Appendix A
A-I
APPENDIX A
PIONEER CD-ROM DRIVES - AUDIO FUNCTIONS
The CD-ROM drives consist of two logical subsystems - a CD reader and a controller. The controller
receives SCSI commands, and sends commands to the reader for execution as needed. This allows audio
commands to be executed in the background. At times, the two subsystems may be operating
independently.
In addition to the normal audio commands, the CD-ROM drives support the Pioneer Laser Disc Player
control commands. These alphanumeric mnemonics may be sent to the drive using the vendor-unique
command WRITE CDP (Character Device Player). The WRITE READ CDP command strings are
passed through the controller directly to the reader. The controller checks the length and termination of
the command string, and, if valid, returns a GOOD status. The controller will generate a Check
Condition with a sense key of ILLEGAL REQUEST if the string is not valid. The controller then passes
the command string to the reader for execution. To receive the results of the command string, the
initiator must use the READ CDP command to get the status from the reader. The reader passes the
result data through the controller. Invalid commands or execution errors will not cause SCSI errors, but
will be reported by the READ CDP command.
Certain types of data, such as the disc TOC, are stored by the controller once they have been read from
the disc. If a disc has been accessed, a READ TOC command will not require a disc access, which could
include a disc change. Instead, the TOC data is transferred from controller memory.
Содержание DR-706S
Страница 2: ...CD ROM SCSI 2 Command Set R e f e r e n c e M a n u a l V e r s i o n 3 1 OB U0077C ...
Страница 36: ...Inquiry 23 this page has been left intentionally blank ...
Страница 71: ...CD ROM SCSI 2 COMMAND REFERENCE MANUAL VERSION 3 1 OB U0077C 58 this page has been left intentionally blank ...
Страница 106: ...Read CD ROM Capacity 93 this page has been left intentionally blank ...
Страница 124: ...Read Sub Channel 111 this page has been left intentionally blank ...
Страница 130: ...Read TOC 117 this page has been left intentionally blank ...
Страница 140: ...Request Sense 127 this page has been left intentionally blank ...
Страница 158: ...Stop Play Scan 145 2 40 Stop Play Scan 4Eh The STOP PLAY SCAN CD ROM Command stops playback of CD ROM audio commands ...
Страница 164: ...Verify 12 151 2 43 Verify 12 AFh Operation code is AFh See VERIFY 10 for complete description of this command ...
Страница 172: ...Read CD DA 159 this page has been left intentionally blank ...