I've started work on this core. Fortunately, it was already in a pretty advanced state before I picked it up, so a lot of the complicated stuff was already done. So far I have controls and the basics of the sprites programmed in, but there is a very long way to go.
There is plenty of high level information about how the system works, so getting it into a usable state should be pretty easy.
Unfortunately I can't find any info about low level things like cycle timing, so for now this will be high level emulation only and lack the real hard core accuracy of NESHawk and AtariHawk.
Right now there is no sound or hit detection, but CPU emulation seems in order and the characters react to the controls, so that's about it for now. Stay tuned!
Update on VS System. Now all but one VS UniSystem games can be played! Contorls are are implemented in EmuHawk and can be used in TASing (although I'm not sure of the TASing potential of any particular game.)
The one notable exception is Hogan's Alley. The game boots and runs correctly, but light gun detection for that game is broken because the palette color appears to be slightly different then expected. I'm not sure if this is a problem of the emulated palette or a weakness in light gun detection emulation, but either way it doesn't work.
Dual System games also don't work, and it's not really obvious how they could be made to work, but maybe I'll work on it someday.
Alyosha, are there any runs that blew your mind?
In my opinion, and I think I can back it up sufficiently, a newcomer rec should first and foremost be newcomer-friendly. Which means they should look and sound good, have intuitive mechanics and the run itself should demonstrate easily discernible level of precision and planning without boring nor alienating the viewer. What is friendly for a pro isn't necessarily friendly for a newcomer. We already have stars for the pros.
I suddenly think Gimmick must be in that list. Though the game is not famous at all, it appears as a TAS gem and it's unique features get abused insanely well. It has a deep and complicated engine and really conduct the sense of TASing the gameplay way.I'd vote for Gimmick to stay. We honestly don't need to throw it away in favor of more Mario. There's nothing wrong with having both co-exist, except for "rules" that hardly anyone agree on in the first place.
I've made some progress on VS System, and now you can play some VS system games on NESHawk.
There is no 'insert coin' feature yet, but you can play in free play mode by setting dipswitches 1,2,3 to '1' in the NES->advanced settings tab, then reboot core.
This is a work in progress, so some games will still be incompatible, but I should be able to make rapid progress and have it pretty well finished by the next release. Right now you can play VS Super Mario Bros and several other games from the dev build.
*NOTE* Controller registers are reversed in VS System, so EMUHawk player 2 is VS System player 1, so make sure you set up player 2's controller. I might end up changing this to normal later but for accuracy right now that's how it works.
The difference is that of one settable register on hardware that is on the cart (8-bit register?), to three specific bits set and all others cleared out of 16384.
The default branch always begins from zeroed out RAM. On a case-by-case basis, "arbitrary starting RAM state" submissions can be accepted to Moons, much as we do with "game end glitch" runs. We never draw a distinction between runs based on the number of bits they flip, unless that number is 0.
My question, entirely unrelated to the setting of RAM beforehand, is why you use abilities with no result early in the run (0:24, 0:35), and why you fire one Bomb too many at around 4:08 - there's nothing in the way, you just launch an extra Bomb into the wall for no apparent reason.