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diff --git a/16/w_modex/FIXED32.HPP b/16/w_modex/FIXED32.HPP
new file mode 100644
index 00000000..49a084fe
--- /dev/null
+++ b/16/w_modex/FIXED32.HPP
@@ -0,0 +1,41 @@
+#ifndef FIXEDPOINT_HPP
+    #define FIXEDPOINT_HPP
+
+typedef long Fixed32;          // 16.16 FixedPoint
+typedef unsigned char Iangle;  // Integer angle (0..255)
+
+/* Macros for Type Conversion */
+#define INT_TO_FIXED(x) ((x) << 16)
+#define FIXED_TO_INT(x) ((x) >> 16)
+#define ROUND_FIXED_TO_INT(x) (((x) + 0x8000) >> 16)
+
+// Loads Fixed32 datafiles
+void initFixed32(void);
+
+// Common math functions
+Fixed32 FixedMul(Fixed32 num1, Fixed32 num2);
+Fixed32 FixedDiv(Fixed32 numer, Fixed32 denom);
+void CosSin(Iangle theta, Fixed32 *Cos, Fixed32 *Sin);
+
+Fixed32 FixedMulASM(Fixed32 num1, Fixed32 num2);
+#pragma aux FixedMulASM =   \
+    "imul edx"              \
+    "add eax, 8000h"        \
+    "adc edx, 0"            \
+    "shrd eax, edx, 16"     \
+    parm caller [eax] [edx] \
+    value [eax]             \
+    modify [eax edx];
+
+Fixed32 FixedDivASM(Fixed32 numer, Fixed32 denom);  // No rounding!
+#pragma aux FixedDivASM =   \
+    "xor eax, eax"          \
+    "shrd eax, edx, 16"     \
+    "sar edx, 16"           \
+    "idiv ebx"              \
+    parm caller [edx] [ebx] \
+    value [eax]             \
+    modify [eax ebx edx];
+
+#endif
+