Chism FAT drvier and Dualis r19.1 & 20

[alekmaul]

Hello all,

My emulator MarcaDS works fine with Dualis R19 but freeze on the game list with Dualis R19.1 and Dualis R20... I think the problem is when I open the game rom file to see if a screen shot is available.

I use the last chism driver version : 2006/03/03

Can't with use these dualis versions with this chism's driver ?

Edited April 20, 2006 by alekmaul

[Robert]

I never heard of MarcaDS... turns out it's an arcade emulator that runs on a DS. Nice site too... (in French grr).

[mic]

The only thing regarding FAT that I've changed in those versions is that I increased the limit for number of files and added support for long filenames.

[alekmaul]

I never heard of MarcaDS....

<{POST_SNAPBACK}>

Yes, I am French, sorry about that

MarcaDS is an arcade emulator like Mame but it does not use the mame source code (too huge for DS). So you can play at games like Pacman, Donkey Kong, arkanoid, and so on (the list is in the zip file).

It is emulated about 40 games for now.

You can download the last version, you will have a readme file in Englsh too !

 

For mic, this is very strange... , I have change nothing.

MarcaDS freeze if you use UP and Down keys on the list. I will try do locate the code which is responsible of the problem.

 

[EDIT]I have found where is the problem, it is in my zip reader, but I don't know why it does not works now.

Here is the code :

    if (_zipFile != NULL) {
     free(_zipFile);
   }
   _zipFile = NULL;
   FAT_chdir(szFATDir);
   FAT_FILE* handle = FAT_fopen(path, "r");  
   if (handle != NULL) {
     int iSSize=FAT_GetFileSize();
     _zipFile = (char*) malloc (iSSize+1); 
     FAT_fread((void*) _zipFile, iSSize, 1, handle); 
     FAT_fclose(handle);
   }

path is a const char * var which have the real zip filename.

Edited April 20, 2006 by alekmaul

[mic]

You could try putting printf's in front of each statement in that code to see which exact statement it freezes on.

[alekmaul]

OK, I have put debug mode on.

Here is the screenshot of Dualis before it is crashing (drwatson...)

The FAT_GetFileSize is ok, it is 218142 for 1942.zip arcade game.

So, I think the pb is the FAT_fread, because it crashed just after when I want to check the ZIP header (and the size of the zip file seems ok).

  if (_zipFile != NULL) {
   if ( (*_zipFile != 0x50) || (*(_zipFile + 1) != 0x4B) || (*(_zipFile + 2) != 0x03) || (*(_zipFile + 3) != 0x04) ) {
     if (isFATSystem) {
       free(_zipFile);
     }
#ifdef VERBOSE
     iprintf("Not zip file %08x\n",_zipFile);
#endif
     return 0xF0;
   }

Of course, I have made NO modification to chism's FAT driver.

 

Any suggestion ?

Edited April 21, 2006 by alekmaul

[alekmaul]

Also, even if it will not help you, MarcaDS is compatible with GBFS and it works fine with Dualis R20.

The problem is only with FAT driver.

[mic]

I have fixed a couple of bugs in the FAT emulation today. I don't know if they have anything to do with your problem, since I don't have the latest version of MarcaDS to test with.

[Robert]

http://www.portabledev.com/

 

But I can't seem to find the download section.

[alekmaul]

mic, I've got a bad news for you... ....

 

NOW, IT IS GOOD !!! !!!! Thanks a lot for your fast release with the fix, you're the best

 

Robert, here is the web page about MarcaDS, with download section on the bottom of the page : MarcaDS Web Page

Also, you can find others emulator i've made on my web site, a vectrex emulator and a coleco emulator.

Here are the links :

Coleco Emulator

Vectrex emulator

Also, the PSG emulation of the unreleased V0.3 of colecoDS works fine with sound in Dualis

At least, mic, I saw a little bug in your emulator, the video emulation works even if we access it in 8 bits (for exemple, when we are changing tiles video ram, like in MarcaDS), but it is bad because the hardware only wants 16 bits access. So some homebrew works on your emulator if we make access in 8 bits to the video memory but are not working if we use a real DS (glitchs on screen or black screen).

Edited April 22, 2006 by alekmaul

[Robert]

Thanks Alekmaul <_>