Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
LGN-76

DOOM 64 EX: Help using WadGEN with a DOOM 64 ROM dumped by the Retrode

Recommended Posts

Hey there,

I'm trying to get DOOM 64 EX's WADGen to read and convert the data from a DOOM 64 ROM, that I dumped from my own cartridge using a device called the Retrode.

However, every time I open the ROM with WADGen, it says:
"ERROR: ROM checksum verification failed. Rom is either broken or corrupted."
Even after fixing the checksum with UCON64, WADGen won't read the ROM.

How can I fix this? And no I'm not gonna download the ROM off the Internet illegally.

Share this post


Link to post

Have you tried dumping the cart again? Also, why are you opposed to DLing it if you own it already?

Share this post


Link to post

If it's failing because of a checksum, it means it is comparing to some known rom(s) checksum. The "Retrode" is possibly adding some minor data (or alternatively, the Retrode isn't, but the known-good roms had some bookkeeping metadata type stuff added during their dump). My guess at least!

Share this post


Link to post

If you already got the Cartridge, just go download the ROM from ROMs sites, won't make a difference, it'll just make it easier for you , not sure how legal is this but as long as you're not living in US ...

Nintendo said:

Haven't the Copyrights for Old Games Expired?

U.S. copyright laws state that copyrights owned by corporations are valid for 75 years from the date of first publication. Because video games have been around for less than three decades, the copyrights of all video games will not expire for many decades to come.

Share this post


Link to post

You're better off contacting the people who manufacture the device for specific support on its use I imagine, or a forum dedicated to emulation or rom dumping.

Share this post


Link to post

Uhhh... are you sure this is not related to the extraction utility needing a particular release of the ROM, e.g. US, Japan or Europe? Maybe you have a different revision?

Even if you're not willing to download one or more ROMs for comparison, you may be able to find out about different versions, dumps, compare filesizes and checksums with yours.

Share this post


Link to post

I went ahead and downloaded the ROM and saved myself the trouble. Thanks anyway ;)

Share this post


Link to post

Well, at this point you could repay the courtesy by doing some more in-depth analysis, e.g. what went wrong with your own cart's dump? Can you do a simple binary file comparison? Maybe what you went through has been/will be experienced by other users of the Retrode, so having a user story here would help give back some.

Share this post


Link to post

Just because Wadgen didn't recognise it doesn't mean it was a bad dump. Was it running fine on an emulator?

Share this post


Link to post

That's another good question...what kind of dump does the Retrode generate? Ready-to-use ROM files that every N64 emulator understands? Or some other format which needs some more processing before being used?

Share this post


Link to post

Sorry it took so long to respond, but to answer VGA and Maes, yes the Retrode-dumped ROM does work flawlessly in Project64 (The only N64 emulator I ever use, but I'm sure it'd work in other N64 emulators as well...).

Share this post


Link to post

OK, I realize this is an old thread, but I figured it'd be better to post this question here instead of making a whole new thread:

Would it be possible for me to send my Retrode-dumped Doom 64 rom to whoever created Wadgen via pm or email, so he can analyze it and possibly make Wadgen compatible with Retrode dumps?

Share this post


Link to post
RexFesto696 said:

OK, I realize this is an old thread, but I figured it'd be better to post this question here instead of making a whole new thread:

Would it be possible for me to send my Retrode-dumped Doom 64 rom to whoever created Wadgen via pm or email, so he can analyze it and possibly make Wadgen compatible with Retrode dumps?

The person in question is Kaiser. He might not have enough free time for an update to Doom64 at the moment, but I suppose you can at least PM him with the question.

Share this post


Link to post

This might sound silly, but the only thing I can suggest is if you can PM me the rom and I'll try to verify if its the correct format or not. I have a feeling that this could be a unique format dumped only by Retrode as I am seeing no mention of this in the Project 64 source code.

Share this post


Link to post
Kaiser said:

This might sound silly, but the only thing I can suggest is if you can PM me the rom and I'll try to verify if its the correct format or not. I have a feeling that this could be a unique format dumped only by Retrode as I am seeing no mention of this in the Project 64 source code.

Will do. PM coming your way in a few minutes...

Share this post


Link to post
RexFesto696 said:

Will do. PM coming your way in a few minutes...



You're in luck. Rename the .n64 extension to .z64 and you should be good to go.
Though I could of sworn that wadgen would of recognized that format.

Share this post


Link to post
Kaiser said:

You're in luck. Rename the .n64 extension to .z64 and you should be good to go.
Though I could of sworn that wadgen would of recognized that format.

It worked! Thanks!
Although I should've known the solution was so simple...

Share this post


Link to post

It's surprising (and a bit disappointing) that WadGen depends on the file name to determine the type of ROM.

Share this post


Link to post
chungy said:

It's surprising (and a bit disappointing) that WadGen depends on the file name to determine the type of ROM.

Could probably be rewritten pretty easily to use the same type of format calculation that emulators like Project 64 use. I saw their routine for it, not very complex (just testing byte order in well-known areas such as the header).

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×