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Thread: CHD files

  1. #1
    Great Puma (Level 12) Sotenga's Avatar
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    Default CHD files

    Who knows exactly what to do to download a working CHD file? I've downloaded a file in five parts and placed them in a folder in my MAME roms directory. What more am I supposed to do?
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    Peach (Level 3)
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    Hi Sotenga,
    Please bear with me as I am posting this from work, and don't have my MAME in front of me, but I believe there is a specific separate folder for your CHD files. They don't go in the ROMS folder.

    Further more, you say it is in several parts.
    Perhaps it is .rar/.par format?

    If so you will need to use winrar or some such program and combine the pieces to make the whole.

    I will confirm all this once I get home and can look at it in person, I'm just going by memory here. But that should maybe help you get going.

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    Great Puma (Level 12) NE146's Avatar
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    I don't even bother.. the majority of the .chd games even when you get them to run end up going around 5fps unless you got a 8+ghz cpu

    Definitely not worth devoting a couple of gigs too imho. x_x

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    Great Puma (Level 12) Sotenga's Avatar
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    Quote Originally Posted by ghsqb
    Hi Sotenga,
    Please bear with me as I am posting this from work, and don't have my MAME in front of me, but I believe there is a specific separate folder for your CHD files. They don't go in the ROMS folder.

    Further more, you say it is in several parts.
    Perhaps it is .rar/.par format?

    If so you will need to use winrar or some such program and combine the pieces to make the whole.

    I will confirm all this once I get home and can look at it in person, I'm just going by memory here. But that should maybe help you get going.
    Thanks.

    There's a WinRar now? Hmm...

    NE146, I got teh gigs. This is seriously a huge computer that I've got.
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    Great Puma (Level 12) NE146's Avatar
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    Quote Originally Posted by Sotenga
    NE146, I got teh gigs. This is seriously a huge computer that I've got.
    So do I.. and I got several CHD's as well But like I said I give up on them and just keep 'em because I got them already. :P

    But like I said, it's PLAYING them that's not even worth it. Have fun trying though

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    Great Puma (Level 12) Sotenga's Avatar
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    ghsqb, a slight problem. I don't see a separate folder for CHD files. x_x

    NE146, now that MAME supports Beatmania, you better believe that it won't be a waste of hard drive.
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    Great Puma (Level 12) NE146's Avatar
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    Quote Originally Posted by Sotenga
    NE146, now that MAME supports Beatmania, you better believe that it won't be a waste of hard drive.
    Try playing it bro :P


    or should I say. plaaa aaa aaaa aaa y y y y y y y iii i i i i iiii ii ii i ngggggg it

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    Kirby (Level 13) zektor's Avatar
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    Quote Originally Posted by Sotenga
    ghsqb, a slight problem. I don't see a separate folder for CHD files. x_x

    NE146, now that MAME supports Beatmania, you better believe that it won't be a waste of hard drive.
    The CHD file goes in a folder inside your ROMS folder bearing the same name of that game's rom.

    IE: The romfile for NFL Blitz 99 is called blitz99.zip. the CHD file is called "blitz99.chd" and goes into a folder called "blitz99" inside your roms folder. I hope that made sense

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    Great Puma (Level 12) Sotenga's Avatar
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    It did make sense. For example, I created a folder for Killer Instinct's CHD. The rom is in my rom folder/directory (kinst.zip), the folder for my CHD is in my rom folder/directory (kinst) and the folder has all five .rar files for the CHD (kinst.part#.rar) Where do I go from here? Do I compress the .rar files?
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    Kirby (Level 13) zektor's Avatar
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    Quote Originally Posted by Sotenga
    It did make sense. For example, I created a folder for Killer Instinct's CHD. The rom is in my rom folder/directory (kinst.zip), the folder for my CHD is in my rom folder/directory (kinst) and the folder has all five .rar files for the CHD (kinst.part#.rar) Where do I go from here? Do I compress the .rar files?
    Almost. the CHD has to be unzipped/unrared. Use winrar and unzip the five rar files into one kinst.chd file and put that into the directory.

  11. #11
    drowning in medals Ed Oscuro's Avatar
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    Cool...maybe I'll be able to try out that FMV fighting game (Atari's unreleased Vicious Circle) someday (the one that's still a huge percentage of my MAME directory's bytes...lol)

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    Great Puma (Level 12) Sotenga's Avatar
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    Killer Instinct works! Boo-freaking-yah!!! Thanks to everyone, especially Zektor, for their help! And now, I'm going to try Beatmania! Behold the power of MAME.
    That's it! Next stop: The Junkyard. Population: You!

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    Great Puma (Level 12) Sotenga's Avatar
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    Killer Instinct works! Boo-freaking-yah!!! Thanks to everyone, especially Zektor, for their help! And now, I'm going to try Beatmania! Behold the power of MAME.
    That's it! Next stop: The Junkyard. Population: You!

    My college show: The Spirit of Radio, Tuesdays 8-9 p.m. EST = http://www2.etown.edu/clubs_orgs/wwec/listen.asp

  14. #14
    Pear (Level 6)
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    hope you guys enjoying your CHD's on real arcade hardware.. nothing like it !

    also.. check out the newgroups.. lots of new CHD's for future mame! (e.g. wayne gretzky CHD!)

  15. #15
    Pear (Level 6)
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    hope you guys enjoying your CHD's on real arcade hardware.. nothing like it !

    also.. check out the newgroups.. lots of new CHD's for future mame! (e.g. wayne gretzky CHD!)

  16. #16
    Kirby (Level 13) zektor's Avatar
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    Quote Originally Posted by leonk
    hope you guys enjoying your CHD's on real arcade hardware.. nothing like it !

    also.. check out the newgroups.. lots of new CHD's for future mame! (e.g. wayne gretzky CHD!)
    This is actually something these CHD files are excellent for. Say you have one of these hard disk based machines and the HD dies (which isn't uncommon at all) you can recreate the game data from the CHD file and pop a new HD in your machine. Back up and running again! This is preservation at it's best.

  17. #17
    Kirby (Level 13) zektor's Avatar
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    Quote Originally Posted by leonk
    hope you guys enjoying your CHD's on real arcade hardware.. nothing like it !

    also.. check out the newgroups.. lots of new CHD's for future mame! (e.g. wayne gretzky CHD!)
    This is actually something these CHD files are excellent for. Say you have one of these hard disk based machines and the HD dies (which isn't uncommon at all) you can recreate the game data from the CHD file and pop a new HD in your machine. Back up and running again! This is preservation at it's best.

  18. #18
    Red (Level 21) Jorpho's Avatar
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    Do you not require a specific model of hard drive, or will any old IDE thing do?

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    Kirby (Level 13) zektor's Avatar
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    Quote Originally Posted by Jorpho
    Do you not require a specific model of hard drive, or will any old IDE thing do?
    From what I have been told, this was tested on a few machines with an ordinary IDE HD.

  20. #20
    Insert Coin (Level 0)
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    Quote Originally Posted by zektor
    Quote Originally Posted by leonk
    hope you guys enjoying your CHD's on real arcade hardware.. nothing like it !

    also.. check out the newgroups.. lots of new CHD's for future mame! (e.g. wayne gretzky CHD!)
    This is actually something these CHD files are excellent for. Say you have one of these hard disk based machines and the HD dies (which isn't uncommon at all) you can recreate the game data from the CHD file and pop a new HD in your machine. Back up and running again! This is preservation at it's best.
    [quote="zector'][quote="887788"]I'm a new guy. About CHD's. How and where do i extract the files to in order to make a CHD file? Please e-mail me at luigi_675@yahoo.com

  21. #21
    Insert Coin (Level 0)
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    This is 887788. I'm a new guy over here. Can anyone tell me all of the steps in order to make a CHD file? Please e-mail at luigi_675@yahoo.com

  22. #22
    Jessica's Knight / SOFEL Fanboy InsaneDavid's Avatar
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    Geez, nothing like bumping a 3 year old thread - TWICE. You don't make CHD files, they're an extension for old builds of MAME (I think somewhere around v0.88 they were reformatted) that contained data for games that used harddisk images such as Primal Rage and Beatmania. DP isn't a roms site, go read the MAME FAQs for all the information you need.
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    Let's archive some Tomy Tutor / Tomy Pyuuta stuff! I want high resolution scans of documents and boxes. Have a cartridge or dump not in the archive? - Let me know!


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    ServBot (Level 11) roushimsx's Avatar
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    Quote Originally Posted by InsaneDavid
    Geez, nothing like bumping a 3 year old thread - TWICE. You don't make CHD files, they're an extension for old builds of MAME (I think somewhere around v0.88 they were reformatted) that contained data for games that used harddisk images such as Primal Rage and Beatmania. DP isn't a roms site, go read the MAME FAQs for all the information you need.
    Just a few corrections here...

    a) You can make CHDs, and it's not that hard
    b) They're for more than just Hard Drives. CHD stands for "Compressed Hunks of Data", and the change that you're thinking of is when Aaron got pissed off that someone wrote a CHD compression program that he ended up rewriting the format to be natively compressed (making the Killer Instinct CHD files a shit ton smaller). CHDs can also be used for CDs, which basically stores the disc images in ISO+FLAC format.

    CHD support was hacked into a build of Zinc, IIRC... I'm not huge on playstation-based arcade hardware (except for the as of yet unemulated G-Net ), so I don't pay toooooooo much attention to it

    ...so...yea.

  24. #24
    Great Puma (Level 12) NE146's Avatar
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    But again.. playing 99% of the chd files is useless.. with a few exceptions, the majority just run too slow on even current top-of-the-line hardware.

    They will always be available in the future.. and probably even by then there'd be some changes to them. So I'll just kick back and wait until they're PLAYABLE to even look at them again :P

  25. #25
    drowning in medals Ed Oscuro's Avatar
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    Quote Originally Posted by NE146
    But again.. playing 99% of the chd files is useless.. with a few exceptions, the majority just run too slow on even current top-of-the-line hardware.
    The two I've tried (Violent Circle and Crypt Killer) ran just fine even on my second-newest system...

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