, length, c):
 	sector_map[start + 1:start + length] = c * (length - 1)
 	sector_map[start] = c.upper()
 
-
 def formatFileSize(size):
 	if size == 1:
 		return "{:d} Byte".format(size)
@@ -57,6 +56,18 @@ cartridge_types = [
 		"sector_size":0x20000,
 		"block_size":0x80000,
 	},
+	{
+		"name":"F0095H0",
+		"flash_size":0x20000000,
+		"sector_size":0x40000,
+		"block_size":0x80000,
+	},
+	{
+		"name":"GL04GR00FHCR2",
+		"flash_size":0x10000000,
+		"sector_size":0x20000,
+		"block_size":0x80000,
+	},
 ]
 now = datetime.datetime.now()
 log = ""
@@ -68,6 +79,7 @@ parser.add_argument("--split", help="splits output files into 32 MiB parts", act
 parser.add_argument("--no-wait", help="don’t wait for user input when finished", action="store_true", default=False)
 parser.add_argument("--no-log", help="don’t write a log file", action="store_true", default=False)
 parser.add_argument("--config", type=str, default="config.json", help="sets the config file to use")
+parser.add_argument("--bg", type=str, help="sets the background image to use")
 parser.add_argument("--output", type=str, default=default_file, help="sets the file name of the compilation ROM")
 args = parser.parse_args()
 output_file = args.output
@@ -153,7 +165,36 @@ sector_map = list("." * sector_count)
 
 # Read menu ROM
 with open("lk_multimenu.gba", "rb") as f:
-	menu_rom = f.read()
+	menu_rom = bytearray(f.read())
+	menu_rom += bytearray([0xFF] * ((len(menu_rom) + 0x10 - (len(menu_rom) % 0x10)) - len(menu_rom)))
+	menu_rom += bytearray([0xFF] * 0x20)
+	build_timestamp_offset = len(menu_rom) - 0x20
+	build_timestamp = datetime.datetime.now().astimezone().replace(microsecond=0).isoformat().encode("ASCII")
+	menu_rom[build_timestamp_offset:build_timestamp_offset+len(build_timestamp)] = build_timestamp
+
+# Change background image
+if args.bg or os.path.exists("bg.png"):
+	try:
+		from PIL import Image
+		if args.bg:
+			img = Image.open(args.bg)
+		else:
+			img = Image.open("bg.png")
+		img = img.convert('P')
+		palette = img.getpalette()
+		palette_rgb555 = [((b >> 3) << 10) | ((g >> 3) << 5) | (r >> 3) for r, g, b in zip(palette[::3], palette[1::3], palette[2::3])]
+		raw_bitmap = bytearray(list(img.tobytes()))
+		raw_palette = bytearray(0x200)
+		pos = 0
+		for color in palette_rgb555:
+			raw_palette[pos:pos+2] = struct.pack("<H", color)
+			pos += 2
+		menu_rom_bg_offset = menu_rom.find(b"RTFN\xFF\xFE") - 0x9800
+		menu_rom[menu_rom_bg_offset:menu_rom_bg_offset+0x9600] = raw_bitmap
+		menu_rom[menu_rom_bg_offset+0x9600:menu_rom_bg_offset+0x9800] = raw_palette
+	except ImportError:
+		print("Error: Couldn’t update background image. Pillow library is not installed.")
+
 menu_rom_size = menu_rom.find(b"dkARM\0\0\0") + 8
 compilation[0:len(menu_rom)] = menu_rom
 UpdateSectorMap(start=0, length=math.ceil(len(menu_rom) / sector_size), c="m")
@@ -314,11 +355,11 @@ logp("{:.2f}% ({:d} of {:d} sectors) used\n".format(sectors_used / sector_count
 logp(f"Added {len(games)} ROM(s) to the compilation\n")
 
 if battery_present:
-	logp     ("    | Offset    | Map Size  | Save Slot      | Title")
-	toc_sep = "----+-----------+-----------+----------------+---------------------------------"
+	logp     ("    | Offset     | Map Size  | Save Slot      | Title")
+	toc_sep = "----+------------+-----------+----------------+--------------------------------"
 else:
-	logp     ("    | Offset    | Map Size  | Title")
-	toc_sep = "----+-----------+-----------+--------------------------------------------------"
+	logp     ("    | Offset     | Map Size  | Title")
+	toc_sep = "----+------------+-----------+-------------------------------------------------"
 
 item_list = bytearray()
 
@@ -331,9 +372,9 @@ for key in roms_keys:
 		if len(title) > 0x30: title = title[:0x2F] + "…"
 		
 		table_line = \
-					f"{game['index'] + 1:3d} | " \
-					f"0x{game['block_offset'] * block_size:07X} | "\
-					f"0x{game['block_count'] * block_size:07X} | "
+					f"{game['index'] + 1:3d} | " + \
+					f"0x{game['block_offset'] * block_size:X} | ".rjust(13, " ") + \
+					f"0x{game['block_count'] * block_size:X} | ".rjust(12, " ")
 		if battery_present:
 			if game['save_type'] > 0:
 				table_line += f"{game['save_slot']+1:2d} (0x{(save_data_sector_offset + game['save_slot']) * sector_size:07X}) | "
@@ -372,14 +413,18 @@ for i in range(0xA0, 0xBD):
 checksum = (checksum - 0x19) & 0xFF
 compilation[0xBD] = checksum
 logp("")
-logp("Menu ROM:        0x{:07X}–0x{:07X}".format(0, len(menu_rom)))
-logp("Game List:       0x{:07X}–0x{:07X}".format(item_list_offset * sector_size, item_list_offset * sector_size + len(item_list)))
-logp("Status Area:     0x{:07X}–0x{:07X}".format(status_offset * sector_size, status_offset * sector_size + 0x1000))
+logp("Menu ROM:        0x{:08X}–0x{:08X}".format(0, len(menu_rom)))
+logp("Game List:       0x{:08X}–0x{:08X}".format(item_list_offset * sector_size, item_list_offset * sector_size + len(item_list)))
+logp("Status Area:     0x{:08X}–0x{:08X}".format(status_offset * sector_size, status_offset * sector_size + 0x1000))
 logp("")
 logp("Cartridge Type:  {:d} ({:s}) {:s}".format(cartridge_type + 1, cartridge_types[cartridge_type]["name"], "with battery" if battery_present else "without battery"))
 logp("Output ROM Size: {:.2f} MiB".format(rom_size / 1024 / 1024))
 logp("Output ROM Code: {:s}".format(rom_code))
+if cartridge_type + 1 == 5:
+	logp("")
+	logp("Note: The GL04GR00FHCR2 flash chip may be too slow to work with most commercial games. Games may need to be patched for slower access timing via the Waitstate Control register.")
 output_file = output_file.replace("<CODE>", rom_code)
+
 if args.split:
 	for i in range(0, math.ceil(flash_size / 0x2000000)):
 		pos = i * 0x2000000

source/flash.c

@@ -14,6 +14,7 @@ u8 flash_type;
 u8 *itemlist;
 u16 itemlist_offset;
 u32 flash_sector_size;
+u16 flash_buffer_size;
 u32 flash_itemlist_sector_offset;
 u32 flash_status_sector_offset;
 u32 flash_save_sector_offset;
@@ -47,6 +48,7 @@ IWRAM_CODE void FlashDetectType(void)
 		REG_IE = ie;
 		flash_type = 1;
 		flash_sector_size = 0x40000;
+		flash_buffer_size = 0x400;
 		FlashCalcOffsets();
 		return;
 	}
@@ -63,11 +65,13 @@ IWRAM_CODE void FlashDetectType(void)
 		REG_IE = ie;
 		flash_type = 2;
 		flash_sector_size = 0x20000;
+		flash_buffer_size = 0x20;
 		FlashCalcOffsets();
 		return;
 	}
 
 	// 1G cart with MSP54LV100S (Zelda Classic Collection 7-in-1)
+	// 2G cart with GL04GR00FHCR2 (369-in-1)
 	_FLASH_WRITE(0, 0xF0);
 	_FLASH_WRITE(0xAAA, 0xA9);
 	_FLASH_WRITE(0x555, 0x56);
@@ -76,9 +80,20 @@ IWRAM_CODE void FlashDetectType(void)
 	_FLASH_WRITE(0, 0xF0);
 	if (data == 0x227D0002)
 	{
+		_FLASH_WRITE(0xAA, 0x98);
+		data = *(vu32 *)(AGB_ROM+0x54) & 0xFFFF;
+		if (((*(vu16 *)(AGB_ROM+0x20) & 0xFF) == 'R') &&
+			((*(vu16 *)(AGB_ROM+0x22) & 0xFF) == 'Q') &&
+			((*(vu16 *)(AGB_ROM+0x24) & 0xFF) == 'Z'))
+		{
+			data = (data & ~3U) | ((data & 1) << 1) | ((data & 2) >> 1);
+		}
+		_FLASH_WRITE(0, 0xF0);
+
 		REG_IE = ie;
 		flash_type = 3;
 		flash_sector_size = 0x20000;
+		flash_buffer_size = 1 << data;
 		FlashCalcOffsets();
 		return;
 	}
@@ -165,33 +180,35 @@ IWRAM_CODE void FlashWriteData(u32 address, u32 length)
 		FlashDetectType();
 	}
 	u8 _flash_type = flash_type;
+	u16 _flash_buffer_size = flash_buffer_size;
+	u16 _flash_buffer_count = (_flash_buffer_size >> 1) - 1;
 	vu16 *p_rom = (vu16 *)(AGB_ROM + address);
 	vu16 ie = REG_IE;
 	REG_IE = ie & 0xFFFE;
 
 	if (_flash_type == 1)
 	{
-		for (int j = 0; j < (int)(length / 0x400); j++)
+		for (int j = 0; j < (int)(length / _flash_buffer_size); j++)
 		{
-			_FLASH_WRITE(address + (j * 0x400), 0xEA);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), 0xEA);
 			while (1)
 			{
 				__asm("nop");
-				if ((p_rom[(j * 0x200)] & 0x80) == 0x80)
+				if ((p_rom[(j * (_flash_buffer_size >> 1))] & 0x80) == 0x80)
 				{
 					break;
 				}
 			}
-			_FLASH_WRITE(address + (j * 0x400), 0x1FF);
-			for (int i = 0; i < 0x400; i += 2)
+			_FLASH_WRITE(address + (j * _flash_buffer_size), _flash_buffer_count);
+			for (int i = 0; i < _flash_buffer_size; i += 2)
 			{
-				_FLASH_WRITE(address + (j * 0x400) + i, data_buffer[(j * 0x400) + i + 1] << 8 | data_buffer[(j * 0x400) + i]);
+				_FLASH_WRITE(address + (j * _flash_buffer_size) + i, data_buffer[(j * _flash_buffer_size) + i + 1] << 8 | data_buffer[(j * _flash_buffer_size) + i]);
 			}
-			_FLASH_WRITE(address + (j * 0x400), 0xD0);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), 0xD0);
 			while (1)
 			{
 				__asm("nop");
-				if ((p_rom[(j * 0x200)] & 0x80) == 0x80)
+				if ((p_rom[(j * (_flash_buffer_size >> 1))] & 0x80) == 0x80)
 				{
 					break;
 				}
@@ -201,24 +218,24 @@ IWRAM_CODE void FlashWriteData(u32 address, u32 length)
 	}
 	else if (_flash_type == 2)
 	{
-		for (int j = 0; j < (int)(length / 0x20); j++)
+		for (int j = 0; j < (int)(length / _flash_buffer_size); j++)
 		{
 			_FLASH_WRITE(0xAAA, 0xAAA9);
 			_FLASH_WRITE(0x555, 0x5556);
-			_FLASH_WRITE(address + (j * 0x20), 0x2526);
-			_FLASH_WRITE(address + (j * 0x20), 0x0F0F);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), 0x2526);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), _flash_buffer_count | (_flash_buffer_count << 8));
 			u16 data = 0;
-			for (int i = 0; i < 0x20; i += 2)
+			for (int i = 0; i < _flash_buffer_size; i += 2)
 			{
 				__asm("nop");
-				data = data_buffer[(j * 0x20) + i + 1] << 8 | data_buffer[(j * 0x20) + i];
-				_FLASH_WRITE(address + (j * 0x20) + i, data);
+				data = data_buffer[(j * _flash_buffer_size) + i + 1] << 8 | data_buffer[(j * _flash_buffer_size) + i];
+				_FLASH_WRITE(address + (j * _flash_buffer_size) + i, data);
 			}
-			_FLASH_WRITE(address + (j * 0x20), 0x292A);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), 0x292A);
 			while (1)
 			{
 				__asm("nop");
-				if (p_rom[(j * 0x10) + 0x0F] == data)
+				if (p_rom[(j * (_flash_buffer_size >> 1)) + ((_flash_buffer_size >> 1) - 1)] == data)
 				{
 					break;
 				}
@@ -228,24 +245,24 @@ IWRAM_CODE void FlashWriteData(u32 address, u32 length)
 	}
 	else if (_flash_type == 3)
 	{
-		for (int j = 0; j < (int)(length / 0x40); j++)
+		for (int j = 0; j < (int)(length / _flash_buffer_size); j++)
 		{
 			_FLASH_WRITE(0xAAA, 0xA9);
 			_FLASH_WRITE(0x555, 0x56);
-			_FLASH_WRITE(address + (j * 0x40), 0x26);
-			_FLASH_WRITE(address + (j * 0x40), 0x1F);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), 0x26);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), _flash_buffer_count);
 			u16 data = 0;
-			for (int i = 0; i < 0x40; i += 2)
+			for (int i = 0; i < _flash_buffer_size; i += 2)
 			{
 				__asm("nop");
-				data = data_buffer[(j * 0x40) + i + 1] << 8 | data_buffer[(j * 0x40) + i];
-				_FLASH_WRITE(address + (j * 0x40) + i, data);
+				data = data_buffer[(j * _flash_buffer_size) + i + 1] << 8 | data_buffer[(j * _flash_buffer_size) + i];
+				_FLASH_WRITE(address + (j * _flash_buffer_size) + i, data);
 			}
-			_FLASH_WRITE(address + (j * 0x40), 0x2A);
+			_FLASH_WRITE(address + (j * _flash_buffer_size), 0x2A);
 			while (1)
 			{
 				__asm("nop");
-				if (p_rom[(j * 0x20) + 0x1F] == data)
+				if (p_rom[(j * (_flash_buffer_size >> 1)) + ((_flash_buffer_size >> 1) - 1)] == data)
 				{
 					break;
 				}
@@ -337,9 +354,19 @@ IWRAM_CODE u8 BootGame(ItemConfig config, FlashStatus status)
 	REG_IE = 0;
 
 	// Set mapper configuration
-	*(vu8 *)MAPPER_CONFIG1 = ((config.rom_offset / 0x40) & 0xF) << 4; // flash bank (0~7)
-	*(vu8 *)MAPPER_CONFIG2 = 0x40 + (config.rom_offset % 0x40);		  // ROM offset (in 512 KB blocks) within current flash bank
-	*(vu8 *)MAPPER_CONFIG3 = 0x40 - config.rom_size;				  // accessible ROM size (in 512 KB blocks)
+	u8 mapper_config1 = ((config.rom_offset / 0x40) & 0xF) << 4;	// flash bank (0~7)
+	u8 mapper_config2 = 0x40 + (config.rom_offset % 0x40);			// ROM offset (in 512 KB blocks) within current flash bank
+	u8 mapper_config3 = 0x40 - config.rom_size;						// accessible ROM size (in 512 KB blocks)
+	u8 mapper_lock = mapper_config2 | 0x80;
+
+	*(vu8 *)MAPPER_CONFIG1 = mapper_config1;
+	__asm volatile("nop");
+	*(vu8 *)MAPPER_CONFIG2 = mapper_config2;
+	__asm volatile("nop");
+	*(vu8 *)MAPPER_CONFIG3 = mapper_config3;
+	__asm volatile("nop");
+	*(vu8 *)MAPPER_CONFIG2 = mapper_lock;
+	__asm volatile("nop");
 
 	// Wait until menu ROM is no longer visible
 	u32 timeout = 0x2FFF;

source/main.c

@@ -29,6 +29,7 @@ extern u8 *itemlist;
 extern u8 flash_type;
 extern u16 itemlist_offset;
 extern u32 flash_sector_size;
+extern u16 flash_buffer_size;
 extern u32 flash_itemlist_sector_offset;
 extern u32 flash_status_sector_offset;
 extern u32 flash_save_sector_offset;
@@ -118,19 +119,6 @@ int main(void) {
 		}
 	}
 
-	memcpy(&sFlashStatus, (void *)(AGB_ROM + flash_status_sector_offset * flash_sector_size), sizeof(sFlashStatus));
-	if ((sFlashStatus.magic != MAGIC_FLASH_STATUS) || (sFlashStatus.last_boot_menu_index >= roms_total)) {
-		sFlashStatus.magic = MAGIC_FLASH_STATUS;
-		sFlashStatus.version = 0;
-		sFlashStatus.battery_present = 1;
-		sFlashStatus.last_boot_menu_index = 0xFFFF;
-		sFlashStatus.last_boot_save_index = 0xFF;
-		sFlashStatus.last_boot_save_type = SRAM_NONE;
-	} else {
-		cursor_pos = sFlashStatus.last_boot_menu_index % 8;
-		page_active = sFlashStatus.last_boot_menu_index / 8;
-	}
-
 	// Count number of ROMs
 	for (roms_total = 0; roms_total < 512; roms_total++) {
 		memcpy(&sItemConfig, ((u8*)itemlist+itemlist_offset)+(0x70*roms_total), sizeof(sItemConfig));
@@ -154,6 +142,19 @@ int main(void) {
 	}
 	page_total = (roms_total + 8.0 - 1) / 8.0;
 
+	memcpy(&sFlashStatus, (void *)(AGB_ROM + flash_status_sector_offset * flash_sector_size), sizeof(sFlashStatus));
+	if ((sFlashStatus.magic != MAGIC_FLASH_STATUS) || (sFlashStatus.last_boot_menu_index >= roms_total)) {
+		sFlashStatus.magic = MAGIC_FLASH_STATUS;
+		sFlashStatus.version = 0;
+		sFlashStatus.battery_present = 1;
+		sFlashStatus.last_boot_menu_index = 0xFFFF;
+		sFlashStatus.last_boot_save_index = 0xFF;
+		sFlashStatus.last_boot_save_type = SRAM_NONE;
+	} else {
+		cursor_pos = sFlashStatus.last_boot_menu_index % 8;
+		page_active = sFlashStatus.last_boot_menu_index / 8;
+	}
+
 	s32 wait = 0;
 	u8 f = 0;
 	while (1) {
@@ -188,7 +189,7 @@ int main(void) {
 			}
 			
 			memcpy(&sItemConfig, ((u8*)itemlist+itemlist_offset)+0x70*(page_active*8+cursor_pos), sizeof(sItemConfig));
-			
+
 			// Draw cursor
 			LoadFont(1);
 			ClearList((void*)AGB_VRAM+0xA000, SCREEN_HEIGHT - sFontSpecs.max_height - 1, sFontSpecs.max_height);
@@ -198,7 +199,7 @@ int main(void) {
 			// Draw status bar
 			LoadFont(2);
 			memset(temp_unicode, 0, sizeof(temp_unicode));
-			snprintf(temp_ascii, 10+1, "%d/%d", page_active*8+cursor_pos+1, roms_total);
+			snprintf(temp_ascii, 10+1, "%d/%d", page_active+1, page_total);
 			AsciiToUnicode(temp_ascii, temp_unicode);
 			DrawText(11, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_RIGHT, temp_unicode, 10, font, (void*)AGB_VRAM+0xA000, FALSE);
 			if (boot_failed) {
@@ -221,7 +222,7 @@ int main(void) {
 				u8 a = ((sItemConfig.rom_offset / 0x40) & 0xF) << 4;
 				u8 b = 0x40 + (sItemConfig.rom_offset % 0x40);
 				u8 c = 0x40 - sItemConfig.rom_size;
-				snprintf(temp_ascii, 64, "%02X:%02X:%02X|0x%X~%dMiB|%X", a, b, c, (int)(sItemConfig.rom_offset * 512 * 1024), (int)(sItemConfig.rom_size * 512 >> 10), (int)(flash_save_sector_offset + sItemConfig.save_index));
+				snprintf(temp_ascii, 64, "%02X:%02X:%02X|0x%X~%dMiB|%X - %X", a, b, c, (unsigned int)(sItemConfig.rom_offset * 512 * 1024), (int)(sItemConfig.rom_size * 512 >> 10), (unsigned int)(flash_save_sector_offset + sItemConfig.save_index), (unsigned int)flash_buffer_size);
 				memset(temp_unicode, 0, sizeof(temp_unicode));
 				AsciiToUnicode(temp_ascii, temp_unicode);
 				DrawText(6, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_LEFT, temp_unicode, 64, font, (void*)AGB_VRAM+0xA000, FALSE);