well, GX FIFO base. noting that for now, it doesn't do much beyond getting full real quick.

also make ROM loading fail gracefully if it shits itself, instead of entering an endless loop.

NDSCart.cpp

@@ -601,12 +601,17 @@ void Reset()
 }
 
 
-void LoadROM(char* path)
+bool LoadROM(char* path)
 {
     // TODO: streaming mode? for really big ROMs or systems with limited RAM
     // for now we're lazy
 
     FILE* f = fopen(path, "rb");
+    if (!f)
+    {
+        printf("Failed to open ROM file %s\n", path);
+        return false;
+    }
 
     fseek(f, 0, SEEK_END);
     u32 len = (u32)ftell(f);
@@ -674,6 +679,8 @@ void LoadROM(char* path)
     strncpy(savepath + strlen(path) - 3, "sav", 3);
     printf("Save file: %s\n", savepath);
     NDSCart_SRAM::LoadSave(savepath);
+
+    return true;
 }
 
 void ReadROM(u32 addr, u32 len, u32 offset)