TITLE
    AppleCD SC: General Description (Discontinued)
Article ID:
Created:
Modified: 		2595
3/1/88
6/1/94
TOPIC



    The AppleCD SC is an audio-capable CD-ROM (Compact Disc - Read Only Media)
    device with Apple SCSI ports. This peripheral device, about the same size as
    an Apple SCSI hard disk drive, reads compact discs with up to 550 MB
    capacity.

DISCUSSION


    Apple supports five formats for information on CDs:
    - CD-Audio
    - CD-ROM
    - HFS
    - ProDOS
    - High Sierra

    The AppleCD SC has a front-loading caddy for standard-size compact discs.
    The player accommodates stereo headphones or speakers through either the
    mini-phono jack in front or via the line level audio output ports in back
    of the device.

    This compact disc player has second-generation CD hardware, which contains
    better error checking in firmware, a 64K RAM buffer, half-height size, better
    small-block handling capabilities, and better CD-Audio results than earlier
    CD-ROM players.

    The AppleCD SC does a full-stroke seek and read in 500 milliseconds; its
    mode transfer rate is 154 KBytes per second. The hardware can recognize
    three compact disc data modes:
    - mode 1 (with a 2048-byte data block size)
    - mode 2 (with 2352-byte data blocks)
    - audio

    Since Apple systems request 512-byte data blocks, and our drivers interpret
    the data correctly in either case, the differences between mode 1 and mode 2
    are indistinguishable to the user.

    The AppleCD SC can be used with both the Apple II and Macintosh families,
    using the appropriate supplied software drivers. It can also be used on an
    AppleShare File Server to provide network access to workstations.



Document Information
Product Area: Peripherals
Category: CD-ROM
Sub Category: AppleCD SC

Copyright © 2000 Apple Computer, Inc. All rights reserved.