struct st_pa {
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PIN;
	unsigned char DDR;
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PORT;
};
struct st_pb {
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PIN;
	unsigned char DDR;
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PORT;
};
struct st_pc {
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PIN;
	unsigned char DDR;
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PORT;
};
struct st_pd {
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PIN;
	unsigned char DDR;
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char B3:1;
			unsigned char B4:1;
			unsigned char B5:1;
			unsigned char B6:1;
			unsigned char B7:1;
		} BIT;
	} PORT;
};
struct st_pe {
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char   :5;
		} BIT;
	} PIN;
	unsigned char DDR;
	union {
		unsigned char BYTE;
		struct {
			unsigned char B0:1;
			unsigned char B1:1;
			unsigned char B2:1;
			unsigned char   :5;
		} BIT;
	} PORT;
};

#define PA      (*(volatile struct st_pa    *)0x39) // PA    Address
#define PB      (*(volatile struct st_pb    *)0x36) // PB    Address
#define PC      (*(volatile struct st_pc    *)0x33) // PC    Address
#define PD      (*(volatile struct st_pd    *)0x30) // PD    Address
#define PE      (*(volatile struct st_pe    *)0x25) // PE    Address