constant name	description
CDC_PTYPE_DFL	Specify the default value_CD playback: Indicates the beginning / end of the disc At seek: Home position Represents
CDC_PTYPE_FAD	Frame address specification
CDC_PTYPE_TNO	track / index specification
CDC_PTYPE_NOCHG	Unchanged specification (does not change setting value)

The beginning of the disk: FAD = 150 (96H) position (2 seconds 0 frames in absolute time)
Disc end: FAD = Readout start frame address (TOC information)-1 position

 (a) Specifying default values
CdcPos poswk, * pos = & poswk;
CDC_POS_PTYPE (pos) = CDC_PTYPE_DFL; 

(b) Frame address specification
CdcPos poswk, * pos = & poswk;
CDC_POS_PTYPE (pos) = CDC_PTYPE_FAD;
CDC_POS_FAD (pos) = fad; / * Frame address * /
In the case of the end position, specify the number of sectors from the start FAD (number of FAD sectors). 

(c) Track / index specification
CdcPos poswk, * pos = & poswk;
CDC_POS_PTYPE (pos) = CDC_PTYPE_TNO;
CDC_POS_TNO (pos) = tno; / * Track number * /
CDC_POS_IDX (pos) = x; / * Index number * / 

(d) Unchanged designation 

CdcPos poswk, * pos = & poswk;
CDC_POS_PTYPE (pos) = CDC_PTYPE_NOCHG;