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+/*
+    Copyright 2016-2023 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef MELONDS_ARGS_H
+#define MELONDS_ARGS_H
+
+#include <array>
+#include <optional>
+#include <memory>
+
+#include "types.h"
+#include "MemConstants.h"
+#include "DSi_NAND.h"
+#include "FATStorage.h"
+#include "FreeBIOS.h"
+#include "SPI_Firmware.h"
+
+namespace melonDS
+{
+namespace NDSCart { class CartCommon; }
+namespace GBACart { class CartCommon; }
+
+template<size_t N>
+constexpr std::array<u8, N> BrokenBIOS = []() constexpr {
+    std::array<u8, N> broken {};
+
+    for (int i = 0; i < 16; i++)
+    {
+        broken[i*4+0] = 0xE7;
+        broken[i*4+1] = 0xFF;
+        broken[i*4+2] = 0xDE;
+        broken[i*4+3] = 0xFF;
+    }
+
+    return broken;
+}();
+
+/// Arguments to pass into the NDS constructor.
+/// New fields here should have default values if possible.
+struct NDSArgs
+{
+    /// NDS ROM to install.
+    /// Defaults to nullptr, which means no cart.
+    /// Should be populated with the desired save data beforehand,
+    /// including an SD card if applicable.
+    std::unique_ptr<NDSCart::CartCommon> NDSROM = nullptr;
+
+    /// GBA ROM to install.
+    /// Defaults to nullptr, which means no cart.
+    /// Should be populated with the desired save data beforehand.
+    /// Ignored in DSi mode.
+    std::unique_ptr<GBACart::CartCommon> GBAROM = nullptr;
+
+    /// NDS ARM9 BIOS to install.
+    /// Defaults to FreeBIOS, which is not compatible with DSi mode.
+    std::array<u8, ARM9BIOSSize> ARM9BIOS = bios_arm9_bin;
+
+    /// NDS ARM7 BIOS to install.
+    /// Defaults to FreeBIOS, which is not compatible with DSi mode.
+    std::array<u8, ARM7BIOSSize> ARM7BIOS = bios_arm7_bin;
+
+    /// Firmware image to install.
+    /// Defaults to generated NDS firmware.
+    /// Generated firmware is not compatible with DSi mode.
+    melonDS::Firmware Firmware {0};
+};
+
+/// Arguments to pass into the DSi constructor.
+/// New fields here should have default values if possible.
+/// Contains no virtual methods, so there's no vtable.
+struct DSiArgs final : public NDSArgs
+{
+    std::array<u8, DSiBIOSSize> ARM9iBIOS = BrokenBIOS<DSiBIOSSize>;
+    std::array<u8, DSiBIOSSize> ARM7iBIOS = BrokenBIOS<DSiBIOSSize>;
+
+    /// NAND image to install.
+    /// Required, there is no default value.
+    DSi_NAND::NANDImage NANDImage;
+
+    /// SD card to install.
+    /// Defaults to std::nullopt, which means no SD card.
+    std::optional<FATStorage> DSiSDCard;
+};
+}
+#endif //MELONDS_ARGS_H