diff --git a/cores/arduino/WRandom.cpp b/cores/arduino/WMath.cpp
similarity index 90%
rename from cores/arduino/WRandom.cpp
rename to cores/arduino/WMath.cpp
index c45c306..c83e2a2 100644
--- a/cores/arduino/WRandom.cpp
+++ b/cores/arduino/WMath.cpp
@@ -52,3 +52,7 @@ long random(long howsmall, long howbig)
   return random(diff) + howsmall;
 }
 
+long map(long x, long in_min, long in_max, long out_min, long out_max)
+{
+  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
\ No newline at end of file
diff --git a/cores/arduino/WProgram.h b/cores/arduino/WProgram.h
index d6d5ccc..206cdac 100755
--- a/cores/arduino/WProgram.h
+++ b/cores/arduino/WProgram.h
@@ -10,8 +10,9 @@
 #ifdef __cplusplus
 #include "HardwareSerial.h"
 
-// random prototypes
+// WMath prototypes
 long random(long);
 long random(long, long);
 void randomSeed(unsigned int);
+long map(long, long, long, long, long);
 #endif
diff --git a/cores/arduino/wiring.h b/cores/arduino/wiring.h
index 3c77389..e0c5315 100755
--- a/cores/arduino/wiring.h
+++ b/cores/arduino/wiring.h
@@ -44,6 +44,8 @@ extern "C"{
 #define PI 3.14159265
 #define HALF_PI 1.57079
 #define TWO_PI 6.283185
+#define DEG_TO_RAD 0.01745329
+#define RAD_TO_DEG 57.2957786
 
 #define SERIAL  0x0
 #define DISPLAY 0x1
@@ -55,14 +57,30 @@ extern "C"{
 #define FALLING 2
 #define RISING 3
 
+// undefine stdlib's abs if encountered
+#ifdef abs
+#undef abs
+#endif
+
+#define int(x)     ((int)(x))
+#define char(x)    ((char)(x))
+#define long(x)    ((long)(x))
+#define byte(x)    ((uint8_t)(x))
+#define float(x)   ((float)(x))
+#define boolean(x) ((uint8_t)((x)==0?0:1))
+
 #define min(a,b) ((a)<(b)?(a):(b))
 #define max(a,b) ((a)>(b)?(a):(b))
 #define abs(x) ((x)>0?(x):-(x))
 #define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+#define round(x)     ((x)>=0?(long)((x)+0.5):(long)((x)-0.5))
 #define radians(deg) ((deg)*DEG_TO_RAD)
 #define degrees(rad) ((rad)*RAD_TO_DEG)
 #define sq(x) ((x)*(x))
 
+#define interrupts() sei()
+#define noInterrupts() cli()
+
 #define clockCyclesPerMicrosecond() ( F_CPU / 1000000L )
 #define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )