This section summarizes specific requirements for DVD devices. The device also must meet the general requirements defined in the “Storage Peripherals Basic Features” and “PC 98 Design for Storage Components” sections in this chapter.
For information about the PC 98 requirements for DVD-Video and MPEG-2 playback performance, see the “Video and Broadcast Components” chapter in Part 4 of this guide.
For more information about DVD support under Windows and Windows NT, see the articles at http://www.microsoft.com/hwdev/devdes/.
25. DVD drive supports bus master DMA transfers
Required
Hardware decoders must support byte-aligned, multisegment, bus master DMA transfers. The drive must function without corrupting data in DMA mode.
ATAPI DVD drives and IDE system-board implementations must support DMA as specified in SFF 8090 (Mt. Fuji specification). DMA must be enabled by default.
26. DVD drive meets minimum compatibility requirements
Required
At a minimum, the DVD device must be compatible with the following formats to ensure that the DVD device can read earlier media:
The device must also be able to mount multisession CD-ROM discs, as described in the “CD-ROM drive is CD-Enhanced–compatible” requirement earlier in this chapter. However, there is no DVD drive support for CD-E and CD-R.
27. Device and driver support DVD command sets
| Required |
The device and driver must support the command set defined in SFF 8090 (Mt. Fuji specification). Specifically, the device and driver must support the commands in the following list.
| Code | Command name | Code | Command name | |
| 12h | Inquiry | 42h | Read sub-channel | |
| 00h | Test unit ready | Beh | Read CD | |
| 03h | Request sense | B9h | Read CD MSF | |
| 55h | Mode select (10) | 45h | Play audio (10) | |
| 5Ah | Mode sense (10) | 47h | Play audio MSF | |
| BDh | Mechanism status | 4Bh | Pause/resume | |
| 25h | Read C/DVD capacity | 4Eh | Stop play/scan | |
| 23h | Read formatted capacities | BAh | Scan | |
| Adh | Read DVD structure | 28h | Read (10) | |
| A8h | Read (12) | 08h | ATAPI soft reset | |
| A7h | Set read ahead | E5h | Check power mode | |
| 1Bh | Start/stop unit | 90h | Execute drive diagnostic | |
| 1Eh | Prevent/allow medium removal | E1h | Idle immediately | |
| 2Bh | Seek | 00h | NOP | |
| 4Ah | Get event status notification | A0h | ATAPI packet | |
| A4h | Report key | A1h | ATAPI identify device | |
| A3h | Send key | Efh | Set features | |
| 43h | Read TOC | E6h | Sleep | |
| 44h | Read header | E0h | Standby immediate |
28. DVD device meets SFF 8090 specification
Required
SFF 8090 (Mt. Fuji specification) defines the implementation requirements that the Windows operating system supports. For PC 98, a DVD device must comply with the following portions of SFF 8090:
29. DVD device uses high-speed expansion bus
| Required |
The DVD hardware must use a bus that supports high-speed transfer of multiple data types. Any DVD controller must be capable of sustained rates of 12 Mb/s minimum.
30. DVD drive supports UDF
Required
The drive must support UDF as defined in Universal Disk Format Specification, Version 1.02 or higher, available from the Optical Storage Technology Association at http://www.osta.org.
31. DVD device uses push-to-close design
Recommended
A motorized design is not required, but if it is implemented, the device must be designed so the user has three options for closing the device when inserting a disc:
32. DVD device supports defect management
| Required |
The drive must support defect management that is transparent to the operating system, according to industry standards. Defect management is defined in DVD Specification, Book A: Physical Specifications, published by Toshiba Corporation.
33. DVD device supports copyright protection
Required
The drive must support a licensed CSS copyright-protection scheme and support CSS-protected discs to ensure proper protection for all content produced in accordance with CSS, as defined in the DVD specification.
Software is provided as part of the Windows and Windows NT operating system support for DVD in order to facilitate the authentication process required by this scheme. This allows a DVD-ROM drive to authenticate and transfer keys with a CSS decrypter. Windows and Windows NT operating system software will act as the agent to allow either hardware or software decrypters to be authenticated.
For information, see the related articles on DVD support under Windows and Windows NT at http://www.microsoft.com/hwdev/devdes/.