It is currently Tue Dec 12, 2017 10:37 pm

All times are UTC - 7 hours



Forum rules


1. NO BLATANT PIRACY. This includes reproducing homebrew less than 10 years old, with the exception of free software.
2. No advertising your reproductions, with the exception of free software.
3. Be nice. See RFC 1855 if you aren't sure what this means.



Post new topic Reply to topic  [ 5 posts ] 
Author Message
PostPosted: Fri Jan 15, 2016 5:51 pm 
Offline

Joined: Fri Jan 15, 2016 5:31 pm
Posts: 3
Hi I have a Japanese copy of chronic trigger that I would like to convert to USA copy.
I am trying to use this diagram
viewtopic.php?f=12&t=4877&start=45

I already have the parts but I am a little confused with the pinout.
It says that pin 2 of the 74ls139 is wired to A0 of the snes maskrom
Eepron A0 to snes pin 13
Eeprom A1 to snes pin 12
Eeprom A2 to snes pin 11
Eeprom A3 to snes pin 10
Eeprom A4 to snes pin 9
Eeprom A5 to snes pin 8
Eeprom A6 to snes pin7
Eeprom A7 to snes pin 6 but on the snes pinout pin 6 is supoused to be pin 12
That's where I am stuck any help would be appreciated.


Top
 Profile  
 
PostPosted: Sat Jan 16, 2016 8:46 am 
Offline

Joined: Fri Jan 15, 2016 5:31 pm
Posts: 3
Anyone?
Or does anybody have a different schematic?


Top
 Profile  
 
PostPosted: Sat Jan 16, 2016 1:47 pm 
Offline

Joined: Mon Jul 02, 2012 7:46 am
Posts: 760
Pick a different EEPROM, using a 16-bit ROM for an 8-bit cart is going to be an unnecessary pain in the butt.


Top
 Profile  
 
PostPosted: Sun Jan 17, 2016 2:42 am 
Offline

Joined: Fri Jul 04, 2014 2:34 pm
Posts: 296
Location: Germany
Yes, that method is old but I've attached something that should help you.


Attachments:
27c322 + makrom pinout.jpg
27c322 + makrom pinout.jpg [ 124.54 KiB | Viewed 1103 times ]
Top
 Profile  
 
PostPosted: Sun Jan 17, 2016 2:41 pm 
Offline

Joined: Fri Jan 15, 2016 5:31 pm
Posts: 3
Thanks guys.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group