WIP new title screen code

All it does right now is play the title screen sound for 5 seconds

build.ps1

@@ -18,7 +18,8 @@ $input_c_files =
     "src/c/fileselect.c",
     "src/c/status.c",
     "src/c/battle.c",
-    "src/c/psi.c"
+    "src/c/psi.c",
+    "src/c/title.c"
 
 $base_c_address    = 0x83755B8;
 $scripttool_cmd    = "bin/ScriptTool/ScriptTool.dll"

src/c/ext.c

@@ -20,3 +20,5 @@ int __attribute__((naked)) m2_clearwindowtiles(WINDOW* window) {}
 int __attribute__((naked)) customcodes_parse_generic(int code, char* parserAddress, WINDOW* window, int* dest) {}
 void __attribute__((naked)) m2_printstr(WINDOW* window, byte* str, unsigned short x, unsigned short y, bool highlight) {}
 void __attribute__((naked)) m2_setupbattlename(short value) {}
+void __attribute__((naked)) m2_title_teardown() {}
+void __attribute__((naked)) vblank() {}

src/c/locs.c

@@ -27,3 +27,4 @@ int            *m2_items_offsets           = (int*)                  0x8B1AF94;
 byte           *m2_items_strings           = (byte*)                 0x8B1A694;
 unsigned short *name_header_tiles          = (unsigned short*)       0x8B1B8B0;
 PSIPrintInfo   *psi_print_info             = (PSIPrintInfo*)         0x8B2A9C0;
+int            *title_counter              = (int*)                  0x2011B60;

src/c/locs.h

@@ -34,5 +34,6 @@ extern byte *m2_items_strings;
 extern unsigned short *name_header_tiles;
 extern byte *character_general_data;
 extern PSIPrintInfo *psi_print_info;
+extern int *title_counter;
 
 #endif

src/c/title.c

@@ -0,0 +1,32 @@
+#include "title.h"
+#include "locs.h"
+
+int title_frame_first()
+{
+    if (*title_counter == 0)
+    {
+        m2_soundeffect(0xAF);
+    }
+
+    (*title_counter)++;
+
+    if (*title_counter == 5 * 60)
+    {
+        m2_title_teardown();
+        return -1;
+    }
+
+    return 0;
+}
+
+int title_frame_second()
+{
+    vblank();
+
+    if (*title_counter == 5 * 60)
+    {
+        m2_title_teardown();
+    }
+
+    return 0;
+}

src/c/title.h

@@ -0,0 +1,10 @@
+#ifndef HEADER_TITLE_INCLUDED
+#define HEADER_TITLE_INCLUDED
+
+int title_frame_first();
+int title_frame_second();
+extern void m2_title_teardown();
+extern void m2_soundeffect(int index);
+extern void vblank();
+
+#endif

src/m2-hack.asm

@@ -1542,6 +1542,10 @@ nop
     dw 0x2011940
     dw 0x2011960
 
+    // Expand the null area after the fifth palette buffer (gives us 0x2A0 bytes of nullspace
+    // starting at 0x2011B60)
+    .org 0x8011490 :: dw 0x85000128
+
     // Define the proper expected uncompressed sizes
     .org 0x801141E :: mov r5,4 :: neg r5,r5
     .org 0x8011422 :: ldr r2,[r0,r5]
@@ -1549,6 +1553,11 @@ nop
     .org 0x8011436 :: ldr r2,[r0,r5]
     .org 0x8011440 :: ldr r2,[r0,r5]
 
+    // Replace per-frame functions
+    .org 0x82D6B7C
+    dw title_frame_first + 1
+    dw title_frame_second + 1
+
 // --- Animation 5 (quick title screen) ---
 .org 0x82D6BD4 :: dh 0x008A   // Enable 8-bit BG0
 .org 0x82D6BE0 :: dh 0x1100   // Disable BG1
@@ -1749,11 +1758,13 @@ dw 0x20 :: .incbin "data/m2-title-text-pal-static.c.bin"
 .definelabel m2_sub_d6844           ,0x80D6844
 .definelabel m2_setupbattlename     ,0x80DCD00
 .definelabel m2_stat_symb_checker   ,0x8B0EDA4
+.definelabel vblank                 ,0x80F47E4
 .definelabel m2_div                 ,0x80F49D8
 .definelabel m2_remainder           ,0x80F4A70
 .definelabel m2_items               ,0x8B1D62C
 .definelabel m2_default_names       ,0x82B9330
 .definelabel m2_psi_print_table     ,0x8B2A9C0
+.definelabel m2_title_teardown      ,0x8000C28
 
 //==============================================================================
 // Code files