Just Breed Translation Problems

Started by famiac, November 21, 2015, 05:16:38 pm

Previous topic - Next topic

famiac

Hi guys,

I tried to make a translated Just Breed cart, but i'm not getting any response from the famicom.
If i hit reset, i get some glitchiness but that's it.

Here's the pcb:


Has anyone experienced something like this?

jensma

Hey there!

Seems like you wired the CHR wrong. It should be wired just like the PRG:

EKROM (mapper 5):
PRG AND CHR:
Bend up pin 1, 2, 24, 30 and 31
Solder pin 1 to hole 30
Solder pin 2 to 24
Solder pin 24 to hole 31
Solder pin 30 to hole 1
Solder pin 31 to hole 2


It should look like this:
http://jensma.de/upload/files/Nsr5RF3seQlmpTvQpXUL6.jpg
http://jensma.de/upload/files/72IvGSWDPwnIq5UBgEUc5.jpg

I just did the translation a few days ago :D
(Battery not jet soldered in on the pictures)

Good luck fixing it!

19rsn007

check all connections on the eprom.

I did a repro a few days ago and found it not working as well.
Turned out I had 2 legs not connected on the PRG side and 1 on the CHR side.

fixed the connections and now it's working fine :)

famiac

I checked all connections with a multimeter.

Huh, maybe the pinout on NESdev is wrong? I was going by the datasheet.

I'll wire it as you suggested jensma. Thanks

jensma

No problem, you're welcome.

Looks like you lifted just one extra pin of your CHR, should be a quick fix  ;D

HVC-Man

If the game isn't booting, the only chip you need to look at is the PRG ROM. The Famicom PPU doesn't need a working CHR ROM to boot.

Here's my wiring instructions:

MMC5 (mapper 5):
PRG socket:
Bend up pins 1, 2, 24, 30 and 31
Solder Pin 1 to Hole 30 (A19) (only for 27C801)
Solder pin 2 to hole 24 (A16)
Solder pin 24 to hole 31 (/CE)
Solder pin 30 to hole 1 (A17)
Solder pin 31 to hole 2 (A18) (only for 27C040)
CHR socket:
bend up pins 1, 2, 22, 24, 30 and 31
Solder Pin 1 to Hole 30 (A19) (only for 27C801)
Solder pin 2 to hole 24 (A16)
Solder pin 22 to hole 31 (/CE)
Solder pin 24 to hole 22 (A13)
Solder pin 30 to hole 1 (A17)
Solder pin 31 to hole 2 (A18) (only for 27C040)

jensma

Ah, I somehow read that the game starts but has glitched graphics, my bad :(

famiac

December 04, 2015, 09:24:05 pm #7 Last Edit: December 04, 2015, 09:34:50 pm by famiac
Thanks HVC-Man.

I was following incorrect instructions based on an old nesdev thread.

My pin 24 on the PRG rom was soldered to ground, not /CE
My pin 24 on CHR was soldered to hole 2, not hole 22.

It's now working properly!

Edit:
Are there 2 different title screens?
I just put the cart back together and now i'm getting a title screen that looks like plain text.

Edit 2:
I think the title screen changes when you delete the save files.

xIceMan

I wired CHR and PRG for other MMC5 games (Zelda: Legend of Link for example) the same way jensma said and it works great.

I'm not even sure you need to lift pin 22 of CHR.

FrankWDoom

Pin 1 is needed for 8 mibt roms only. For just breed you can lift that pin and leave it unconnected to save yourself a step.

jake74

Hi all, sorry to resurrect a thread, but I'm having issues making a Just Breed translation with M27C1001 eproms.

I've tried following the listed pinouts on this page, and from several other places online, but cannot get the game working. I get a garbled screen, or solid colours with bits of flashes (screen pic attached)

Has anyone had success with M27C1001 chips and the MMC5 in Just Breed?

Any help appreciated.

L___E___T

 



Jake!  I didn't know you were a member here, sent you a PM, I think I can help.
My for Sale / Trade thread
http://www.famicomworld.com/forum/index.php?topic=9423.msg133828#msg133828
大事なのは、オチに至るまでの積み重ねなのです。

jake74

Quote from: L___E___T on November 24, 2017, 03:24:36 am
Jake!  I didn't know you were a member here, sent you a PM, I think I can help.


Cheers matey!