[ntsc-1.2] Import n64dd code from Decompollaborate/n64dd (#2136)

* Import n64dd code from Decompollaborate/n64dd

Co-authored-by: Anghelo Carvajal <angheloalf95@gmail.com>
Co-authored-by: Elliptic Ellipsis <elliptic.ellipsis@gmail.com>

* Don't stub out missing textures

* Remove @brief

* Add low-effort file comments

* Match OoT if style

* Fix n64dd matching due to int vs long

* Fix English n64dd error textures

* Compress n64dd segment

* Align n64dd to 0x40

---------

Co-authored-by: Anghelo Carvajal <angheloalf95@gmail.com>
Co-authored-by: Elliptic Ellipsis <elliptic.ellipsis@gmail.com>

4 files changed, 87 insertions, 0 deletions

diff --git a/include/functions.h b/include/functions.h
index 403cd89b2..ee7a203a6 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -1395,6 +1395,8 @@ void Audio_SetCutsceneFlag(s8 flag);
 void Audio_PlaySfxIfNotInCutscene(u16 sfxId);
 void func_800F6964(u16);
 void Audio_StopBgmAndFanfare(u16 fadeOutDuration);
+void func_800F6B3C(void);
+void func_800F6BDC(void);
 void Audio_PreNMI(void);
 void Audio_SetNatureAmbienceChannelIO(u8 channelIdxRange, u8 ioPort, u8 ioData);
 void Audio_PlayNatureAmbienceSequence(u8 natureAmbienceId);
diff --git a/include/n64dd.h b/include/n64dd.h
index 4f117f682..6931eac26 100644
--- a/include/n64dd.h
+++ b/include/n64dd.h
@@ -2,6 +2,7 @@
 #define N64DD_H
 
 #include "ultra64.h"
+#include "ultra64/leo.h"
 #include "z64pause.h"
 #include "z64scene.h"
 #include "z64map_mark.h"
@@ -59,6 +60,35 @@ typedef struct n64ddStruct_80121220 {
     s32 (*unk_78)(struct PlayState*, void*, void*);
 } n64ddStruct_80121220; // size = ?
 
+typedef struct struct_801E0D18 {
+    /* 0x00 */ LEOCmd unk_00;
+    /* 0x1C */ OSMesgQueue unk_1C;
+    /* 0x38 */ LEODiskID diskId;
+    /* 0x58 */ UNK_TYPE unk_58;
+    /* 0x5C */ UNK_TYPE unk_5C;
+    /* 0x60 */ u32 unk_60;
+    /* 0x64 */ u8 unk_64;
+    /* 0x65 */ u8 unk_65;
+    /* 0x66 */ u8 unk_66;
+    /* 0x68 */ s32 unk_68;
+    /* 0x6C */ s32 unk_6C;
+} struct_801E0D18; // size = 0x70
+
+typedef struct struct_801D9D50 {
+    /* 0x00 */ u8 unk_00; // command enum
+    /* 0x04 */ s32 unk_04;
+    /* 0x08 */ u8 unk_08;
+    /* 0x0C */ void (*unk_0C)(void*, void*, void*);
+    /* 0x10 */ s32 unk_10;
+    /* 0x14 */ void (*unk_14)(void*, uintptr_t, size_t);
+    /* 0x18 */ void* unk_18;
+    /* 0x1C */ void* unk_1C; // either OSMesgQueue* (command 0) or integer LBA (commands 2 and 3)
+    /* 0x20 */ void* unk_20; // either OSMesgQueue* (command 0) or integer byte size (commands 3 and 4)
+    /* 0x24 */ OSId unk_24;
+    /* 0x28 */ void* unk_28;
+    /* 0x2C */ OSPri unk_2C;
+} struct_801D9D50; // size = 0x30
+
 void func_800AD410(void);
 void func_800AD488(void);
 n64ddStruct_80121220* func_800AD4C0(n64ddStruct_80121220* arg0);
@@ -77,6 +107,35 @@ void func_801C7C1C(void* dest, s32 offset, s32 size);
 void func_801C7E78(void);
 void n64dd_SetDiskVersion(s32 arg0);
 
+s32 func_801C8000(struct_801D9D50* arg0);
+s32 func_801C81C4(void);
+void func_801C81EC(struct_801E0D18* arg0);
+void func_801C8298(struct_801E0D18* arg0);
+void func_801C82E0(struct_801E0D18* arg0);
+void func_801C832C(struct_801E0D18* arg0);
+void func_801C83A0(struct_801E0D18* arg0);
+void func_801C8414(struct_801E0D18* arg0);
+s32 func_801C873C(struct_801E0D18* arg0);
+
+void func_801C8AA8(void);
+s32 func_801C91E0(struct_801E0D18*);
+s32 func_801C9260(struct_801E0D18*);
+s32 func_801C9334(struct_801E0D18*);
+s32 func_801C93C4(struct_801E0D18*);
+
+void func_801C94F8(u8* arg0, u16 arg1);
+void func_801C9A10(u8* arg0, s32 arg1, u8* str);
+void func_801C9B50(s32 arg0, void (*arg1)(void*, uintptr_t, size_t));
+
+u8* func_801C9E28(s32 errorNum);
+u8* func_801C9EC0(void);
+u8* func_801C9F90(s32 errorNum);
+u8* func_801C9FFC(void);
+u8* func_801CA030(s32 errorNum);
+u8* func_801CA070(void);
+
+void func_801CA1F0(void* charTexBuf, s32 posX, s32 posY, s32 dx, s32 dy, s32 cy, void* frameBuf, s32 screenWidth);
+
 extern n64ddStruct_800FEE70_pointers D_800FEE70;
 extern n64ddStruct_80121220* B_80121220;
 
@@ -86,4 +145,25 @@ extern u8 D_80121212;
 extern vu8 D_80121213;
 extern vu8 D_80121214;
 
+extern s32 (*D_801D2E54)(struct_801E0D18*);
+
+extern u8 B_801DC000[];
+
+extern s32 D_801D2E90;
+extern OSMesgQueue* B_801E0D10[2];
+
+extern s32 D_801D2EA0;
+extern s32 D_801D2EA8;
+extern s32 B_801E0F60;
+extern s32 B_801E0F64;
+extern void (*D_801D2EB4)(void*, void*, void*);
+
+// Error messages
+extern const char* D_801D2ED0[];        // "Error Number    " array
+extern const char* D_801D2EE0[2][8][4]; // Array of error message strings
+
+// Error textures
+extern u64 gN64DDError41Texs[2][0x600 / sizeof(u64)];
+extern u64 gN64DDPleaseReadManualTexs[2][0x2800 / sizeof(u64)];
+
 #endif
diff --git a/include/variables.h b/include/variables.h
index bf4fb15c5..dc01f712d 100644
--- a/include/variables.h
+++ b/include/variables.h
@@ -203,6 +203,7 @@ extern PreNmiBuff* gAppNmiBufferPtr;
 extern uintptr_t gSegments[NUM_SEGMENTS];
 extern Scheduler gScheduler;
 extern PadMgr gPadMgr;
+extern IrqMgr gIrqMgr;
 extern volatile OSTime gAudioThreadUpdateTimeTotalPerGfxTask;
 extern volatile OSTime gGfxTaskSentToNextReadyMinusAudioThreadUpdateTime;
 extern volatile OSTime gRSPAudioTimeTotal;
diff --git a/include/z64.h b/include/z64.h
index 7a6187a48..377a760ce 100644
--- a/include/z64.h
+++ b/include/z64.h
@@ -76,6 +76,8 @@
 #define THREAD_PRI_DMAMGR_LOW   10  // Used when decompressing files
 #define THREAD_PRI_GRAPH        11
 #define THREAD_PRI_AUDIOMGR     12
+#define THREAD_PRI_N64DD        13
+#define THREAD_PRI_DDMSG        13
 #define THREAD_PRI_PADMGR       14
 #define THREAD_PRI_MAIN         15
 #define THREAD_PRI_SCHED        15
@@ -90,6 +92,8 @@
 #define THREAD_ID_GRAPH       4
 #define THREAD_ID_SCHED       5
 #define THREAD_ID_PADMGR      7
+#define THREAD_ID_N64DD       8
+#define THREAD_ID_DDMSG       9
 #define THREAD_ID_AUDIOMGR   10
 #define THREAD_ID_DMAMGR     18
 #define THREAD_ID_IRQMGR     19