diff --git a/configure.py b/configure.py
index 461992c1..efdeb6e3 100755
--- a/configure.py
+++ b/configure.py
@@ -1127,7 +1127,7 @@ else:
 n.newline()
 n.variable("host_cflags", "-I include/ -Wno-trigraphs")
 n.variable("host_cppflags",
-           "-std=c++98 -I include/ -fno-exceptions -fno-rtti -Wno-trigraphs")
+           "-std=c++98 -I include/ -fno-exceptions -fno-rtti -D_CRT_SECURE_NO_WARNINGS -Wno-trigraphs")
 
 ###
 # Rules
diff --git a/include/Kyoto/Alloc/CSmallAllocPool.hpp b/include/Kyoto/Alloc/CSmallAllocPool.hpp
index 1a4366db..bd497093 100644
--- a/include/Kyoto/Alloc/CSmallAllocPool.hpp
+++ b/include/Kyoto/Alloc/CSmallAllocPool.hpp
@@ -18,7 +18,7 @@ public:
   }
 
   uint GetIndexFromPtr(const void* ptr) const {
-    return ((const uchar*)ptr - x0_mainData) / kPointerSize;
+    return ((const uchar*)ptr - (const uchar*)x0_mainData) / kPointerSize;
   }
   long GetEntryValue(uint idx) const { return (long)*((uchar*)x4_bookKeeping + idx); }
   uchar* GetPtrFromIndex(unsigned int idx) const {
diff --git a/include/Kyoto/Particles/IElement.hpp b/include/Kyoto/Particles/IElement.hpp
index cd1b909f..17665319 100644
--- a/include/Kyoto/Particles/IElement.hpp
+++ b/include/Kyoto/Particles/IElement.hpp
@@ -14,8 +14,8 @@ public:
   virtual ~IElement(){};
 
   // -> CFrameDelayedKiller
-  void* operator new(unsigned long sz, const char*, const char*);
-  void* operator new(unsigned long sz) { return operator new(sz, "??(??)", nullptr); }
+  void* operator new(size_t sz, const char*, const char*);
+  void* operator new(size_t sz) { return operator new(sz, "??(??)", nullptr); }
   void operator delete(void* ptr, size_t sz);
 };
 
diff --git a/include/Kyoto/TOneStatic.hpp b/include/Kyoto/TOneStatic.hpp
index 4d1d1b4d..f7e35127 100644
--- a/include/Kyoto/TOneStatic.hpp
+++ b/include/Kyoto/TOneStatic.hpp
@@ -6,11 +6,11 @@
 template < typename T >
 class TOneStatic {
 public:
-  void* operator new(unsigned long sz, const char*, const char*); /* {
+  void* operator new(size_t sz, const char*, const char*); /* {
    ReferenceCount()++;
    return GetAllocSpace();
  }*/
-  void* operator new(unsigned long sz) { return operator new(sz, "??(??)", nullptr); }
+  void* operator new(size_t sz) { return operator new(sz, "??(??)", nullptr); }
   void operator delete(void* ptr);
 
 private:
diff --git a/include/dolphin/os/OSCache.h b/include/dolphin/os/OSCache.h
index 29f99f39..97035925 100644
--- a/include/dolphin/os/OSCache.h
+++ b/include/dolphin/os/OSCache.h
@@ -1,7 +1,7 @@
 #ifndef _DOLPHIN_OSCACHE
 #define _DOLPHIN_OSCACHE
 
-#include "types.h"
+#include "dolphin/types.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/dolphin/vi.h b/include/dolphin/vi.h
index b3170dc9..fdedc8c5 100644
--- a/include/dolphin/vi.h
+++ b/include/dolphin/vi.h
@@ -22,7 +22,11 @@ void VISetWindowFullscreen(bool fullscreen);
 bool VIGetWindowFullscreen();
 #endif
 
+#ifdef __MWERKS__
 vu16 __VIRegs[59] : 0xCC002000;
+#else
+vu16 __VIRegs[59];
+#endif
 
 #ifdef __cplusplus
 }
diff --git a/src/Kyoto/Basics/RAssertDolphin.cpp b/src/Kyoto/Basics/RAssertDolphin.cpp
index 253d0d9d..8d7db8d9 100644
--- a/src/Kyoto/Basics/RAssertDolphin.cpp
+++ b/src/Kyoto/Basics/RAssertDolphin.cpp
@@ -5,7 +5,9 @@
 #include "dolphin/os/OSMemory.h"
 #include "dolphin/pad.h"
 #include "dolphin/vi.h"
+
 #include <stdio.h>
+#include <stdarg.h>
 
 static const char* buildTime = "Build v1.088 10/29/2002 2:21:25";
 static char rs_debugger_buffer[1024];
@@ -42,7 +44,7 @@ void ErrorHandler(OSError code, OSContext* context, int arg1, int arg2) {
         local_60 = 0x2010408;
         if ((pads[1].button & 0xc10) == 0xc10) {
           if ((pads[1].button & 0xf) != 0) {
-            if (pads[1].button & loopExitCriteria == 0) { // TODO: wrong logic with loopExitCriteria
+            if ((pads[1].button & loopExitCriteria) == 0) { // TODO: wrong logic with loopExitCriteria
               if ((loopExitCriteria != 0) &&
                   pads[1].button == 0) { // TODO: wrong logic with pads[1].button
                 loopExitCriteria = 0;
diff --git a/src/Kyoto/Graphics/CCubeMaterial.cpp b/src/Kyoto/Graphics/CCubeMaterial.cpp
index c4ffa0e7..55196dd9 100644
--- a/src/Kyoto/Graphics/CCubeMaterial.cpp
+++ b/src/Kyoto/Graphics/CCubeMaterial.cpp
@@ -6,6 +6,11 @@
 
 #include <dolphin/mtx.h>
 
+#ifndef __MWERKS__
+void __memcpy(void*, const void*, int);
+#endif
+
+
 inline void CGX::SetAlphaCompare(GXCompare comp0, uchar ref0, GXAlphaOp op, GXCompare comp1,
                                  uchar ref1) {
   uint flags = MaskAndShiftLeft(comp0, 7, 0) | MaskAndShiftLeft(ref0, 0xFF, 3) |