Unitech MR350MKII manual 21H

regs.h.bh = 8; int86(0x21,®s,®s);

	}
54	Buzzer volume control with user-defined frequency and time INT
	21H
	Entry Parameters:	AH = 0x54
		CX = 1-3000 ;frequency in Hz
		DX = 1-1600 ;sound duration in mini-second
	Returned Values:	None

void TD_beep_user(int fz,int tm)

{

regs.h.ah 0x54;= regs.x.cx = fz; regs.x.dx = tm; int86(0x21,®s,®s);

}

Buzzer volume control with predefined frequency and time INT 35H

Entry Parameters:	AX = 0-8	;frequency assignment
	BX = 0-8	;time duration
Returned Values:	None
	Frequency		Time duration
AX = 0	200 Hz	BX = 0	10 ms
1	400	1	50
2	600	2	100
3	800	3	200
4	1K	4	500
5	2K	5	800
6	2.5K	6	1 second
7	3K	7	1.5 seconds
8	5K	8	2 seconds

void TD_beep(int fz,int tm)

{

regs.x.ax = fz; regs.x.bx = tm; int86(0x35,®s,®s);

}

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