1 (edited by p_star 2007-10-19 06:59:31)

Topic: Mega-CD / Sega Saturn dumping

Hi, I need some info about Mega CD dumping

I used to mantain the No-Intro Megadrive dat (I had a 2 years pause but I'm still working on it), I found this website and since a have many MegaCD discs too I think it's time to dump them.

I looked at the dumping guide, is it valid for MegaCD too? Will the dumps be perfect without missing info? I ask this because AFAIK the disc structure is different between the systems.

Also who I need to contact to give the info to?

Re: Mega-CD / Sega Saturn dumping

MCD Dumping absolutely same as PSX Dumping.
If you have Pal MCD Discs, is quite probable, that gaps between audiotracks will be equal 0.
To show the additional information on a disk, you should look the first 16 sectors by means of ISOBuster or CDRWin.

Re: Mega-CD / Sega Saturn dumping

I have only japanese discs.

I tried dumping a disc (Record of Lodoss War) but when I proceeded deleting the pregap attached the the first track (2 seconds) i noticed that i was deleting actual data too. Both CDRWin and EAC tells that there's a 2 seconds pregap, but if you look with an hex editor the silence is less than 352800 bytes.

Re: Mega-CD / Sega Saturn dumping

Another issue. When searching for the disc offset, I should look for end sector of the data track and then take away 150 sectors (352800 bytes) which are the pregap.

The resulting sector (x-150) is full of data! And the next too! The zeros begin only 2 sectors ahead of the calculated one.

Re: Mega-CD / Sega Saturn dumping

cdrwin report this

FILE "AB.BIN" BINARY
  TRACK 01 MODE1/2352
    INDEX 01 00:00:00
  TRACK 02 AUDIO
    PREGAP 00:02:00
    INDEX 01 00:44:55
  TRACK 03 AUDIO
    INDEX 00 01:53:28
    INDEX 01 01:55:27
  TRACK 04 AUDIO
    INDEX 00 03:03:64
    INDEX 01 03:05:63
  TRACK 05 AUDIO
    INDEX 00 03:36:42
    INDEX 01 03:38:41
  TRACK 06 AUDIO
    INDEX 00 04:59:07
    INDEX 01 05:01:06
  TRACK 07 AUDIO
    INDEX 00 10:30:00
    INDEX 01 10:31:74
  TRACK 08 AUDIO
    INDEX 00 15:58:48
    INDEX 01 16:00:47
  TRACK 09 AUDIO
    INDEX 00 21:43:67
    INDEX 01 21:45:66
  TRACK 10 AUDIO
    INDEX 00 26:40:19
    INDEX 01 26:42:18
  TRACK 11 AUDIO
    INDEX 00 31:47:38
    INDEX 01 31:49:37
  TRACK 12 AUDIO
    INDEX 00 37:06:03
    INDEX 01 37:08:02

eac reports the same gaps

Re: Mega-CD / Sega Saturn dumping

eac reports this

http://img404.imageshack.us/img404/5019/immaginefz2.th.jpg

Re: Mega-CD / Sega Saturn dumping

So which software should I use to get a clean data track without gaps and without having to use "resize" tool?

Isobuster? CDMage?

Re: Mega-CD / Sega Saturn dumping

I think I got the data track process. If you use CDMage with a full CDRWin image to extract the data track, you get it without gap already, 352800 bytes smaller than a data track ripped directly with CDRWin or IsoBuster.

It seems to me that EAC appends correctly the gap at the beginning of the first audio track, using the "appends gaps to next track" option. All the discs I have report this gap info with EAC:

Track01 (data)      Gap 2:00
Track02 (audio)    Gap 2:00
Track03 (audio)    Gap 1.74
Track04 (audio)    Gap 1.74

etc. etc.

From the third track on, the gap is always 1.74 seconds, while the first 2 gaps are 2 seconds.


The most confusing thing is the offset issue. AccurateRip reports my drive has +6 offset, so 6-30 = -24

Every disc has a different offsent, usually it's huge because the calculated sector which should end the first track is full of data, silence begins after a couple sectors, 6000+ bytes after the calculated end.

For example Record of Lodoss War has 6796 bytes after the end calculated by CDRWin, 6796/4 = 1699 samples

So the offset I should put in EAC is  1699 = (-24) + x ; x = 1723   right?


I get strange results, for example :

Funky Horror Band       +1686
Record of Lodoss War   +1723

Is it normal to have such high offsets? Are my calcutions wrong?


I think it would be great to have other dumps to compare my results with. I have the following original discs, all japanese, if someone has them too can he help me comparing?

Yumemi Yakata no Monogatari
Wolfchild
Lunar the Silver Star
Heavy Nova
Dennin Aleste
Rise of the Dragon
Prince of Persia
Super League CD
Sega Classic Arcade Collection
F1 Circus CD
Heavenly Symphony
AX-101
Ranma 1/2
Quiz Scramble Special
Vay
Funky Horror Band
Sega Games Can Vol. 1
Burai
Silpheed
Earnest Evans
After Burne III
Sangokushi III
Nostalgia 1907
Record of Lodoss War
Jikochushinha 2
Sonic CD
Shining Force CD
Tenkafubu

Re: Mega-CD / Sega Saturn dumping

gigadeath wrote:

The resulting sector (x-150) is full of data! And the next too! The zeros begin only 2 sectors ahead of the calculated one. I get strange results, for example :
Funky Horror Band       +1686
Record of Lodoss War   +1723

Thats right. The Offset is realy big. For Example: I Have JAP Saturn discs whit offset +2000 and more.

gigadeath wrote:

I have only japanese discs.

Its bad. Jap discs for sega saturn or MCD is hard to correctly copying.

First. Pregap of 2 Track in 99 % of cases it will be equal to 2 seconds. The unique method of detection correct pregap - to look in CDRWin or IsoBuster the end  of data track. The place where comes to an end date and begins garbage or zeros -  is the beginning pregap.

Second. Much more JAP discs have gaps between audiotracks of 1.74 seconds. While we cannot tell, that it is a mistake of record of a disk. Perhaps it is mistake EAC smile Therefore it is very important to check up gaps time on various drives, at various " gaps detection methods ".


The third. The part of last audiotrack JAP disks is in many in the field of Lead-Out. That are correct to copy last audiotrack, you should take advantage of a drive with negative offset. A minimum, that you should make - to copy an audiotrack on two drives and to compare them.


gigadeath wrote:

Every disc has a different offsent, usually it's huge because the calculated sector which should end the first track is full of data, silence begins after a couple sectors, 6000+ bytes after the calculated end.
For example Record of Lodoss War has 6796 bytes after the end calculated by CDRWin, 6796/4 = 1699 samples
So the offset I should put in EAC is  1699 = (-24) + x ; x = 1723   right?

Right smile Offset in EAC to correct copying is +1699.

Re: Mega-CD / Sega Saturn dumping

gigadeath, You can copying here data from last sector with garbage?

Re: Mega-CD / Sega Saturn dumping

Below is sector 80951. CDRWin reports that the LBA sector that should end track01 is 81099

81099 - 150 = 80949

sectors 80949 and 80950 are full of data. As you can see the first sector with zeros is 80951 (below)

I count 2092 bytes of data, so I did 2352 + 2352 + 2092 = 6796 bytes / 4 = 1699 samples



0000 : E8 6E CE AC 54 7D FF 61  80 28 60 1E A8 08 7E 86   .n..T}.a.(`...~.
0010 : A0 62 F8 29 82 9E E1 A8  48 7E B6 A0 76 F8 26 C2   .b.)....H~..v.&.
0020 : 9A D1 AB 1C 7F 49 E0 36  C8 16 D6 8E DE E4 58 4B   .....I.6......XK
0030 : 7A B7 63 36 A9 D6 FE DE  C0 58 50 3A BC 13 31 CD   z.c6.....XP:..1.
0040 : D4 55 9F 7F 28 20 1E 98  08 6A 86 AF 22 FC 19 81   .U..( ...j.."...
0050 : CA E0 57 08 3E 86 90 62  EC 29 8D DE E5 98 4B 2A   ..W.>..b.)....K*
0060 : B7 5F 36 B8 16 F2 8E C5  A4 53 3B 7D D3 61 9D E8   ._6......S;}.a..
0070 : 69 8E AE E4 7C 4B 61 F7  68 46 AE B2 FC 75 81 E7   i...|Ka.hF...u..
0080 : 20 4A 98 37 2A 96 9F 2E  E8 1C 4E 89 F4 66 C7 6A    J.7*.....N..f.j
0090 : D2 AF 1D BC 09 B1 C6 F4  52 C7 7D 92 A1 AD B8 7D   ........R.}....}
00A0 : B2 A1 B5 B8 77 32 A6 95  BA EF 33 0C 15 C5 CF 13   ....w2....3.....
00B0 : 14 0D CF 45 94 33 2F 55  DC 3F 19 D0 0A DC 07 19   ...E.3/U.?......
00C0 : C2 8A D1 A7 1C 7A 89 E3  26 C9 DA D6 DB 1E DB 48   .....z..&......H
00D0 : 5B 76 BB 66 F3 6A C5 EF  13 0C 0D C5 C5 93 13 2D   [v.f.j.........-
00E0 : CD DD 95 99 AF 2A FC 1F  01 C8 00 56 80 3E E0 10   .....*.....V.>..
00F0 : 48 0C 36 85 D6 E3 1E C9  C8 56 D6 BE DE F0 58 44   H.6......V....XD
0100 : 3A B3 53 35 FD D7 01 9E  80 68 60 2E A8 1C 7E 89   :.S5.....h`...~.
0110 : E0 66 C8 2A D6 9F 1E E8  08 4E 86 B4 62 F7 69 86   .f.*.....N..b.i.
0120 : AE E2 FC 49 81 F6 E0 46  C8 32 D6 95 9E EF 28 4C   ...I...F.2....(L
0130 : 1E B5 C8 77 16 A6 8E FA  E4 43 0B 71 C7 64 52 AB   ...w.....C.q.dR.
0140 : 7D BF 61 B0 28 74 1E A7  48 7A B6 A3 36 F9 D6 C2   }.a.(t..Hz..6...
0150 : DE D1 98 5C 6A B9 EF 32  CC 15 95 CF 2F 14 1C 0F   ...\j..2..../...
0160 : 49 C4 36 D3 56 DD FE D9  80 5A E0 3B 08 13 46 8D   I.6.V....Z.;..F.
0170 : F2 E5 85 8B 23 27 59 DA  BA DB 33 1B 55 CB 7F 17   ....#'Y...3.U...
0180 : 60 0E A8 04 7E 83 60 61  E8 28 4E 9E B4 68 77 6E   `...~.`a.(N..hwn
0190 : A6 AC 7A FD E3 01 89 C0  66 D0 2A DC 1F 19 C8 0A   ..z.....f.*.....
01A0 : D6 87 1E E2 88 49 A6 B6  FA F6 C3 06 D1 C2 DC 51   .....I.........Q
01B0 : 99 FC 6A C1 EF 10 4C 0C  35 C5 D7 13 1E 8D C8 65   ..j...L.5......e
01C0 : 96 AB 2E FF 5C 40 39 F0  12 C4 0D 93 45 AD F3 3D   ....\@9.....E..=
01D0 : 85 D1 A3 1C 79 C9 E2 D6  C9 9E D6 E8 5E CE B8 54   ....y.......^..T
01E0 : 72 BF 65 B0 2B 34 1F 57  48 3E B6 90 76 EC 26 CD   r.e.+4.WH>..v.&.
01F0 : DA D5 9B 1F 2B 48 1F 76  88 26 E6 9A CA EB 17 0F   ....+H.v.&......
0200 : 4E 84 34 63 57 69 FE AE  C0 7C 50 21 FC 18 41 CA   N.4cWi...|P!..A.
0210 : B0 57 34 3E 97 50 6E BC  2C 71 DD E4 59 8B 7A E7   .W4>.Pn.,q..Y.z.
0220 : 63 0A A9 C7 3E D2 90 5D  AC 39 BD D2 F1 9D 84 69   c...>..].9.....i
0230 : A3 6E F9 EC 42 CD F1 95  84 6F 23 6C 19 ED CA CD   .n..B....o#l....
0240 : 97 15 AE 8F 3C 64 11 EB  4C 4F 75 F4 27 07 5A 82   ....<d..LOu.'.Z.
0250 : BB 21 B3 58 75 FA A7 03  3A 81 D3 20 5D D8 39 9A   .!.Xu...:.. ].9.
0260 : 92 EB 2D 8F 5D A4 39 BB  52 F3 7D 85 E1 A3 08 79   ..-.].9.R.}....y
0270 : C6 A2 D2 F9 9D 82 E9 A1  8E F8 64 42 AB 71 BF 64   ..........dB.q.d
0280 : 70 2B 64 1F 6B 48 2F 76  9C 26 E9 DA CE DB 14 5B   p+d.kH/v.&.....[
0290 : 4F 7B 74 23 67 59 EA BA  CF 33 14 15 CF 4F 14 34   O{t#gY...3...O.4
02A0 : 0F 57 44 3E B3 50 75 FC  27 01 DA 80 5B 20 3B 58   .WD>.Pu.'...[ ;X
02B0 : 13 7A 8D E3 25 89 DB 26  DB 5A DB 7B 1B 63 4B 69   .z..%..&.Z.{.cKi
02C0 : F7 6E C6 AC 52 FD FD 81  81 A0 60 78 28 22 9E 99   .n..R.....`x("..
02D0 : A8 6A FE AF 00 7C 00 21  C0 18 50 0A BC 07 31 C2   .j...|.!..P...1.
02E0 : 94 51 AF 7C 7C 21 E1 D8  48 5A B6 BB 36 F3 56 C5   .Q.||!..HZ..6.V.
02F0 : FE D3 00 5D C0 39 90 12  EC 0D 8D C5 A5 93 3B 2D   ...].9........;-
0300 : D3 5D 9D F9 A9 82 FE E1  80 48 60 36 A8 16 FE 8E   .].......H`6....
0310 : C0 64 50 2B 7C 1F 61 C8  28 56 9E BE E8 70 4E A4   .dP+|.a.(V...pN.
0320 : 34 7B 57 63 7E A9 E0 7E  C8 20 56 98 3E EA 90 4F   4{Wc~..~. V.>..O
0330 : 2C 34 1D D7 49 9E B6 E8  76 CE A6 D4 7A DF 63 18   ,4..I...v...z.c.
0340 : 29 CA 9E D7 28 5E 9E B8  68 72 AE A5 BC 7B 31 E3   )...(^..hr...{1.
0350 : 54 49 FF 76 C0 26 D0 1A  DC 0B 19 C7 4A D2 B7 1D   TI.v.&......J...
0360 : B6 89 B6 E6 F6 CA C6 D7  12 DE 8D 98 65 AA AB 3F   ............e..?
0370 : 3F 50 10 3C 0C 11 C5 CC  53 15 FD CF 01 94 00 6F   ?P.<....S......o
0380 : 40 2C 30 1D D4 09 9F 46  E8 32 CE 95 94 6F 2F 6C   @,0....F.2...o/l
0390 : 1C 2D C9 DD 96 D9 AE DA  FC 5B 01 FB 40 43 70 31   .-.......[..@Cp1
03A0 : E4 14 4B 4F 77 74 26 A7  5A FA BB 03 33 41 D5 F0   ..KOwt&.Z...3A..
03B0 : 5F 04 38 03 52 81 FD A0  41 B8 30 72 94 25 AF 5B   _.8.R...A.0r.%.[
03C0 : 3C 3B 51 D3 7C 5D E1 F9  88 42 E6 B1 8A F4 67 07   <;Q.|]...B....g.
03D0 : 6A 82 AF 21 BC 18 71 CA  A4 57 3B 7E 93 60 6D E8   j..!..q..W;~.`m.
03E0 : 2D 8E 9D A4 69 BB 6E F3  6C 45 ED F3 0D 85 C5 A3   -...i.n.lE......
03F0 : 13 39 CD D2 D5 9D 9F 29  A8 1E FE 88 40 66 B0 2A   .9.....)....@f.*
0400 : F4 1F 07 48 02 B6 81 B6  E0 76 C8 26 D6 9A DE EB   ...H.....v.&....
0410 : 18 4F 4A B4 37 37 56 96  BE EE F0 4C 44 35 F3 57   .OJ.77V....LD5.W
0420 : 05 FE 83 00 61 C0 28 50  1E BC 08 71 C6 A4 52 FB   ....a.(P...q..R.
0430 : 7D 83 61 A1 E8 78 4E A2  B4 79 B7 62 F6 A9 86 FE   }.a..xN..y.b....
0440 : E2 C0 49 90 36 EC 16 CD  CE D5 94 5F 2F 78 1C 22   ..I.6......_/x."
0450 : 89 D9 A6 DA FA DB 03 1B  41 CB 70 57 64 3E AB 50   ........A.pWd>.P
0460 : 7F 7C 20 21 D8 18 5A 8A  BB 27 33 5A 95 FB 2F 03   .| !..Z..'3Z../.
0470 : 5C 01 F9 C0 42 D0 31 9C  14 69 CF 6E D4 2C 5F 5D   \...B.1..i.n.,_]
0480 : F8 39 82 92 E1 AD 88 7D  A6 A1 BA F8 73 02 A5 C1   .9.....}....s...
0490 : BB 10 73 4C 25 F5 DB 07  1B 42 8B 71 A7 64 7A AB   ..sL%....B.q.dz.
04A0 : 63 3F 69 D0 2E DC 1C 59  C9 FA D6 C3 1E D1 C8 5C   c?i....Y.......\
04B0 : 56 B9 FE F2 C0 45 90 33  2C 15 DD CF 19 94 0A EF   V....E.3,.......
04C0 : 47 0C 32 85 D5 A3 1F 39  C8 12 D6 8D 9E E5 A8 4B   G.2....9.......K
04D0 : 3E B7 50 76 BC 26 F1 DA  C4 5B 13 7B 4D E3 75 89   >.Pv.&...[.{M.u.
04E0 : E7 26 CA 9A D7 2B 1E 9F  48 68 36 AE 96 FC 6E C1   .&...+..Hh6...n.
04F0 : EC 50 4D FC 35 81 D7 20  5E 98 38 6A 92 AF 2D BC   .PM.5.. ^.8j..-.
0500 : 1D B1 C9 B4 56 F7 7E C6  A0 52 F8 3D 82 91 A1 AC   ....V.~..R.=....
0510 : 78 7D E2 A1 89 B8 66 F2  AA C5 BF 13 30 0D D4 05   x}....f.....0...
0520 : 9F 43 28 31 DE 94 58 6F  7A AC 23 3D D9 D1 9A DC   .C(1..Xoz.#=....
0530 : 6B 19 EF 4A CC 37 15 D6  8F 1E E4 08 4B 46 B7 72   k..J.7......KF.r
0540 : F6 A5 86 FB 22 C3 59 91  FA EC 43 0D F1 C5 84 53   ....".Y...C....S
0550 : 23 7D D9 E1 9A C8 6B 16  AF 4E FC 34 41 D7 70 5E   #}....k..N.4A.p^
0560 : A4 38 7B 52 A3 7D B9 E1  B2 C8 75 96 A7 2E FA 9C   .8{R.}....u.....
0570 : 43 29 F1 DE C4 58 53 7A  BD E3 31 89 D4 66 DF 6A   C)...XSz..1..f.j
0580 : D8 2F 1A 9C 0B 29 C7 5E  D2 B8 5D B2 B9 B5 B2 F7   ./...).^..].....
0590 : 35 86 97 22 EE 99 8C 6A  E5 EF 0B 0C 07 45 C2 B3   5.."...j.....E..
05A0 : 11 B5 CC 77 15 E6 8F 0A  E4 07 0B 42 87 71 A2 A4   ...w.......B.q..
05B0 : 79 BB 62 F3 69 85 EE E3  0C 49 C5 F6 D3 06 DD C2   y.b.i....I......
05C0 : D9 91 9A EC 6B 0D EF 45  8C 33 25 D5 DB 1F 1B 48   ....k..E.3%....H
05D0 : 0B 76 87 66 E2 AA C9 BF  16 F0 0E C4 04 53 43 7D   .v.f.........SC}
05E0 : F1 E1 84 48 63 76 A9 E6  FE CA C0 57 10 3E 8C 10   ...Hcv.....W.>..
05F0 : 65 CC 2B 15 DF 4F 18 34  0A 97 47 2E B2 9C 75 A9   e.+..O.4..G...u.
0600 : E7 3E CA 90 57 2C 3E 9D  D0 69 9C 2E E9 DC 4E D9   .>..W,>..i....N.
0610 : F4 5A C7 7B 12 A3 4D B9  F5 B2 C7 35 92 97 2D AE   .Z.{..M....5..-.
0620 : 9D BC 69 B1 EE F4 4C 47  75 F2 A7 05 BA 83 33 21   ..i...LGu.....3!
0630 : D5 D8 5F 1A B8 0B 32 87  55 A2 BF 39 B0 12 F4 0D   .._...2.U..9....
0640 : 87 45 A2 B3 39 B5 D2 F7  1D 86 89 A2 E6 F9 8A C2   .E..9...........
0650 : E7 11 8A 8C 67 25 EA 9B  0F 2B 44 1F 73 48 25 F6   ....g%...+D.sH%.
0660 : 9B 06 EB 42 CF 71 94 24  6F 5B 6C 3B 6D D3 6D 9D   ...B.q.$o[l;m.m.
0670 : ED A9 8D BE E5 B0 4B 34  37 57 56 BE BE F0 70 44   ......K47WV...pD
0680 : 24 33 5B 55 FB 7F 03 60  01 E8 00 4E 80 34 60 17   $3[U...`...N.4`.
0690 : 68 0E AE 84 7C 63 61 E9  E8 4E CE B4 54 77 7F 66   h...|ca..N..Tw.f
06A0 : A0 2A F8 1F 02 88 01 A6  80 7A E0 23 08 19 C6 8A   .*.......z.#....
06B0 : D2 E7 1D 8A 89 A7 26 FA  9A C3 2B 11 DF 4C 58 35   ......&...+..LX5
06C0 : FA 97 03 2E 81 DC 60 59  E8 3A CE 93 14 6D CF 6D   ......`Y.:...m.m
06D0 : 94 2D AF 5D BC 39 B1 D2  F4 5D 87 79 A2 A2 F9 B9   .-.].9...].y....
06E0 : 82 F2 E1 85 88 63 26 A9  DA FE DB 00 5B 40 3B 70   .....c&.....[@;p
06F0 : 13 64 0D EB 45 8F 73 24  25 DB 5B 1B 7B 4B 63 77   .d..E.s$%.[.{Kcw
0700 : 69 E6 AE CA FC 57 01 FE  80 40 60 30 D7 98 5E 77   i....W...@`0..^w
0710 : 48 64 36 AB 56 FF 7E C0  30 A5 D1 C9 0A 91 C7 2C   Hd6.V.~.0......,
0720 : 52 9D FD A9 81 BE E0 70  48 24 36 9B 56 EB 7E CF   R......pH$6.V.~.
0730 : 60 54 28 3F 5E 90 38 6C  12 AD CD BD 95 B1 AF 34   `T(?^.8l.......4
0740 : 7C 17 61 CE A8 54 7E BF  60 70 28 24 1E 9B 48 6B   |.a..T~.`p($..Hk
0750 : 76 AF 66 FC 2A C1 DF 10  58 0C 3A 85 D3 23 1D D9   v.f.*...X.:..#..
0760 : C9 9A CA 62 DE DA 48 54  36 BF 56 F0 3E C4 18 A7   ...b..HT6.V.>...
0770 : A6 C9 F5 D1 87 1C 62 89  E9 A6 CE FA D4 43 1F 71   ......b......C.q
0780 : C8 24 56 9B 7E EB 60 4F  68 34 2E 97 5C 6E B9 EC   .$V.~.`Oh4..\n..
0790 : 72 CD E5 95 8B 2F 27 5C  1A B9 CB 32 D7 55 9E BF   r..../'\...2.U..
07A0 : 28 70 1E A4 08 7B 46 A3  72 F9 E5 82 CB 21 97 58   (p...{F.r....!.X
07B0 : 6E BA AC 73 3D E5 D1 8B  FF 62 C9 07 B6 CF 36 D4   n..s=....b....6.
07C0 : 16 DF 4E D8 1F F4 97 7B  2E A3 5C 79 F9 E2 C2 C9   ..N....{..\y....
07D0 : 91 96 EC 6E CD EC 55 8D  FF 25 FB 17 2D 50 33 CE   ...n..U..%..-P3.
07E0 : 67 1C A3 21 B9 D8 72 DA  A5 9B 3B 2B 53 5F 7D F8   g..!..r...;+S_}.
07F0 : 21 82 0B 04 5F 2B 32 76  93 BF 78 0C 22 85 D9 A3   !..._+2v..x."...
0800 : 1A F9 CB 02 D7 41 9E B0  68 74 2E A7 5C 7A 82 17   .....A..ht..\z..
0810 : 00 0B 22 3B 21 B5 D8 1C  5A 89 FB 26 C3 5A D1 FB   ..";!...Z..&.Z..
0820 : 1C 43 49 F1 F6 C4 1C 43  7D 5F 83 24 00 00 00 00   .CI....C}_.$....
0830 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0840 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0850 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0860 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0870 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0880 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0890 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
08A0 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
08B0 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
08C0 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
08D0 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
08E0 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
08F0 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0900 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0910 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................
0920 : 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00   ................

Re: Mega-CD / Sega Saturn dumping

Right smile Offset in EAC to correct copying is +1699.

I put +1723 in EAC. Should I count the -24 or not? Is the info on AccurateRip useless?


+6 is the offset of my drive with AccurateRip info
-30 is the correction I found in the guide
-24 is the resulting offset

+1699 is the disc offset right? So should I consider the disc offset only or the drive offset too?

Should I put +1699 or +1723?

Re: Mega-CD / Sega Saturn dumping

The Correct offset for dumping whit EAC is 1700 !!!

The Write offset for DB guide is +1694 EAC / +1724 PR

Re: Mega-CD / Sega Saturn dumping

sorry but were does these number come from?

Why 1700? What does mean +1694 EAC / +1724 PR?

Re: Mega-CD / Sega Saturn dumping

amount of scrambled data = 1699, so +1699 is what you use in EAC for this specific drive (your calculation was correct).

the factory write offset (offset added during manufacturing of that particular disc, only used for information purposes and not for dumping) should be 1699 -24 (+6-30) = +1675

I hope p_star can explain why he mentions +1700 instead of +1699?

also, nice to see no-intro working on cd-based media smile

Re: Mega-CD / Sega Saturn dumping

I got most of the steps, and I dumped a couple discs, but I think it's best to wait posting info until someone else can confirm my result dumping any CD I posted above.

I find little problems all the time, I noticed that one of my drives (the one I made the screenshot above with) reports this gaps

2:00
2:00
1.74

etc. all 1.74 after that

while the other drive reports

2:00
1.74
1.74

etc. all 1.74 after that

This is with gap detection method A, the other methods report totally random gaps every time

Re: Mega-CD / Sega Saturn dumping

Gap detection with EAC can be a pain.. I don't know if Sega discs really have 1.74 gaps, but PSX discs certainly do not.

18 (edited by p_star 2007-10-03 15:33:16)

Re: Mega-CD / Sega Saturn dumping

Vigi wrote:

I hope p_star can explain why he mentions +1700 instead of +1699?

Oops ... Probably I was drunk.
Sorry... Correct EAC offset is +1699

Vigi wrote:

I don't know if Sega discs really have 1.74 gaps, but PSX discs certainly do not.

It is feature only the Japanese disks for Saturn and Sega CD. Some disks have various gaps(http://forum.psxdb.com/viewtopic.php?id=1188). Someone have all gaps equal 1.74 sec. I think that it is a mistake at record, instead of the mistake in EAC.There are things  specifying that at record of disks mistakes were supposed. For example, in Enemy Zero for Saturn the audiotrack on first three disks was initially identical, but because of a mistake at record it began to differ. http://forum.psxdb.com/viewtopic.php?id=863.

Do not forget and about base Tosec. The Japanese games there everywhere have gaps equal 1.74. For example http://toseciso.org/details.php?id=3109
Certainly silly completely to trust this base, but always it is useful to compare the disks to their "dumps".

Re: Mega-CD / Sega Saturn dumping

gigadeath wrote:

while the other drive reports

2:00
1.74
1.74

etc. all 1.74 after that

This is with gap detection method A, the other methods report totally random gaps every time

Your case pregap it is equal 2.00 sec, and gaps between audio tracks are equal 1.74.

Re: Mega-CD / Sega Saturn dumping

Since I have a couple days of free time, would it be possible to get a beta copy of PerfectRip to test it with my discs? I already talked to Vigilante @ No-Intro site, but I can't use MSN, so I couldn't contact Ipse Dixit and talk to him about it.

Anyone have a copy of PerfectRip? It would be strictly for personal use of course, no distribution whatsoever. If not possible, can anyone contact Ipse Dixit for me and explain my case? Thanks

Re: Mega-CD / Sega Saturn dumping

Please check your mail.

Re: Mega-CD / Sega Saturn dumping

hello, gigadeath! i hope to get some of games you listed somewhere next week.

Re: Mega-CD / Sega Saturn dumping

That's great, it would be good to have other dumps to compare!

In the meantime I tried dumped with PerfectRip with no success. PerfectRip gives me various errors on both drives, things like "injected sub between track 1 and 2", and I can't complete the dumping process with either drive. The drives (one is LG and one is Philips) are not old and in good condition, I never had a problem with EAC, so I'll stick with the IsoBuster/EAC combo.

The discs are uber-mint so the problem is that PerfectRip doesn't go along well with my drives.

Re: Mega-CD / Sega Saturn dumping

hi!
and sorry for long delay.

i just got Tenkafubu/Jikocyushunha2/Sangokishi III from your list and Winning Post couple of hours ago
and so far i only had time to look at Tenkafubu
eac gives gap 2 for 1st audio and 1.74 for the rest
but strange thing is, on every drive, isobuster gives different absolute offset!?
1803/627/1799
i would think it's my mistake to do calc in hurry but this difference is visible even when reading 1st audio by relative ones.
tho it's possible to get crcs to mach if one offset is taken as default and the others adjusted by data difference in dumped tracks.
if for example 1st audio track's, 1st data byte is 5e08e, crc32 : 7a802c1a

sorry it's not much and this is all for now
...didn't had that much time, but i'll try to spend more on this in the next few days

Re: Mega-CD / Sega Saturn dumping

themabus wrote:

but strange thing is, on every drive, isobuster gives different absolute offset!?
1803/627/1799

Do you mean the amount of descrambled data (garbage)? It should be different on every drive, this is the value you should use in EAC. To get disc write offset, simply subtract drive offset value from the amount of descrambled data.