1 files changed, 55 insertions, 0 deletions
diff --git a/src/debug/crash.c b/src/debug/crash.c
new file mode 100644
index 000000000..85058d285
--- /dev/null
+++ b/src/debug/crash.c
@@ -0,0 +1,55 @@
+#include "global.h"
+#include "main.h"
+#include "task.h"
+#include "text.h"
+#include "palette.h"
+
+extern struct Window gUnknown_03004210;
+
+static void CB2_CrashIdle(void);
+
+// unused exception handler. Takes a string input describing the exception
+// and halts on a black screen. Used in German Debug Ruby.
+void Crash(u8 *text)
+{
+    u16 savedIme;
+
+    REG_BG0HOFS = 0;
+    REG_BG0VOFS = 0;
+    REG_BG1HOFS = 0;
+    REG_BG1VOFS = 0;
+    REG_BG2HOFS = 0;
+    REG_BG2VOFS = 0;
+    REG_BG3HOFS = 0;
+    REG_BG3VOFS = 0;
+    REG_WIN0H = 0;
+    REG_WIN0V = 0;
+    REG_WIN1H = 0;
+    REG_WIN1V = 0;
+    REG_DISPCNT = DISPCNT_MODE_0 | DISPCNT_OBJ_1D_MAP | DISPCNT_BG_ALL_ON | DISPCNT_OBJ_ON;
+    savedIme = REG_IME;
+    REG_IME = 0;
+    REG_IE |= INTR_FLAG_VBLANK;
+    REG_IME = savedIme;
+    REG_DISPSTAT = 8;
+    ResetTasks();
+    ResetSpriteData();
+    SetMainCallback2(CB2_CrashIdle);
+    DmaFill32Large(3, 0, (void *)VRAM, 0x18000, 0x1000);
+    Text_LoadWindowTemplate(&gWindowTemplate_81E6FD8);
+    Text_InitWindowWithTemplate(&gUnknown_03004210, &gWindowTemplate_81E6FD8);
+    LoadFontDefaultPalette(&gWindowTemplate_81E6FD8);
+    Text_InitWindowAndPrintText(&gUnknown_03004210, text, 1, 9, 7);
+}
+
+static void CB2_CrashIdle(void)
+{
+    REG_BG0HOFS = 0;
+    REG_BG0VOFS = 0;
+    REG_BG1HOFS = 0;
+    REG_BG1VOFS = 0;
+    REG_BG2HOFS = 0;
+    REG_BG2VOFS = 0;
+    REG_BG3HOFS = 0;
+    REG_BG3VOFS = 0;
+}