Technical information

SEGA Confidential

SATURN Virtual CD System User's Manual

Comments

Characters that follow a semicolon (;) to the end of the line become comments.

Except at the start of a line, the semicolon must be preceded by a blank character in

order to differentiate it from a semicolon used to designate the version number of an

ISO9600 file name.

Blank characters:

• Space code (0x20)

• Horizontal tab code (0x09)

• Vertical tab code (0x0b)

• Home feed (0x0c)

• Line feed (0x0a)

Example:

; This is a comment. A blank character is not required when at the

start of the line.

File A ; This is also a comment. A blank character is inserted between A

and ;.

File A; Comments are not recognized if a blank character is not inserted

between A and ;.

The following is an explanation of selected command parameters that are used to

configure the disc image.

• Relative positions in a session

The positions on the disk are expressed by “Relative Positions in Session.” The relative positions in

a session are divided by a colon (:) between the minute, second, and frame values and show the

time as 00:00:00 immediately after the end of the LeadIn. In actual disc images, the position is

changed to an appropriate address that corresponds to the session position.

• Relative position in a file

The position in a file, is specified as the relative position from the beginning of the file. The format

is minutes:seconds:frame. In other words, the file begins at 00:00:00.

• Identifier

Several identifiers are specified in the volume descriptor set definition. In the primary volume

descriptor, the representation can be in alphabet (uppercase), numeric, and underscore characters.

In the supplementary volume descriptor, Kanji character codes can be used. When Kanji character

codes are used, the user and the developer must decide on a code system in advance.

• Date

The format for the date is expressed as date "DD", month "MM", and year "YY" (DD/MM/YY),

which is then followed by a space that separates the date from the time, the format of which is

hh:mm:ss:cc:gg. Here "hh" is hour, "mm" is minute, "ss" is second, "cc" is 100th of a second, and

"gg" is the difference from GreenwichMean Time. In the case of Japan, the time difference is 9

hours; therefore, gg is 36.