Please add support for PS1 NegCon

[rmsa5]

Hi there,
I know my request is really specific. I love p1 and there are a couple of games (notably wipeout) that support this unique NegCon Namco controller. I have a couple PSX2USB adapters:

• some basical aliexpress one -> doesn't work (maybe there is some USB traffic, just not picked up by computer drivers)
• the advanced raphnet-tech one that does detect this NegCon controller -> though the issue is openemu (mac multi-machine emulator) doesn't support it :(

It would be absolutely marvelous vixen support this controller.

I am no dev so I can't help with the actual dev, but am pretty tech savvy and will very happily collaborate to capture USB & debug in anyway if it can help make this feature a reality!

Many thanks in advance for even considering my request :)

[isage]

If you know how to capture HID data (usbhid-dump might help)
What i need:

1. Usb VID/PID
2. Device HID descriptor
3. HID reports for all buttons:
   don't press anything, capture HID stream, write down report.
   press and hold left, capture HID stream, write down report and button you were holding
   repeat for all buttons

[rmsa5]

Here is a compilation of the outputs. Let me know if I can provide further info !
https://docs.google.com/spreadsheets/d/1--BC_0oofCTlyytQcqCfWWGlvi-8zLdPO_FAxIEUBGk/edit?usp=sharing

gamepad-tester website also works. If you want we can have a live chat and I can share my screen if it’s clearer :)

[isage]

looks good. but given how cursed that controller is, how would you map it to vita layout?
A/B/1/2 to cross/circle/square/triangle?
twist to left analog X?
L/R to L/R?

[rmsa5]

looks good. but given how cursed that controller is, how would you map it to vita layout?
A/B/1/2 to cross/circle/square/triangle?
twist to left analog X?
L/R to L/R?

Didn’t know this controller was that cursed Ô_Ô

If you don’t mind my asking a few questions:

• The PS1 had games that actually supported the NegCon controller as a specific type of controller, and if I am not mistaken (since I’ve never been able to try my NegCon on real PS1 hardware) would be able to map these unusual I/II/R analog buttons to for instance Accelerator. I wonder if the Adrenaline/PSP’s PS1 emulator has hidden support for this funky controller and if it would be possible to channel real NegCon inputs to a “NegCon mode enabled” PS1 game emulated in Adrenaline.

• I haven’t tried vixen yet since I don’t have the Y cable required (need to find where to buy one). I remember reVita plugin providing the ability to arbitrarily map buttons and axis from an external gamepad to a simulated vita input. Wouldn’t it be possible to work in a similar way, i.e. expose to the user the 4 axes + 8 buttons of this NegCon pad, and let the user map to vita inputs the most relevant way depending on the game? Actually out of genuine curiosity, why did you start from scratch building Vixen to do both hardware driving + funneling it to vita input simulation, rather than follow up on the modular approach of MERLev’s reVita to do the mapping, and extra plugins such as ds34vita and x1Vita to do the HW driver part?

• As a default map, I’d say (NegCon -> Vita):
  dpad -> dpad
  start -> start
  L -> L
  R -> R
  I -> Cross
  II -> Square
  A -> circle
  B -> triangle
  twist axis -> left joystick x-axis
  Start + A -> Select (<- here for instance, reVita would already be able to achieve this)

[isage]

you can use revita along with vixen.
As for "from scratch part", ds34vita and x1vita and others target bluetooth controllers. They also do the same - parse bt packets into vita controls

As for negcon support in adrenaline - i don't think it cares (or ps1 cares), as far as i understand you just select that controller type in game. Which actually gives me an idea - I'll check how ds buttons are mapped if you select negcon and map negcon accordingly
nvm, did some tests, and it looks like games have some way to auto-detect negcon

Also, given how I, II and L buttons are analog, we can't really map them to traditional buttons, as we'll lose analog inputs

[isage]

I guess i'll do mappings from here https://psx-spx.consoledev.net/controllersandmemorycards/#controllers-racing-controllers

[rmsa5]

Also, given how I, II and L buttons are analog, we can't really map them to traditional buttons, as we'll lose analog inputs

How are DS4 joypad L2/R2 analog triggers dealt with currently? Are they just dropped? or are they mapped/mappable to virtual vita inputs (either mimmicking real buttons, or virtual front touch / back touch buttons like in Adrenaline) ?

[rmsa5]

@isage by the way, is the Y-cable you mention on your other repo something that can be bought somewhere (amazon...) or does it have to be custom built? I don't have the skills or equipment to build my own (and frankly don't understand most of the technical details required)

[rmsa5]

@isage if ever you have time to spare, I'd really like a chat to better understand how external joypad support (either bluetooth or wired) is achieved, vs the mapping to vita inputs? I can't help but wonder why these 2 tasks are not decorrelated from one each other, with numerous HW drivers progressively adding wider HW support and presents to some kind of "universal mapper" the set of mappable analog axis and digital buttons (that may vary from input device to another), and that "universal mapper" that would be able to map any axis/button to any vita input(s) like what reVita remapping does.

[isage]

@isage by the way, is the Y-cable you mention on your other repo something that can be bought somewhere (amazon...) or does it have to be custom built? I don't have the skills or equipment to build my own (and frankly don't understand most of the technical details required)

I think i saw something on amazon, but can't find rn.

[isage]

@isage if ever you have time to spare, I'd really like a chat to better understand how external joypad support (either bluetooth or wired) is achieved, vs the mapping to vita inputs? I can't help but wonder why these 2 tasks are not decorrelated from one each other, with numerous HW drivers progressively adding wider HW support and presents to some kind of "universal mapper" the set of mappable analog axis and digital buttons (that may vary from input device to another), and that "universal mapper" that would be able to map any axis/button to any vita input(s) like what reVita remapping does.

because that would require some external mapper, some well-established api and would complicate things.. and we already have reVita
all input plugins work by either calling vita input emulation api (this works only for first gamepad) or by hooking vita input functions, so when app tries to read input - input plugin overwrites input values. reVita works same way - takes original input report and overwrites it according to mappings.

[isage]

btw, any chance you have original psx dualshock?
It's better to support it (well, rather raphnet psx to usb completely), and negcon would/should be supported automatically

[rmsa5]

btw, any chance you have original psx dualshock? It's better to support it (well, rather raphnet psx to usb completely), and negcon would/should be supported automatically

All my original PS1 gear is out of reach currently :( what would you be needing in the event I get hold of one?

[isage]

Same stuff you did for negcon (just reports part)