Change RAM, CRAM from addon

For anything related to cart (SRAM, SF2 mapper, audio, CD mode 1, ...)

Moderator: BigEvilCorporation

Post Reply
cloudstrifer
Very interested
Posts: 118
Joined: Mon Feb 19, 2018 7:31 pm

Change RAM, CRAM from addon

Post by cloudstrifer » Wed Sep 22, 2021 2:41 pm

Hi, I like to know if there is some way to change RAM, CRAM and execute complex functions through addon on Sega Genesis. ​

My initial project will be a cheat device, someone can help me?

TmEE co.(TM)
Very interested
Posts: 2440
Joined: Tue Dec 05, 2006 1:37 pm
Location: Estonia, Rapla City
Contact:

Re: Change RAM, CRAM from addon

Post by TmEE co.(TM) » Thu Sep 23, 2021 1:22 am

Cartslot is slave only with no means to do bus mastering (it cannot initiate writes to the console, only receive them) so you'll need software help. One way is to hijack frame interrupt, do your thing in it and then run the original handler, but it might break timing sensitive games.
Mida sa loed ? Nagunii aru ei saa ;)
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

Miquel
Very interested
Posts: 514
Joined: Sat Jul 30, 2016 12:33 am

Re: Change RAM, CRAM from addon

Post by Miquel » Thu Sep 23, 2021 7:31 pm

Taking ownership of an exception and execute a program is my first thought.

I believe Everdrive does save states... some spying work there maybe...
HELP. Spanish TVs are brain washing people to be hostile to me.

Post Reply