CD-ROM Peripherals

This section summarizes the requirements for CD-ROM peripherals and the specific features for PC 97.

25. Compliant with all general storage device requirements

These are defined in the "System Requirements for Storage Peripherals" section earlier in this chapter.

Note The recommendation for bus mastering for CD-ROM will become a requirement in 1998.

26. Performance: 4x or higher

The CD-ROM drive must perform at this minimum level when running in the Fully On power state. However, a device can spin slower when running in lower power states, as defined in the "Device Class Power Management Reference Specification" for the storage device class.

27. CD Enhanced compatible

For PC 97, the CD-ROM drive must be able to mount multisession CD-ROM disks, even if track 1 is Red Book audio. Microsoft recommends use of the Sony ReadTOC method for SCSI-2 multisession support as noted in the ATAPI SFF 8020i rev. 2.5.

CD Enhanced support must be Blue Book compliant, as defined in Enhanced Music CD Specification v. 1.0.

28. Supports required CD formats

At a minimum, the CD-ROM device must be compatible with these formats to ensure cross-media compatibility:

• Logical formats: CD Red Book, Yellow Book, White Book, and Blue Book.
• Physical formats: CD-E, CD-R2, CD-ROM, and CD-Audio.

CD-R (Orange Book format) can be implemented. There are no PC 97 requirements or recommendations.

29. CD changer

If an ATAPI-compatible CD changer is present (seven discs or less capacity), the device must be compliant with ATAPI SFF 8020i v. 2.6 or higher.

30. System BIOS supports El Torito No Emulation mode if CD-ROM is the boot device

For PC systems that use CD-ROM as the boot device, the system BIOS must support the No Emulation mode defined in the specification "El Torito — Bootable CD-ROM Format Specification Version 1.0," published by IBM and Phoenix.