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krick
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Re: MAME 0.145u1
02/20/12 05:36 PM


> do I really need to update my current CHD files ?

I don't know why anyone would update all their samples or CHD files for a "u" version. From my understanding, "u" releases are like development snapshots between major releases. It's entirely possible that this new 7-zip and FLAC stuff may change before MAME 0.146 is released.

Though, I guess someone has to be the guinea pig to try this stuff out and find bugs before the next release, so carry on.


> also, I used chdman to update the file and it got bigger... I thought this new header
> version would make CHD files smaller.

My understanding is that there is a tiny amount of overhead to store the information about what compression algorithm to use for each block, however that should be negated by the higher compression ratios of the new algorithms. I guess it's possible, but not likely, that the best compression algorithm for each block ends up being "zip" (like in the v4 CHD) and the overhead makes the file larger.

Someone should convert ALL the CHDs and post a list of before/after sizes.


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Entire thread
Subject Posted by Posted on
* MAME 0.145u1 redk9258 02/19/12 06:23 PM
. * Re: MAME 0.145u1 kevenz  02/28/12 05:23 AM
. * Re: MAME 0.145u1 B2K24  02/28/12 06:29 AM
. * Re: MAME 0.145u1 CiroConsentino  02/22/12 04:20 PM
. * Re: MAME 0.145u1 etabeta  02/22/12 07:31 PM
. * Re: MAME 0.145u1 CiroConsentino  02/22/12 08:49 PM
. * Re: MAME 0.145u1 Doosh  02/20/12 09:20 PM
. * Re: MAME 0.145u1 AaronGiles  02/20/12 09:29 PM
. * Re: MAME 0.145u1 Llaffer  02/22/12 12:32 AM
. * Re: MAME 0.145u1 B2K24  02/22/12 02:23 AM
. * Re: MAME 0.145u1 Anonymous  02/20/12 10:48 PM
. * Re: MAME 0.145u1 etabeta  02/20/12 09:24 PM
. * Are the CHD changes safe or is it recommended to wait? Pr3tty F1y  02/20/12 07:51 PM
. * Re: Are the CHD changes safe or is it recommended to wait? etabeta  02/20/12 07:59 PM
. * Re: Are the CHD changes safe or is it recommended to wait? krick  02/21/12 04:53 AM
. * Re: Are the CHD changes safe or is it recommended to wait? etabeta  02/21/12 12:00 PM
. * Re: Are the CHD changes safe or is it recommended to wait? R. Belmont  02/21/12 09:57 PM
. * current chdman state... etabeta  02/22/12 10:57 AM
. * Re: current chdman state... R. Belmont  02/22/12 09:41 PM
. * Re: current chdman state... SmitdoggAdministrator  02/22/12 10:11 PM
. * Re: current chdman state... B2K24  02/22/12 10:35 PM
. * Re: current chdman state... SmitdoggAdministrator  02/22/12 10:37 PM
. * Re: current chdman state... Naoki  02/23/12 12:43 AM
. * Re: current chdman state... SmitdoggAdministrator  02/23/12 12:45 AM
. * Re: current chdman state... Naoki  02/23/12 02:10 AM
. * Re: Are the CHD changes safe or is it recommended to wait? BIOS-D  02/21/12 05:25 AM
. * Re: Are the CHD changes safe or is it recommended to wait? R. Belmont  02/21/12 11:03 PM
. * Re: Are the CHD changes safe or is it recommended to wait? Pr3tty F1y  02/21/12 11:56 PM
. * Re: Are the CHD changes safe or is it recommended to wait? CiroConsentino  02/22/12 01:18 AM
. * Re: MAME 0.145u1 CiroConsentino  02/20/12 01:35 PM
. * Re: MAME 0.145u1 krick  02/20/12 05:36 PM
. * Re: MAME 0.145u1 Sune  02/20/12 06:08 PM
. * Re: MAME 0.145u1 TafoidAdministrator  02/20/12 05:43 PM
. * Re: MAME 0.145u1 etabeta  02/20/12 01:39 PM
. * Re: MAME 0.145u1 CiroConsentino  02/20/12 06:01 PM
. * chd update trouble Sune  02/20/12 04:05 AM
. * Re: chd update trouble xibic  02/20/12 02:00 PM
. * Re: chd update trouble Sune  02/20/12 02:43 PM
. * Re: chd update trouble etabeta  02/20/12 02:53 PM
. * Re: chd update trouble Sune  02/20/12 03:31 PM
. * Re: chd update trouble redk9258  02/20/12 04:46 AM
. * Re: MAME 0.145u1 CiroConsentino  02/20/12 01:05 AM
. * CHDMAN Naoki  02/19/12 10:20 PM
. * CHDs inside ZIPs is missing... MASH  02/19/12 10:41 PM
. * Re: CHDs inside ZIPs is missing... redk9258  02/19/12 11:22 PM
. * Re: Test it! MASH  02/19/12 11:32 PM
. * Re: Test it! Naoki  02/20/12 12:32 AM
. * MAME_0.145u1b_32-bit... redk9258  02/19/12 08:36 PM
. * Re: MAME_0.145u1b_32-bit... KingTut  02/19/12 08:58 PM
. * MAME_0.145u1b_64-bit... redk9258  02/19/12 08:27 PM
. * Re: MAME_0.145u1b_64-bit... Dullaron  02/21/12 03:50 AM
. * Re: MAME_0.145u1b_64-bit... redk9258  02/21/12 04:06 AM
. * Re: MAME_0.145u1b_64-bit... CiroConsentino  02/20/12 12:31 PM
. * Thank You (nt) Trebor  02/20/12 05:14 AM
. * Re: MAME 0.145u1 belegdol  02/19/12 08:13 PM
. * Re: MAME 0.145u1 Cyberzinho Punk  02/19/12 08:16 PM
. * Re: MAME 0.145u1 R. Belmont  02/19/12 10:51 PM
. * Re: MAME 0.145u1 belegdol  02/19/12 06:43 PM
. * Re: MAME 0.145u1 redk9258  02/19/12 07:06 PM
. * Re: MAME 0.145u1 Kale  02/19/12 07:30 PM
. * Re: MAME 0.145u1 redk9258  02/19/12 07:38 PM
. * Re: MAME 0.145u1 Kale  02/19/12 07:44 PM
. * Re: MAME 0.145u1 StevieWunderful  02/19/12 11:51 PM

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