6 uint8_t port_byte_in(uint16_t port);
7 void port_byte_out(uint16_t port,uint8_t data);
8 uint16_t port_word_in(uint16_t port);
9 void port_word_out(uint16_t port,uint16_t data);
10 uint32_t port_long_in(uint16_t port);
11 void port_long_out(uint16_t port,uint32_t data);