RockNES 5.66 -April 9th 2021-

Discuss emulation of the Nintendo Entertainment System and Famicom.

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Zepper
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Re: RockNES 5.66 -April 9th 2021-

Post by Zepper »

lidnariq wrote: Fri Apr 09, 2021 2:21 pm The Vs. System is not the same hardware as the NES, and you shouldn't have $4016 and $4017 behaves the same for both.

It is absolutely correct that if you put Vs. SMB on a NES cart it would perceive the coin drop as continuously activated.
The best words would be... "Improve your mapper 99 emulation".
It's not the same "hardware set" I'd say.
Pokun
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Re: RockNES 5.66 -April 9th 2021-

Post by Pokun »

lidnariq wrote: Fri Apr 09, 2021 5:02 pm
Pokun wrote: Fri Apr 09, 2021 4:36 pm 2. You mean like use its mapper emulation to intercept $4016/$4017 access kind of like a Game Genie? Or patch the ROM on the fly? The Everdrive does have mapper 99 listed so maybe it does something hacky with these games. I have no idea if mapper 99 was listed years ago when I tried VS SMB though.
No, no patching.

I mean that in the same way VRC2 and mapper 150 have 1 or 3-bit wide readable registers and the rest is open bus, it's possible for a flashcart to make only the top three bits of reads from $4016 and $4017 become not open bus without inducing a bus conflict on the lower five bits
I see.
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