+//FIXME this should be defined by the platform.
+#if (platform == donbfet)
+# define SETTST PORTA|=(1 << PA4);
+# define CLRTST PORTA&=~(1 << PA4);
+# define SETRST PORTA|=(1 << PA5);
+# define CLRRST PORTA&=~(1 << PA5);
+#else
+# define SETTST P4OUT|=TST
+# define CLRTST P4OUT&=~TST
+# define SETRST P2OUT|=RST
+# define CLRRST P2OUT&=~RST
+#endif