Match n64dd text in code (#2058)

* match n64dd text

* format

* fixups

* add n64dd segment using baserom

* cleanup syms 1

* cleanup symbols 2

* cleanup D_800FF4B0

* fix declaration usage and linking for D_800FF4B0

src/code/code_n64dd_800AD410.c

@@ -1 +1,32 @@
+#include "ultra64.h"
+#include "z64dma.h"
+#include "segment_symbols.h"
+#include "n64dd.h"
 
+DECLARE_SEGMENT(n64dd)
+DECLARE_ROM_SEGMENT(n64dd)
+DECLARE_BSS_SEGMENT(n64dd)
+
+s8 func_801C7740_unknown(void);
+
+u8 B_80121AE0;
+s8 B_80121AE1;
+u8 B_80121AE2;
+
+void func_800ADA80(void) {
+    if (!B_80121AE0) {
+        DmaMgr_RequestSync(_n64ddSegmentStart, (uintptr_t)_n64ddSegmentRomStart,
+                           _n64ddSegmentRomEnd - _n64ddSegmentRomStart);
+        // TODO use _n64ddSegmentBssStart, _n64ddSegmentBssEnd
+        bzero(&D_801DA410, &D_801E8090 - &D_801DA410);
+        B_80121AE0 = true;
+        B_80121AE1 = func_801C7740_unknown();
+        if (B_80121AE1) {}
+    }
+}
+
+void func_800ADAF8(void) {
+    if (B_80121AE0 && (B_80121AE2 == 0)) {
+        B_80121AE0 = false;
+    }
+}

src/code/code_n64dd_800AD4C0.c

@@ -1,3 +1,90 @@
+#include "global.h"
 #include "n64dd.h"
 
+// TODO functions of unknown prototype
+extern char func_801C8510_unknown[];
+extern char func_800AE170_unknown[];
+extern char func_800ADCD8_unknown[];
+extern char osGetIntMask[];
+extern char osSetTime[];
+
+n64ddStruct_800FF4B0_pointers D_800FF4B0 = {
+    func_801C8510_unknown,
+    NULL,
+    NULL,
+    Fault_RemoveClient,
+    Fault_AddClient,
+    func_800AE170_unknown,
+    func_800ADCD8_unknown,
+    Fault_AddHungupAndCrashImpl,
+    Fault_AddHungupAndCrash,
+    func_800ADC08,
+    _Printf,
+    osCreateThread,
+    osDestroyThread,
+    osYieldThread,
+    osStartThread,
+    osStopThread,
+    osGetThreadId,
+    osSetThreadPri,
+    osGetThreadPri,
+    osCreateMesgQueue,
+    osSendMesg,
+    osJamMesg,
+    osRecvMesg,
+    osSetEventMesg,
+    osGetIntMask,
+    osSetIntMask,
+    osInvalDCache,
+    osInvalICache,
+    osWritebackDCache,
+    osWritebackDCacheAll,
+    osGetTime,
+    osSetTime,
+    osSetTimer,
+    osStopTimer,
+    &gSaveContext,
+    DmaMgr_RequestAsync,
+    DmaMgr_RequestSync,
+    DmaMgr_DmaFromDriveRom,
+    Cutscene_HandleEntranceTriggers,
+    gSegments,
+    Flags_GetEventChkInf,
+    Flags_SetEventChkInf,
+    NULL, // TODO possibly file padding
+    NULL,
+};
+
 n64ddStruct_80121AF0* B_80121AF0;
+
+n64ddStruct_80121AF0* func_800ADB30(n64ddStruct_80121AF0* arg0) {
+    n64ddStruct_800FF4B0_pointers* temp_a0 = func_800ADBD0();
+
+    if (arg0 != NULL && arg0->unk_00 != NULL) {
+        arg0->unk_00(temp_a0, arg0);
+    }
+    B_80121AF0 = arg0;
+    return B_80121AF0;
+}
+
+void func_800ADB8C(void) {
+    if (B_80121AF0 != NULL) {
+        if (B_80121AF0->unk_04 != NULL) {
+            B_80121AF0->unk_04();
+        }
+    }
+    B_80121AF0 = NULL;
+}
+
+n64ddStruct_800FF4B0_pointers* func_800ADBD0(void) {
+    D_800FF4B0.unk_04 = 0;
+    D_800FF4B0.unk_08 = gRegEditor;
+    D_800FF4B0.unk_88 = &gSaveContext;
+    return &D_800FF4B0;
+}
+
+void func_800ADC00(void) {
+}
+
+void func_800ADC08(s32 arg0, s32 arg1, s32 arg2) {
+}