__sbit __at (0xB9) PT0L;//Timer 0 Interrupt Priority Low Bit.
__sbit __at (0xB8) PX0L;//External Interrupt 0 Priority Low Bit.
-__sfr __at (0xB7) IP0H; //Interrupt Priority 0 HIGH
+__sfr __at (0xB7) IPH0; //Interrupt Priority 0 HIGH
#define PPCH 0x40 //PCA Interrupt Priority High Bit.
#define PT2H 0x20 //Timer 2 Interrupt Priority High Bit.
#define PHS 0x10 //Serial Port Interrupt Priority High Bit.