Sonic 2 & Knuckles not working

[zakkman]

I have a EverDrive-MD deluxe model and I cannot get Sonic 2 & Knuckles to run, anyone have any suggestions?

[Cyantist]

Which Romset are you using? e.g. (U) (E) or (J) it might also be a good idea to post a link to the rom you're using.

[sdekaar]

yeah black screen with the classic (W) of this game.
use the version "sonic and knuckles & sonic 2(w) [F1]"

[Lum]

Maybe try [!] instead of [F1] if you can find it.

Aren't Sonic 2 and Sonic & Knuckles both (W) games? I thought any region combo of original carts, should get the same checksum when locked on then dumped into roms.

[Eke]

Try to disable SRAM in Everdrive settings (though I'm not sure if it's still possible with later OS)


Technically: S&K software will trigger the !TIME signal on cartridge port to enable the additional ROM chip present on the original cartridge when it detects Sonic 2 on the lock-on port. The merged ROM already includes this additional ROM part (it's basically S&K+S2+extra ROM concatenated to reproduce the same memory layout as original S&K cartridge with Sonic 2 cart locked in and extra ROM chip enabled) but the !TIME signal is still triggered by the original game and Everdrive might misunderstand this for SRAM activation, as it is generally used on that purpose. This would make the game read inexistant SRAM data instead of Sonic 2 data...