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Re: Fixed software lists [Re: R. Belmont] #62113 05/23/10 01:26 AM
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F1ReB4LL Offline
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Originally Posted By R. Belmont
Wouldn't dumping DC discs on a PC instead of the real Sega/Panasonic hardware cause a different track offset compared to the real life hardware?


All the offsets should be compensated while dumping, same for the CD-titles. Those dumps from the real h/w are shifted, yes (and no gaps, IIRC). As I've said already, you can emulate the offset in the emulator itself, but it shouldn't be in the dump.

Re: Fixed software lists [Re: F1ReB4LL] #62114 05/23/10 02:27 AM
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Yes, but if the correct offsets from real h/w are in the dump the emulator doesn't have to do anything to be perfectly accurate smile

Re: Fixed software lists [Re: R. Belmont] #62124 05/23/10 10:06 AM
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And if the decrypted CPS-2/Neo Geo/whatever games are what's inside the PCB after the decrypting process - why to bother with emulating it? Leave everything decryted, the gameplay will be exactly the same. Remember: all these offset issues happen only because all the CD-media dumps are incomplete. You can either try to dump the entire user area from the first byte upto the last or you can just try to dump "some data" using your PC drives, console drives or whatever else. We dump CD and GD medias themselves, not the random console outputs, I don't know what MESS is going to dump, it's on your own.

Re: Fixed software lists [Re: F1ReB4LL] #62125 05/23/10 10:10 AM
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judge Offline
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Originally Posted By F1ReB4LL

Originally Posted By mahlemiut
This will be awesome for FM Towns also, as its BIOS expects the first track to be at 02:00 (the CD controller uses MSF format for disc locations


Hmm? AMSF 00:02:00 equals LBA 0, every disc image starts from that sector, sectors 00:00:00 to 00:01:74 (LBA -150 to -1) contain pregap which is usually omitted, while dumping.


Too bad that those sectors never get dumped: the TOC lives in there. Having those sectors would remove the need of having toc information supplied with a dumped cd.

Re: Fixed software lists [Re: judge] #62126 05/23/10 10:18 AM
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TOC lives waay before those sectors (somewhere around LBA -10000)and each drive has a command to read the TOC in RAW form, so it's not really a problem. TOC is located in the subchannels area, btw, so it's not an easy task to read those "as is" even on the drives that are able to.

Re: Fixed software lists [Re: F1ReB4LL] #62222 05/26/10 07:18 AM
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Back to the main list topic, I just noticed that there is no code to load roms from the parent set.

This would be useful for AES and (especially) for NES whose cart revisions often differ only for PRG or CHR and using split sets like MAME would help

I guess the code should go into image_load_internal in image.c, but I have been unable to find how to implement it.

any suggestions?

Re: Fixed software lists [Re: etabeta78] #62223 05/26/10 01:45 PM
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I think the logic might be identical to the code in romload.c, maybe at some point it might even be possible to use the same code.

Re: Fixed software lists [Re: Firewave] #62228 05/26/10 05:56 PM
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The logic is indeed the same, I just havent gotten around to make the code in romload.c a bit less dependant on the machine driver structure to make it reusable for both machine driver rom loading and software list rom loading.

Re: Fixed software lists [Re: judge] #62248 05/27/10 01:52 PM
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any chance you can make it look for everything in the rom folder as a 'last place to look' fallback while you're at it? eta mentioned he didn't know how to handle that, and it can't be that badly coded that it's impossible I'm sure.

I'd still rather have the choice to simply dump files in the roms folder if I want to rather than messing around putting some in bios folders, creating sub-folders etc. etc.

Re: Fixed software lists [Re: Haze] #62249 05/27/10 02:08 PM
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as a temporary workaround you can either run

mess system -cart C:\place_where_I_threw_my_file\gamename.zip

or name the folder you have dropped your files in as "system" and launch

mess system -cart gamename -rp C:\folder_above_the_folder_with_roms\

it's not pleasant, but it can work if you only want to test one or two files...

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