gba unzip and snes prototype games

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777gamer
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Joined: 19 Nov 2015 03:05

gba unzip and snes prototype games

Post by 777gamer » 27 Nov 2015 20:51

there are prototype snes games with bad checksums for what reason is this?

also i downloaded the gba romset and the emulator dont read them when they are ziped but you have to uzip them and here comes the problem the roms size to much is ridiculous
there is some solution? i have a 80gb disc and it fill it all

Hiccup
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Re: gba unzip and snes prototype games

Post by Hiccup » 28 Nov 2015 11:01

1. For preservation, I guess?
2. Other than getting bigger/another storage, you could a) get an emulator that can open ROMs in zips b) set up a script of some kind to unzip+open contained ROM in emulator on any given zip c) extract the ROMs then compress them into a file type that the emulator can read.

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C. V. Reynolds
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Re: gba unzip and snes prototype games

Post by C. V. Reynolds » 30 Nov 2015 08:26

If SNES protos and betas have bad checksums, it is usually because the programmers had yet to fix the checksum at the time of compile. They were still actively changing the game, and that would break the checksum constantly. Hence, they waited until the game was otherwise finalized before correcting the checksum.

As for your second question, the real solution is to get a second hard drive or just a bigger one. That or don't try to hold onto every ROM image. You could question whether you need to hoard them all. Compressing the files helps a lot, but if you're having disk space issues, nothing comes close to the efficiency of just getting a new drive. My current drive (after my 10-year-old computer died last month... sniff) is a three terabyte Seagate HDD and it only cost 85 dollars. That's a lot of money for an unsuccessful fellow like me, but I definitely enjoy not having to worry about disk space. Well worth it.

Also, the best GBA emulator is mGBA. It loads games from ZIP files and 7z files. Making your files 7z files can save a LOT of space.

badinsults
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Joined: 05 Jun 2008 01:34

Re: gba unzip and snes prototype games

Post by badinsults » 03 Dec 2015 02:04

The internal header checksum is purely there to satisfy Nintendo's publishing requirements. The fact that it is wrong in the prototypes really has no bearing on whether or not the dump is good (and I believe there are a couple of commercial releases where the checksum is bad).

777gamer
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Joined: 19 Nov 2015 03:05

Re: gba unzip and snes prototype games

Post by 777gamer » 03 Dec 2015 23:17

C. V. Reynolds wrote:If SNES protos and betas have bad checksums, it is usually because the programmers had yet to fix the checksum at the time of compile. They were still actively changing the game, and that would break the checksum constantly. Hence, they waited until the game was otherwise finalized before correcting the checksum.

As for your second question, the real solution is to get a second hard drive or just a bigger one. That or don't try to hold onto every ROM image. You could question whether you need to hoard them all. Compressing the files helps a lot, but if you're having disk space issues, nothing comes close to the efficiency of just getting a new drive. My current drive (after my 10-year-old computer died last month... sniff) is a three terabyte Seagate HDD and it only cost 85 dollars. That's a lot of money for an unsuccessful fellow like me, but I definitely enjoy not having to worry about disk space. Well worth it.

Also, the best GBA emulator is mGBA. It loads games from ZIP files and 7z files. Making your files 7z files can save a LOT of space.
and for the betas whit bad checksum is the same case to or something like it?

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alcoatjez
Posts: 201
Joined: 26 May 2008 19:29

Re: gba unzip and snes prototype games

Post by alcoatjez » 06 Jan 2016 22:57

777gamer wrote:
C. V. Reynolds wrote:If SNES protos and betas have bad checksums, it is usually because the programmers had yet to fix the checksum at the time of compile. They were still actively changing the game, and that would break the checksum constantly. Hence, they waited until the game was otherwise finalized before correcting the checksum.

As for your second question, the real solution is to get a second hard drive or just a bigger one. That or don't try to hold onto every ROM image. You could question whether you need to hoard them all. Compressing the files helps a lot, but if you're having disk space issues, nothing comes close to the efficiency of just getting a new drive. My current drive (after my 10-year-old computer died last month... sniff) is a three terabyte Seagate HDD and it only cost 85 dollars. That's a lot of money for an unsuccessful fellow like me, but I definitely enjoy not having to worry about disk space. Well worth it.

Also, the best GBA emulator is mGBA. It loads games from ZIP files and 7z files. Making your files 7z files can save a LOT of space.
and for the betas whit bad checksum is the same case to or something like it?
Please read the the reply. The answer is yes.

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