This routine takes an 8 byte parameter block addressed by the X and Y registers. The 8 bytes of the parameter block may be considered as the four parameters used for the SOUND command in BASIC.

Parameter block

XY+	Length	Content
0	2	Channel
2	2	Amplitude
4	2	Pitch
6	2	Duration

For example, to perform a

SOUND 1,-15,200,20

then the contents of the table would be:

Parameter block

XY+	Content	Sound Param	Value
0	Channel	1	0x01
1			0x00
2	Amplitude	-15	0xF1
3			0xFF
4	Pitch	200	0xC8
5			0x00
6	Duration	20	0x14
7			0x00