On Thu, 2006-06-29 at 22:44 +0100, Kelvin Lawson wrote:
> > This was the first thing I tried but with the toc file generated when I
> > ripped the bin file originally. It's got RW_RAW where you've got RW.
> > 
> > cdrdao told be the drive doesn't recognise the cue sheet variant.
> > 
> > Then I tried chaning all the RW_RAW to RW and the burn failed.
> 
> How about using the RW image you ripped earlier, and searching for some 
> of the CDG bytes you can see in the RW_RAW version? If a number of 96 
> byte CDG blocks are grouped together somewhere, we might be able to find 
> the location this way.
I thought of this, but if the drive is doing deinterleaving there won't
be any obvious byte pattern to search for...

I could search for data from a software deinterleaved .cdg file
though... good idea.

Progress report on my little experiment:

I've managed to burn the image with the injected subcode now (on a cd
write in another computer). The NEC doesn't seem to like burning from
toc files with RW data.

I have read the burnt disk back in on the NEC using cdrdao
--read-subchan rw etc

I now have an image which should have 0xA in the lower nibble of every
subcode byte. Unfortunately I haven't been able to spot these large
quantities of 0x?A in the hex editor. which suggests to me that the NEC
maybe wrong about it's own ability to read RW subcode (or cdrdao is
wrong)


The 0x?A bytes have been injected by the program I wrote because if I
read the disk in RW_RAW mode I get loads of "A" nibbles in the subcode.

To sum up:
I have injected the the bytes into subcode and burnt them to a disk.
I have read it back in RW mode.
I can't find any evidence that the NEC is reading the subcode out *at
all* in RW mode.

I find this all slightly disappointing but I have noticed one
interesting thing which I'll check out and see what I can come up with. 

Drew


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