Linux操作系统内核对RTC的编程详解（1）4

#define CMOS_READ(addr) ({ \ 



outb_p((addr),RTC_PORT(0)); \ 



inb_p(RTC_PORT(1)); \ 



}) 



#define CMOS_WRITE(val, addr) ({ \ 



outb_p((addr),RTC_PORT(0)); \ 



outb_p((val),RTC_PORT(1)); \ 



}) 



#define RTC_IRQ 8