#include <stdlib.h>

#include "v25.h"
#include "v25bd.h"
#include "gen.h"

void
spk_delay(int length)
{
	int i;

	for (i = 0; i < length; i++)
		;
}

void
main()
{
	int howlong = 100;
	int volume = 0xFF;
	unsigned char oldkey = 0;

	printf("\n1: HIGH, 2: LOW, 4:BIG, 8:SMALL, ELSE:QUIT");
	while (1) {
		outportb(SPEAKER, 0);
		spk_delay(howlong);
		outportb(SPEAKER, volume);
		spk_delay(howlong);

		if (oldkey == inportb(KEYBOARD))
			continue;
		oldkey = inportb(KEYBOARD);
		switch (oldkey) {
			case 0x01 :
				howlong += 10;
				if (howlong > 1000)
					howlong = 1000;
				break;
			case 0x02 :
				howlong -= 10;
				if (howlong < 0)
					howlong = 0;
				break;
			case 0x04 :
				volume += 10;
				if (volume > 255)
					volume = 255;
				break;
			case 0x08 :
				volume -= 10;
				if (volume < 0)
					volume = 0;
				break;
			case 0x00:
				continue;
			default :
				exit(0);
		}
	}
}