Rekai Musuka
e32d6534c6
some basic ROMs already boot (ARM946E-S only), working on Armwrestler and Rockwrestler next so I can ensure CPU compatability for but ARMv5TE and ARMv4T
90 lines
2.2 KiB
Zig
90 lines
2.2 KiB
Zig
const std = @import("std");
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/// For use with withe tiniest ROM
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pub const Header = extern struct {
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title: [12]u8,
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game_code: [4]u8,
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maker_code: [2]u8,
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unit_code: u8,
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encryption_seed_select: u8,
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device_capacity: u8,
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_: [7]u8 = [_]u8{0} ** 7,
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__: u8 = 0,
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nds_region: u8,
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version: u8,
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auto_start: u8,
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arm9_rom_offset: u32,
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arm9_entry_address: u32,
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arm9_ram_address: u32,
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arm9_size: u32,
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arm7_rom_offset: u32,
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arm7_entry_address: u32,
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arm7_ram_address: u32,
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arm7_size: u32,
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/// File Name Table Offset
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fnt_offset: u32,
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/// File Name Table Size
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fnt_size: u32,
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/// File Allocation Table Offset
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fat_offset: u32,
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// File Allocation Table Size
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fat_size: u32,
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/// File ARM9 Overlay Offset
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farm9_overlay_offset: u32,
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// File ARM9 Overlay Size
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farm9_overlay_size: u32,
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/// File ARM9 Overlay Offset
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farm7_overlay_offset: u32,
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// File ARM9 Overlay Size
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farm7_overlay_size: u32,
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/// Port 40001A4h setting for normal commands (usually 00586000h)
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gamecard_control_setting_normal: u32, // TODO: rename these fields
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/// Port 40001A4h setting for KEY1 commands (usually 001808F8h)
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gamecard_control_setting_key1: u32,
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/// Icon / Title Offset
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icon_title_offset: u32,
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/// Secure Area Checksum
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secure_checksum: u16,
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/// Secure Area Delay
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secure_delay: u16,
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// TODO: Document
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arm9_auto_load_list: u32,
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arm7_auto_load_list: u32,
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secure_disable: u64 align(1),
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total_used: u32,
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header_size: u32,
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___: u32 = 0, // TODO: may not be zero?
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____: u64 align(1) = 0,
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rom_nand_end: u16,
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rw_nand_start: u16,
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_____: [0x18]u8 = [_]u8{0} ** 0x18,
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______: [0x10]u8 = [_]u8{0} ** 0x10,
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logo: [0x9C]u8,
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logo_checksum: u16,
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/// Header Checksum
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checksum: u16,
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// note, we're missing some debug_ prefixed fields here
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// but we want the header struct to be 0x160 bytes so that
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// the smallest NDS rom's header can be read without any speicifc
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// workarounds
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// TODO: Determine if we ever will need those debug fields, and if so: Implement them
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comptime {
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std.debug.assert(@sizeOf(@This()) == 0x160);
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}
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};
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