SEGA SATURN DEVELOPER'S MANUAL

Return to previous page ｜ Return to menu ｜ Go to next page

(2) CDDA file processing function added

Added CDDA file processing function. Reading a CDDA file means playing the music track specified by that file. However, SCSP must be set on the application side to output sound.
There are the following differences between CDDA files and general files.

Control over files
The only control that the file system performs on CDDA files is playback and playback range control. Playback mode is the default value (no repeat, move pickup).
Read ahead
Since CDDA file data does not enter the CD buffer, read-ahead processing and normal access are equivalent to that access.
File operation parameters
The retrieval mode, transfer mode, reading parameters, and retrieval parameters cannot be changed for CDDA files. Calling the following function on a CDDA file returns an error:
GFS_SetGmode
GFS_SetTmode
GFS_SetReadPara
GFS_SetTransPara

(3) File attribute

The file attribute value output by GFS_GetFileInfo has been changed as follows to conform to the CD-ROM XA standard.

 GFS_ATR_DIR 0x80
GFS_ATR_CDDA 0x40
GFS_ATR_INTLV 0x20
GFS_ATR_FORM2 0x10
GFS_ATR_FORM1 0x80
GFS_ATR_END_TBL 0x01

* GFS_ATR_CDDA was added to add the CDDA file processing function. The bit is 1 for CDDA files.
) Other constant names and meanings have not changed.

(4) GFS_Init and GFS_LoadDir function values If NULL is specified for the pointer to the directory information management structure in the

argument, the number of directory information stored in the CD block file system is returned as a function value.

Return to previous page ｜ Return to menu ｜ Go to next page

(2) CDDA file processing function added

(3) File attribute

(4) GFS_Init and GFS_LoadDir function values ​​

(4) GFS_Init and GFS_LoadDir function values