The physical format of GAME-CD for this game console complies with the Semi CD-ROM XA standard.
Therefore, interleaved recording, which previously depended on applications, can now be realized as a system, making it easier to play back images and audio in parallel.
"Semi CD-ROM XA" : CD-ROM XA with Model 1 track
■Disc size and recording time
We can only produce 12cm CDs. 8cm GAME-CD cannot be produced. To avoid trouble, limit the start time of the readout area to the following range.
Time of first LSN(#0)
00:02:00
Time of last LSN (~#283499)
~63:01:74
Lead-out area start time
~63:04:00
Therefore, the maximum recording time is 63 minutes . Multi-session is not available.
■Linear speed and track pitch
The linear velocity and track pitch of GAME-CD are fixed to the following values in order to improve track jump accuracy and speed up seek speed.
Linear velocity → 1.25 m/sec
Track pitch → 1.6 μm
■Disk format
The disc format complies with the following standards.
physical format
SONY and PHILIPS CD standards “RED BOOK”, “YELLOW BOOK”, “CD-ROM XA”
logical format
ISO9660
MPEG format
ISO11172
■Track layout
The inner side will be the CD-ROM area, and the outer side will be the CD-DA area.
■Sector structure
In addition to the traditional Mode1, the sector has Mode2 Form1 and Mode2 Form2 with subheaders. A variety of interleaved recordings are possible using file numbers and channel numbers.
■ISO9660 compliant
The ISO9660 standard does not specify the contents of logical sector numbers 0 to 15. CD producers can use it for boot programs and protection information for system startup.
By specifying this area in the disc format, GAME-CD can be started. No boot cartridge required. Logical sector numbers 16 and above comply with ISO9660.
