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- Path: sparky!uunet!pipex!warwick!uknet!mcsun!sun4nl!relay.philips.nl!philica!adrie
- From: adrie@ica.philips.nl (Adrie Koolen)
- Newsgroups: alt.cd-rom
- Subject: Re: CDROM-XA and Photo-CD
- Message-ID: <1992Nov9.090424.280@ica.philips.nl>
- Date: 9 Nov 92 09:04:24 GMT
- References: <1dc6bnINNs82@darkstar.UCSC.EDU>
- Organization: Philips Consumer Electronics, Eindhoven, The Netherlands
- Lines: 30
-
- In article <1dc6bnINNs82@darkstar.UCSC.EDU> pustule@cats.ucsc.edu (Thaddeus H. Wood) writes:
- >What is CDROM-XA?
-
- CDROM-XA specifies a `bridge format' so that a CDROM-XA disc can be read
- on a CD-I player as well as on a PC under MSCDEX (provided that you use
- a conforming (.SYS) driver. On a normal yellow-book CDROM, a data track
- contains only mode-1 data sectors. On a CDROM-XA, a (the) data track
- contains only mode-2 data sectors. A mode-2 sector can be of two formats,
- form-1 and form-2. A form-1 sector contains 2048 bytes of user data,
- together with EDC and ECC bytes. A form-2 sector contains 2324 bytes of
- raw data (e.g. ADPCM audio or video data). If the device driver delivers
- 2048 bytes of data when MSCDEX asks for it, regardless whether the sector
- is mode-1 or mode-2/form-1, the PC is CDROM-XA compatible.
-
- >I want a really quick drive, perhaps the NEC CDR-74a?
- >And I want to be able to read Photo-CD disks, as well
- >as the CD-I, and XA. Basically, I want a drive that
- >will do it all, and do it quickly.
- >
- >Is there such an animal? Or am I asking for too much?
-
- The NEC CDR-74/84 will read sectors from CDROM's, CDROM-XA's and CD-I's.
- Interpreting them is another problem. For interpreting Photo-CD's, you
- will need the Kodak Photo-CD Access software. You can't play a CD-I on
- a PC unless you can get the PC to emulate a CD-I player with all its
- complex video and audio features. MSCDEX also isn't able to read the
- CD-I file system, but this might be fairly easy to fix, I don't know.
-
- Adrie Koolen (adrie@ica.philips.nl)
- Philips Consumer Electronics, Eindhoven, the Netherlands
-