SEGA SATURN DEVELOPER'S MANUAL

2.4 Sector structure

Figure 2.5 shows the sector physical format of CD-ROM and CD-ROM XA.
* GAME-CD uses three types of sectors: Mode1, Mode2 Form1, and Mode2 Form2.

Figure 2.5 CD-ROM and CD-ROM XA sector format

Mode2 format without form specification cannot be used.