Homebrew JSNES JavaScript NES emulator may be working on switch

Suso_ · Apr 23, 2017

Hey! I've been lurking in the forums for a while, but I decided to make an account now that I need to ask about this.

So I was messing round with the unlocked switch web browser by using the fiddler method to browse anywhere and tried to use JSNES... Surprisingly, it started working (even though it seems necessary to disable sound or else it just drops to 0 fps).

The problem is that controls are obviously prepared to play on PC, so I cant even press the start button to check if it's working. I opened the code to try and change the controls or something... but then I realized I don't know the codes for switch input...

This is the switch for the input (it starts on line 2027 of the code):

Code:

switch (key) {
//Player 1 controls
            case 88: this.state1[this.keys.KEY_A] = value; break;      // X
            case 89: this.state1[this.keys.KEY_B] = value; break;      // Y (Central European keyboard)
            case 90: this.state1[this.keys.KEY_B] = value; break;      // Z
            case 17: this.state1[this.keys.KEY_SELECT] = value; break; // Right Ctrl
            case 13: this.state1[this.keys.KEY_START] = value; break;  // Enter
            case 38: this.state1[this.keys.KEY_UP] = value; break;     // Up
            case 40: this.state1[this.keys.KEY_DOWN] = value; break;   // Down
            case 37: this.state1[this.keys.KEY_LEFT] = value; break;   // Left
            case 39: this.state1[this.keys.KEY_RIGHT] = value; break;  // Right
//Player 2 controls
            case 103: this.state2[this.keys.KEY_A] = value; break;     // Num-7
            case 105: this.state2[this.keys.KEY_B] = value; break;     // Num-9
            case 99: this.state2[this.keys.KEY_SELECT] = value; break; // Num-3
            case 97: this.state2[this.keys.KEY_START] = value; break;  // Num-1
            case 104: this.state2[this.keys.KEY_UP] = value; break;    // Num-8
            case 98: this.state2[this.keys.KEY_DOWN] = value; break;   // Num-2
            case 100: this.state2[this.keys.KEY_LEFT] = value; break;  // Num-4
            case 102: this.state2[this.keys.KEY_RIGHT] = value; break; // Num-6
            default: return true;
        }

Anyone knows what would be the codes for the switch's joycons?

MashedPotatos · Apr 23, 2017

I'm not entirely sure this will work, but try to find the button values of the controls of the joycon and then change KEY_A, KEY_B, etc to what the joycons buttons are for example if you where to port the Xbox one controller to this you would change KEY_UP, KEY_DOWN, KEY_LEFT and KEY_RIGHT to DPAD_UP, DPAD_DOWN, DPAD_LEFT and DPAD_RIGHT

Suso_ · Apr 23, 2017

MashedPotatos said:
I'm not entirely sure this will work, but try to find the button values of the controls of the joycon and then change KEY_A, KEY_B, etc to what the joycons buttons are for example if you where to port the Xbox one controller to this you would change KEY_UP, KEY_DOWN, KEY_LEFT and KEY_RIGHT to DPAD_UP, DPAD_DOWN, DPAD_LEFT and DPAD_RIGHT

I think what we actually need to change are the key variable values that the switch looks for (88, 89, 90, 17, 13, 38, 40, 37 and 39). They seem to represent the keys that match the emulator's controls.

the_randomizer · Apr 23, 2017

Whoa, didn't expect this to be feasible o.O

fedehda · Apr 24, 2017

Awesome. I'll keep an eye on the thread

g00s3y · Apr 24, 2017

Big if true

NSStack · Apr 24, 2017

I'll look more into it on Friday (when I finally get the Switch) if someone doesn't before me. Seems like a fun little side project.

Suso_ · Apr 24, 2017

I figured out a way to find the keycodes we need:

I made this simple test html:

HTML:

<!DOCTYPE html>
<html>

<title>Test KeyCodes</title>

<body>

<p id="output">Key-Keycode</p>

<script>
document.onkeydown = function (e) {
    e = e || window.event;
    var code = e.keyCode;
    document.getElementById("output").innerHTML = document.getElementById("output").innerHTML  + "; " + String.fromCharCode(code) + "-" + code;
};
</script>

</body>

</html>

It gives you the code of every key you press, so I run it on the switch and got these:

A button: 13 = ENTER
B button: Exits the web.
Y button: Doesn't give output.
X button: Exits the web.

D-PAD Left: 37 = %
D-PAD Up: 38 = &
D-PAD Right: 39 = '
D-PAD Down: 40 = (

Sticks: Don't give output, even by pressing them.

L/R/ZL/ZR/SL(L)/SR(L)/SL(R)/SR(R): Don't give output.

+/- buttons: Show information about the page.

Capture button: Doesn't give output.
Home button: Exits to the home menu.

Volume buttons: Don't give output.
ON/OFF button: Starts sleep mode.

I'm going to try and get the emulator's start button working.

anonymoose · Apr 24, 2017

Suso_ said:
[ ... ]

Anyone knows what would be the codes for the switch's joycons?

If it's about joycons, you should ask @shinyquagsire23

NSStack · Apr 24, 2017

anonymoose said:
If it's about joycons, you should ask @shinyquagsire23

Definitely. @shinyquagsire23 has been working on an evdev input driver recently. I'm not sure if he'll have any knowledge for capturing the input in the Switch browser, but it's worth a shot.

Suso_ · Apr 25, 2017

I managed to get it working

It's still unplayable (because it can only get to about 7 fps) but it's definitely something.

anonymoose said:
If it's about joycons, you should ask @shinyquagsire23

NSStack said:
Definitely. @shinyquagsire23 has been working on an evdev input driver recently. I'm not sure if he'll have any knowledge for capturing the input in the Switch browser, but it's worth a shot.

I already got some keyCodes, but I think i should ask @shinyquagsire23 anyways. Maybe he knows how to get the other buttons working...

the_randomizer · Apr 25, 2017

Still a better effort than Nintendo's lack of VC on the Switch.

BL4Z3D247 · Apr 26, 2017

Why not just optimized JSNES to run better on the Switch's browser and then make a designated webpage to host it on?

The source is here...
https://github.com/bfirsh/jsnes/

Nice find regardless. I hope to see this go somewhere.

Deleted User · Apr 28, 2017

Suso_ said:
Hey! I've been lurking in the forums for a while, but I decided to make an account now that I need to ask about this.

So I was messing round with the unlocked switch web browser by using the fiddler method to browse anywhere and tried to use JSNES... Surprisingly, it started working (even though it seems necessary to disable sound or else it just drops to 0 fps).

The problem is that controls are obviously prepared to play on PC, so I cant even press the start button to check if it's working. I opened the code to try and change the controls or something... but then I realized I don't know the codes for switch input...

This is the switch for the input (it starts on line 2027 of the code):

Code:

switch (key) { //Player 1 controls case 88: this.state1[this.keys.KEY_A] = value; break; // X case 89: this.state1[this.keys.KEY_B] = value; break; // Y (Central European keyboard) case 90: this.state1[this.keys.KEY_B] = value; break; // Z case 17: this.state1[this.keys.KEY_SELECT] = value; break; // Right Ctrl case 13: this.state1[this.keys.KEY_START] = value; break; // Enter case 38: this.state1[this.keys.KEY_UP] = value; break; // Up case 40: this.state1[this.keys.KEY_DOWN] = value; break; // Down case 37: this.state1[this.keys.KEY_LEFT] = value; break; // Left case 39: this.state1[this.keys.KEY_RIGHT] = value; break; // Right //Player 2 controls case 103: this.state2[this.keys.KEY_A] = value; break; // Num-7 case 105: this.state2[this.keys.KEY_B] = value; break; // Num-9 case 99: this.state2[this.keys.KEY_SELECT] = value; break; // Num-3 case 97: this.state2[this.keys.KEY_START] = value; break; // Num-1 case 104: this.state2[this.keys.KEY_UP] = value; break; // Num-8 case 98: this.state2[this.keys.KEY_DOWN] = value; break; // Num-2 case 100: this.state2[this.keys.KEY_LEFT] = value; break; // Num-4 case 102: this.state2[this.keys.KEY_RIGHT] = value; break; // Num-6 default: return true; }

Anyone knows what would be the codes for the switch's joycons?

All javascript emulators work on the switch. Albeit very poorly. I've used and recorded them when I released DNSwitch when the switch first came out

Homebrew JSNES JavaScript NES emulator may be working on switch

Member

Well-Known Member

Member

The Temp's official fox whisperer

Well-Known Member

Well-Known Member

Member

Member

Well-Known Member

Member

Member

The Temp's official fox whisperer

GBAtemp Stoner

Deleted User

Guest

Similar threads

Popular threads in this forum