would you consider adding an PC Engine CD, please?

[themabus]

ok, thank you very much!

[themabus]

one more thing:
when audio track changes into data we would fill the whole gap, with 00. on data->audio as i understand now we did this only for audio part, so ther's always around 150 empty data sectors at the end of the data track as well. but on PCE sometimes, maybe always, this layout is true for audio->data transition, only in reverse order, so first come blank audio sectors then empty data (but with header and edc/ecc), both parts about the same size. should not we keep those empty data sectors? to keep transition area structure valid. they are hard to read sometimes and each drive i have would treat them differently, but even if it is possible to determine size of each area, i gess they could be generated.

[themabus]

i've checked 12 CDs, and data part is always 150 frames. i guess it's no use to check it any further, the fate of this data is to get corrupted anyway but since CD specifications defines track type transition structure this way, we can generate 75 or 74 empty audio sectors (depending on gap) / 150 data. if you, guys, decide on this, i can resubmit CRCs for data tracks any time.

[gigadeath]

Actually I don't think I understand, it's beyond my comprehension skills

But I trust you, if there's something wrong please fix it

[F1ReB4LL]

Actually I don't think I understand, it's beyond my comprehension skills

Looks like he's talking about postgap for audiotracks and additional pregaps for datatracks, if I understood this correctly...

[themabus]

yes
on PCE this is how tracks change among different modes

Code: Select all

...DATA|150 ED|150 EA | AUDIO...
              |  GAP  | 
   Track n            | Track n+1


...AUDIO|75 EA|150 ED | DATA...
        |    GAP      | 
   Track n            | Track n+1

---------------------------------
ED..empty data sectors (header+00+edc/ecc)
EA..empry audio sectors (all 00)

it takes a time for a drive to react on type change, so 2nd part of transition area
would at least partly end up like garbage, it depends on drive how much
so we would all see different kind of junk in these parts and get different crcs
on data->audio: part of audio sectors would get scrambled, like data so we would
replace it with correct empty audio sectors, just all 00 like, it's all perfect what we do here
on audio->data: part of data sectors won't get scrambled, like they should
and we replace whole area with empty audio sectors but part of them were data

the truth is, emulators don't need it and i think burners can't burn it
they would fill gaps with track descriptor blocks or just redefine content freely
maybe there is software, maybe, but i don't know...
so anyway if we keep it, that data part, it would be more true to original
but harder to accomplish and like ...completely useless, i guess

[themabus]

ok, i resubmited everything +2 new cds but only crcs for data tracks should change
i'll keep checking every cd for that exact data sector number in gaps, not assuming 150 <- scrap that, let's do it perfect

[Jackal]

ok, i resubmited everything +2 new cds but only crcs for data tracks should change
i'll keep checking every cd for that exact data sector number in gaps, not assuming 150 <- scrap that, let's do it perfect

woops.. now the db is a mess I wish you just could have edited the old entries.. Dremora should definately give you moderator rights and perhaps remove -v- and cHr from this status because they're never around (anymore)

[themabus]

oh that would be great, even if for a short time while i get my pce cds done

[Jackal]

oh that would be great, even if for a short time while i get my pce cds done

short time? heh.. you're one of the biggest contributors.. I think moderator status is the least we could give you

slightly offtopic: do you also have SNK Neogeo CD discs?

edit: Dremora gave you moderator and added delete function, but I already deleted the dupe PCE for you