Capcom Fighting Collection 2: STREET FIGHTER ZERO 3 Upper -> sega naomi P O R T !!!

[HDemon]

Hi everyone!


I just want to announce that I'm working on porting Street Fighter Zero 3 from the Capcom Fighting Collection 2 back to the SEGA NAOMI arcade system!


Basically, the CFC2 ROM is a heavily reorganized NAOMI ROM, but with enough time and patience, it can be reworked. After a few intense days of HEX editing, comparisons, and making ChatGPT my new best friend, the game now boots, plays the intro, and runs the attract mode!


Right now, the character select screen works, but the game freezes a few seconds in—although if you're quick, you can select a character and reach the first round. There's no sound yet, but honestly, who cares when the best part is: THERE IS NO INPUT LAG! 😄


Yes, you heard that right—no input lag! It's already noticeable on the character select screen, which makes me super happy and excited.


I'll upload a patch for the current state of the game soon. If you like this project and want to support me, here's the link:
👉 Donate via PayPal

 

[eliotcole]

Might it be easier to do something with DC 'Upper'?
Or am I wildly off base?

 

[HDemon]

Might it be easier to do something with DC 'Upper'?
Or am I wildly off base?

This is upper. I don't know how is the DC version but Nomi Arcade version have an awful input lag and because of that it was avoided. Capcom Fighting Collection 2 fixed this.

 

[HDemon]

IPS patch created with Floating IPS v198 https://github.com/Alcaro/Flips/releases/tag/v198 Use on street_fighter_zero_3_upper.dat Sega Naomi ROM. Game Boots about 10 second after NAOMI boot logo so be patients! Thank you!

 

[chris2922]

“After a few intense days of HEX editing”… 🤣 I could spend the rest of the year doing this and get nowhere. I’m impressed you’ve made progress like this in such a small amount of time. Well done, interesting project.

 

[HDemon]

“After a few intense days of HEX editing”… 🤣 I could spend the rest of the year doing this and get nowhere. I’m impressed you’ve made progress like this in such a small amount of time. Well done, interesting project.

Thank you!

 

[HDemon]

Is here someone who could test it on real hardware? I test it in Retroarch and I don't know why but INPUT LAG is still there :/ Im really confused now because before it felt snap. Could this be the emulator? I have game playable at this point but no sound. ROM is build in 98% of CFC2 ROM Data. I only used Header from Naomi ROM to make game bootable. There is still some New Data left I didn't ported yet but I doubt it will fix this. I start thinking that the input lag improvement magic happens in CAPCOMS custom emulator that handles the game but that makes the question Why the ROM have so much changed data? Anyway, it needs to be tested on real hardware now.

 

[HDemon]

BIG UPDATE: I took different approach on the project. Instead of building new ROM form the scratch using CFC2 Data I decided to port changes over to the street_fighter_zero_3_upper.dat Naomi ROM. I ported 82% of changes found in CFC2 and game plays with no issues including sound! But it needs testing on real hardware. I ported only 82% because of 23 files with differences there are 4 files with completely new Data which I have no idea where to put at the moment. I will spit out a patch later so please test and let me know what are your feelings about INPUT LAG because of spending serval hour with the game Im having hard time telling differences. Thank you!

 

[HDemon]

IPS patch created with Floating IPS v198 https://github.com/Alcaro/Flips/releases/tag/v198 Use on street_fighter_zero_3_upper.dat Sega Naomi ROM. This is not final version! Please report any issues! Thank you!

 

[eliotcole]

Can we test it with a piforce or whatever?

 

[HDemon]

Can we test it with a piforce or whatever?

If it lets you play ROMs on your Naomi I think it will be ok.