Zipped MegaCD images?

antibolo
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Zipped MegaCD images?

Unread post by antibolo »

The MegaCD core's README doesn't recommend running from zipped disc images. However it seems to run ok for me so far? Does anyone else do this, or have you had any problems that made you not do it anymore?
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darksakul
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Re: Zipped MegaCD images?

Unread post by darksakul »

This is what I found on the Github.
ZIP is supported but doesn't work due to long positioning time. So DON'T zip the images!
So it looks like to me like having Mega CD isos zipped probability effect the read time of the CD image.
It is my great regret that we live in an age that is proud of machines that think and suspicious of people who try to.
ZigZag
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Re: Zipped MegaCD images?

Unread post by ZigZag »

Might be worth looking into the "squashfs" idea for compression;

viewtopic.php?f=27&t=965
retrorepair
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Re: Zipped MegaCD images?

Unread post by retrorepair »

I'd actually recommend CHD. It's extremely flexible and the compression ratio is fantastic.
ZigZag
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Re: Zipped MegaCD images?

Unread post by ZigZag »

retrorepair wrote: Wed Aug 19, 2020 8:02 am I'd actually recommend CHD. It's extremely flexible and the compression ratio is fantastic.
But is CHD supported? Squashfs is already usable with the custom build linked above.
Shaneus
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Re: Zipped MegaCD images?

Unread post by Shaneus »

CHD requires supporting FLAC for audio, and I have no idea how CD access works within an FPGA, doubtful it could handle decoding any kind of compressed audio. I'd say it's unlikely.
retrorepair
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Re: Zipped MegaCD images?

Unread post by retrorepair »

ZigZag wrote: Wed Aug 19, 2020 9:03 am
retrorepair wrote: Wed Aug 19, 2020 8:02 am I'd actually recommend CHD. It's extremely flexible and the compression ratio is fantastic.
But is CHD supported? Squashfs is already usable with the custom build linked above.
I didn't know this when I posted that, looks good.
Seb
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Re: Zipped MegaCD images?

Unread post by Seb »

since last update it's no longer possible to use zipped images ( pc engine cd too )
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NegSol
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Re: Zipped MegaCD images?

Unread post by NegSol »

Seb wrote: Sat Nov 14, 2020 2:55 pm since last update it's no longer possible to use zipped images ( pc engine cd too )
AFAIK cd images never worked when zipped. :?
fraggore@sky.com
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Re: Zipped MegaCD images?

Unread post by fraggore@sky.com »

CHD files work fine on mister i use them.
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aberu
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Re: Zipped MegaCD images?

Unread post by aberu »

fraggore@sky.com wrote: Mon Aug 09, 2021 9:29 pm CHD files work fine on mister i use them.
Yup! Back when the user made this post I don't think CHD support was added by zakk yet. :)
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dshadoff
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Re: Zipped MegaCD images?

Unread post by dshadoff »

It was added around Christmastime.
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D3FMOD
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Re: Zipped MegaCD images?

Unread post by D3FMOD »

dshadoff wrote: Tue Aug 10, 2021 1:08 am It was added around Christmastime.
Really?, oh man, i added mi MegaCD collection a month ago and i uncompressed all my CHD's before ftping them to my Mister :lol:

Seriuosly, if something is lacking about all this Mister stuff is documentation for some of the software or advanced functionalities on the cores/menu
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aberu
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Re: Zipped MegaCD images?

Unread post by aberu »

D3FMOD wrote: Fri Aug 20, 2021 4:53 pm
dshadoff wrote: Tue Aug 10, 2021 1:08 am It was added around Christmastime.
Really?, oh man, i added mi MegaCD collection a month ago and i uncompressed all my CHD's before ftping them to my Mister :lol:

Seriuosly, if something is lacking about all this Mister stuff is documentation for some of the software or advanced functionalities on the cores/menu
Partly it's because this is a hobby DIY project. Personally the MiSTer project has helped me learn and grow in my abilities to find my own answers to this stuff, learn how to use git and github in general, learn how to read and understand some code. Look at it as a learning opportunity. It's more than just a game system to me. If you notice stuff like this, update the wiki or the cores' readme for it. Get involved. :)
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