Technical information

SEGA Confidential

• (ISO9660) File Name

The ISO9660 file name consists of a file name and a version number separated by a semicolon. The

file name is comprised of a name and a file extension, which are separated by a period. Arabic

numerals are used (for the supplementary volume descriptor, Kanji characters may also be used) for

the name and file extension. The number of characters must be limited to 8 or fewer for the name, and

3 or less for the file extension. The body does not necessarily require an extension; however, a file

cannot be specified if it lacks both a name and an extension (that is, with only a period).

Version numbers range from 1 through 32767. When the version number is omitted, the default value is 1.

• (ISO9660) Directory Names

Alphanumeric and kanji characters can be used in directory names, which can be 8 characters or

less (equivalent to 8 English numerals).

Defining the Entire Disk

The configuration of a disk as a whole is defined by placing lines between

the two lines

<Disk line> and <EndDisk line>. A single script file defines only a single

disk. The optional

<CatalogNo line> is used to add the disc catalog number. A file name

is specified so that the disc image is output as a

<Disk line> parameter. A file with this

file name is output as an MS-DOS file. Disks can have multiple sessions, with as few as

one.

Defining Sessions

Sessions are defined between a <Session line> and an <EndSession line>. The <Session

line> specifies the disc type. The disc image of the session section can be output as an MS-

DOS file by specifying the file name. The file name may be omitted.

There are four valid disc types handled by the VCD system:

• CDROM (includes CDDA tracks)

• CDI (for CD-i)

• ROMXA (for CD-ROM XA)*

• SEMIXA

* When creating a CD-ROMXA that includes a MODE1 track, use SEMIXA as the session definition.

However, as listed in page 7 of the DISC Format Standard Specifications (ST-040-R4-051795) (see note),

the disk is created so that when POINT=A0h, then PSEC=00H for the Saturn game disc.

Sessions begin with a lead-in area followed immediately by a system area, volume de-

scriptor set, multiple tracks, and a lead-out at the end. When no lead-in is defined, the

track definition is not valid.

Up to 99 tracks can be defined, each of which is numbered. The first track is track 1,

with the track numbers increasing by 1 in the defined order thereafter. While there are

several types of tracks, the CDDA track must be defined in the last track group.