watch.cc.svn-base

德国Erlangen大学教学操作系统源码。

#include "device/watch.h"
#include "device/cgastr.h"
extern CGA_Stream kout;

Watch::Watch()
	: PIT(PIT::PIT_Attrib::max_interval)
{
}

Watch::Watch(int us) : PIT(us)
{
}

Watch::Watch(Watch &timer)
{
}

Watch::~Watch()
{
}

void Watch::windup()
{
	plugbox.assign(Plugbox::device_number::timer, *this);
	pic.allow(PIC::int_device::timer);
}

bool Watch::prologue()
{
	return true;
}

void Watch::epilogue()
{
	static bool i;
	
	*(((char*)0xb8000)+80) = i?'-':'|';
	*(((char*)0xb8000)+81) = 4;
	i = !i;
	
	bellringer.check();
	scheduler.Scheduler::resume();
}