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- Newsgroups: comp.sys.amiga.misc
- Path: sparky!uunet!spool.mu.edu!umn.edu!csus.edu!netcom.com!damiel
- From: damiel@netcom.com (Paul Theodoropoulos)
- Subject: Re: Reasons for Amiga CD-ROM
- Message-ID: <1992Dec30.103903.19345@netcom.com>
- X-Spook-Fodder: hero heroin tree shrub bush birth life death FBI CIA NSA
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <n1314t@ofa123.fidonet.org> <Bzu958.DvD@news.iastate.edu> <1hqcs4INN4tb@pith.uoregon.edu> <C023rw.C34@news.iastate.edu>
- Date: Wed, 30 Dec 1992 10:39:03 GMT
- Lines: 55
-
- In <C023rw.C34@news.iastate.edu> barrett@iastate.edu (Marc N. Barrett) writes:
- > CD-ROM disks don't cost much more to manufacture than audio CDs. And audio
- >CDs cost next to nothing to manufacture. For example, a recent issue of an
- >audio magazine includes two audio CDs "free", for the $3.95 cover price of the
- >magazine.
-
- CD-ROM disks cost *exactly* the same to manufacture as audio CDs.
-
- > CD-ROM drives are slowly coming down in price. I have seen Mac CD-ROM
- >drives advertized for $400, and Mac hardware is always a bit overpriced. The
- >fact that Tandy and Commodore are able to put CD-ROM drives into their VIS and
- >CDTV products and still sell them for less than $700 shows that the CD-ROM
- >drives must have already come down in price quite a bit.
-
- the drive mechanism of a CD-ROM - exclusive of speed doublers of course - is
- exactly the same drive mechanism as an audio CD drive. the bare drive
- mechanism costs well less than $100. probably less than $50. again, exclusive
- of speed doublers. an CD audio unit has D/A converters, filters, and audio
- output circuitry, among other things. a CD-ROM drive dispenses with these, but
- includes enhanced error detection and correction circuitry and interface
- hardware.
-
- prices continue to drop due to increased manufacturing efficiency, economy
- of scale, and increased demand.
-
- > I don't pay much attention to hype, contrary to what people believe. I
- >just don't think 1.3 Gigabytes of potential inexpensive storage can be
- >dismissed very easily. Yes, I said 1.3 Gigabytes. There is no particular
- >reason why CD-ROM discs cannot be double-sided. They are single-sided now
- >because the extra storage is not needed.
-
- you may not pay much attention to hype, but neither do you pay much
- attention to fact. The principal reason why Compact Discs are not double-
- sided is because the manufacturing cost to do so would be considerably
- greater than that to produce two single-sided disks. There is no practical
- value in making double-sided disks. a double-sided disk would also have to
- be thicker due to the need for a specific substrate depth for the optical
- pickup system; thus there would be no real savings in "space" by making disks
- double-sided - two single-sided disks would be only slightly thicker than
- one double-sided disk.
-
- if you want to talk about "the future", CD-ROM is *not* a big player. think
- about the name for a minute, barc: CD-*ROM*.
-
- recordable systems are the only future of optical storage media, if we are
- going to natter on with pointless prognostications. recordable optical drives
- with the same capacity as CD-ROM will cost virtually the same as CD-ROM
- drives within a very few years. and have infinitely greater utility.
-
-
-
-
- --
- paul theodoropoulos damiel@netcom.com (hooools@well.sf.ca.us)
- Cosysop - Threat Management Institute BBS 707 935 1713
-