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From: wwarner@en.ecn.purdue.edu (Art Warner)
Newsgroups: comp.sys.amiga.multimedia
Subject: Re: CDTV titles on an A500?
Message-ID: <1991Jun4.050810.11726@en.ecn.purdue.edu>
Date: 4 Jun 91 05:08:10 GMT
Article-I.D.: en.1991Jun4.050810.11726
References: <1991May31.093712.47965@cc.usu.edu> <1991Jun3.054319.10135@news.iastate.edu>
Organization: Purdue University Engineering Computer Network
Lines: 37

In article <1991Jun3.054319.10135@news.iastate.edu> taab5@isuvax.iastate.edu writes:
>In article <1991May31.093712.47965@cc.usu.edu>, sl87m@cc.usu.edu (The Barking Pumpkin Digital Gratification Ensemble) writes:
>>
>   One thing that concerns me, though, is the likely problem of
>compatibility with the CDTV.  I've mentioned this before, and got no
>responses at all, so I will try again.  
>
>   The CDTV uses a modified 1.3 ROM.  The 1.3 ROM is 256K, however the
>CDTV uses a 512K ROM.  The extra 256K is filled with system software
>specific to the CDTV.  This 256K of software may not be present on an
>Amiga with the Commodore CD-ROM drive, and certainly will not be 
>present on an Amiga with any other CD-ROM drive.  There are other
>features of the CDTV that also may not be present on an Amiga with
>a Commodore CD-ROM drive, but the extra 256K of ROM is the most
>important one.
>
>   How is this problem going to be solved?  Obviously there is a great
>potential for CDTV software using some of the routines in this extra
>256K, and any software that does so may not run on an Amiga with the
>Commodore CD-ROM drive and will not run on Amiga with the Xetec CD-ROM
>drive.  
>
I have "played" with and "looked inside" the CDTV pretty good and have found
that the extra 256k Rom chip is mostly used for playing back CD+g disks and 
stores the CD user control functions that are on screen for CD+g.  Other than
that a friend of mine with the Xetec CD-Rom drive has ran every CD that we
could get our greedy hands on without a flaw, excep one.  Barney Bear would
not run!!!!!!  I know many of you fans out there are REAL dissappointed!
Apparently this particular package is utilizing some of the available hardware
tricks exclusive to CDTV.  I wonder how many more do?  

The important ones, World Vista, Military Powersr(sp?), and encyclopedias ran
without a glitch......YES, sound,pics,animation ran EXACTLY like a CDTV!
-- 
William "Art" Warner                 //\
CBM Amiga Student Rep.             \X/--\miga makes it happen..........
wwarner@en.ecn.purdue.edu          IBM, Apple, Sun, & Next make it expensive!