Page 3 of 3
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Tue Aug 13, 2013 11:15 pm
by qwertymodo
First of all, start with a headerless ROM and use the patch I linked a few posts back. The swapped binary shouldn't work in the emulator because you've scrambled the data. Other than that, it sounds like you've done everything right. Maybe the ROMs are in the wrong sockets?
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Tue Aug 13, 2013 11:37 pm
by muckyfingers
aupton wrote:Hello, I know this is an old thread, but I too am attempting the same, I'm trying to build a Zelda Parallel Worlds cart using an NBA Live '95 cart and 2x27c801 eproms. I've done the following and have been unsuccessful. Any help would be sincerely appreciated. I am trying to do this to learn and for my own personal enjoyment.
Patched parallel*.smc and confirmed that it was working in snes9x.
Swapbin/split for 27c801 using snesROMUtil from Wasabi.
mirrored the 2nd rom file via copy /b 2.bin 2.bin 2-mirror.bin
Confirmed that both 1.bin and 2-mirror.bin are both 1MB.
Tried the swapped bin 1.bin in Snes9x, didn't work, is it supposed to ?
wrote both 1.bin and 2-mirror.bin to individual 27c801 chips and verified.
Removed existing chips from nba live 95, socketed in test sockets to make testing easier while soldering pin24 to pin31 and pin31 to pin24. on *BOTH* sockets.
Inserted both chips, using 1.bin on the bottom socket and 2-mirror.bin on the top socket.
Tested and sadly met with a black screen.
Confirmed all solder points were good, no bleeding connections...
Any thoughts or suggestions ?
Thank you.
1. Patch your file and confirm working in emulator
2. Strip header (if needed) using swap bin
3. Use Lunar Expand to make it 16mb (2MB)
http://fusoya.eludevisibility.org/le/
4. Use swap bin to swap bin the file
5. Burn the files to eproms
6. Solder said eproms to your donor board accordingly
I haven't done one of these in quite awhile so I forget which eprom goes where.
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Wed Aug 14, 2013 11:11 pm
by aupton
@ qwertymodo , @muckyfingers, Thank you both, I got it working! I regenerated the patched source rom using Lunar Expand prior to splitting the rom instead of using the copy method and that sorted it out, the game boots now! Most appreciated!
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Tue Sep 03, 2013 7:18 pm
by jedibrents
I too have been trying to make this cartridge. This is the only place I found where I could possibly get some answers to what's going on with the Zelda Parallel World cart I made. I hope someone can help me out here.
I tested the rom in snes9x, found no title issues there, and successfully burned the two eproms. I got everything soldered in and the game boots up showing "Euclid Presents" followed by music playing and just a blank screen.
Does anyone know what I could have possibly did wrong? I couldn't find information on which rom should be place where. I assumed the bin 1 rom would be closer to the pins to connect to the system, maybe I am wrong?
Any help would be much appreciated. Thanks.
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Tue Sep 03, 2013 7:35 pm
by aupton
Did you make the patched rom 2.0MB before you split it? If you only wrote 1.0MB to one chip and 512Kb to the other, then you may experience problems like this.
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Tue Sep 03, 2013 8:09 pm
by jedibrents
aupton wrote:Did you make the patched rom 2.0MB before you split it? If you only wrote 1.0MB to one chip and 512Kb to the other, then you may experience problems like this.
Yes, I did that. The bin files are both 1024KB. Actually I just about to go to bed and figured let me try it again. It worked, went to the title screen and I was able to create a profile. However, when I went to enter the game it crashed to blank screen. I rebooted and the profile was gone, although that may not matter because I did not replace the battery yet.
Edit: Ok, again I just tried it and now it went past and started the game. I am going to leave it alone for tonight and try it out again tomorrow. I don't know what could be causing this? Is this unusual?
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Tue Sep 03, 2013 8:56 pm
by qwertymodo
An intermittent issue like that sounds like a bad solder joint or a dirty cart edge contact. If the ROMs were switched, it wouldn't boot at all.
Re: Need Help With Zelda Parallel Worlds Cartridge
Posted: Wed Sep 04, 2013 9:44 am
by jedibrents
qwertymodo wrote:An intermittent issue like that sounds like a bad solder joint or a dirty cart edge contact. If the ROMs were switched, it wouldn't boot at all.
You were right, a circle was less than half missing where a pin comes through. I used a different pcb and it works great now. Thanks, still semi novice to soldering and never did eprom's before.