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PostPosted: Sun Mar 11, 2018 4:20 am 
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Joined: Sun Mar 11, 2018 3:57 am
Posts: 4
Hi have been lurking these forums for a few years but now i need help so i figured out i should register and try my luck.

im trying to rewire some of my boards to work whit 32mbit sram games

Board type 1
https://i.imgur.com/hw0iDTy.jpg


Board type 2
https://i.imgur.com/XDZrizI.jpg

i have been looking at tmee old drawing he made in and old thread viewtopic.php?t=11615 here on this forum. so i think i have to add an 74hc139 and a 74hc74 to both of that board types? if some one could help me it would be much appreciated. i could make a free 32mbit sram game for that person and send it. any help would be good. only going to use what i learn for my personal repros not going to sell anything!


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PostPosted: Sun Mar 11, 2018 8:57 am 
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Joined: Sun Mar 11, 2018 3:57 am
Posts: 4
okay what do you guys think of this? power and gnd to 74hc74 and 74hc139 i will steal from the 74hc00. do i need to add some diodes or anything and how much is wrong whit my wiring? :lol: and do have to cut any traces on the board? and yes i will install a new battery :)

https://i.imgur.com/GJJ2zdQ.jpg


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PostPosted: Sun Mar 11, 2018 11:07 am 
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Joined: Sun Mar 11, 2018 3:57 am
Posts: 4
okay i found this tread on a diffrent forum https://www.famicomworld.com/forum/inde ... ic=11748.0
seems i only need one additional circuit i guess thats a 7474 but har to se on thoose pics how everything is wired.


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PostPosted: Mon Mar 12, 2018 3:37 am 
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Joined: Sat Jul 04, 2015 9:58 am
Posts: 811
Location: -29.794229 -55.795374
Recently, with help of the people here, we've reverse engineered the Sonic 3 PCB in this thread.
I hope it's helpful.
Good luck!


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PostPosted: Mon Mar 12, 2018 6:22 am 
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Joined: Sun Mar 11, 2018 3:57 am
Posts: 4
hi thanks for the the tip but i have already read that tread :) and unfortunaly it did not make me any smarter :(


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