Specifications

Appendix B: Programming the Watchdog Timer

Page A7

flags = enablespace();

refreshtimer();

setconfigurationregister(SMOUTCTRL,

(unsigned char)(getconfigurationregister(SMOUTCTRL) &

(unsigned char)~1));

disablespace(flags);

_dos_setvect(TIMERINT,newfunction);

_enable();

}

void

deinstalltimer()

{

unsigned short flags;

flags = enablespace();

setconfigurationregister(SMOUTCTRL,

(unsigned char) (getconfigurationregister(SMOUTCTRL) | 1));

_dos_setvect(TIMERINT,previoustimerfunction);

disablespace(flags);

}

main(int argc, char **argv)

{

unsigned short flags;

installtimer(mytimer);

// Application code goes here ...

deinstalltimer();

}

For more details see the Intel 8254 specification and the Intel 386 SL Microprocessor

Superset Programmer's Reference Manual.