Genesis 32mbit sram wiring issues.

Discussion of development of software for any "obsolete" computer or video game system. See the WSdev wiki and ObscureDev wiki for more information on certain platforms.
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Afterburner
Posts: 4
Joined: Sun Mar 11, 2018 3:57 am

Genesis 32mbit sram wiring issues.

Post by Afterburner »

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!
Afterburner
Posts: 4
Joined: Sun Mar 11, 2018 3:57 am

Re: Genesis 32mbit sram wiring issues.

Post by Afterburner »

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
Afterburner
Posts: 4
Joined: Sun Mar 11, 2018 3:57 am

Re: Genesis 32mbit sram wiring issues.

Post by Afterburner »

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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Fisher
Posts: 1249
Joined: Sat Jul 04, 2015 9:58 am
Location: -29.794229 -55.795374

Re: Genesis 32mbit sram wiring issues.

Post by Fisher »

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!
Afterburner
Posts: 4
Joined: Sun Mar 11, 2018 3:57 am

Re: Genesis 32mbit sram wiring issues.

Post by Afterburner »

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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