G940 - Force Feedback - discussion

[James DeSouza]

6 hours ago, Drakoz said:

Never heard of disabling core isolation.  I'll check that on my system. If this is a Windows 11 vs. 10 issue, this might be important to know.  I have several joysticks, but for helicopters I hate flying without FFB.  Very glad to hear you got it working.

It causes all kinds of issues with older software for some reason, and it also eats into your performance too though it's not so bad.  It is in Win 10 but disabled by default and is in Win 11 and on by default unless you upgraded your Win 11 from Win 10 in which case it stays off for some reason.

 

If I wasn't so stupid it would have occurred to me to disable it sooner, rather than needing to be prompted, but I got there in the end.

 

Windows 11 is actually quite a compatability nightmare.  For example if games aren't on an up to date enough runtime (I can't remember the specifics) Win 11 just flat out won't launch them, Motorsport Manager being one of the games I own that has this problem.  Except for some Win 11 users if they completely unplug the PC from the internet it will allow them to launch the game and for some it won't (it won't for me).  So you have to edit a bunch of things in your registry to disable the check for these runtimes, but then that causes newer programs to break.  Because of all this, if you aren't using a 12th gen intel it's just an objectively bad idea to use Win 11.

[don_prince]

Soo, I have a G940 at home and a G27. With Logitech not updating their drivers and the Core Isolation issues, I do not like them to be paperweights and for me they are good ennough.

What I noticed is people developing their own FFB Joystics and the simplicity of the G940's design. 

Before I go off and develop a board with an ESP32, Looking at @fred41 and others here, would you argue it is feasable to modifiy the firmware and use the current board to run it with for instance the rhino software?

[TORC]

In my opinion, the G940 not only has problems with the drivers but also the hardware isn't up to what we expect these days.

If you are looking at building your own, have you seen the VPForce Rhino? The Rhino itself might be overkill for your application, but it could be a good starting point (the board and drivers at the very least).

[don_prince]

On 9/23/2023 at 5:27 AM, TORC said:

In my opinion, the G940 not only has problems with the drivers but also the hardware isn't up to what we expect these days.

If you are looking at building your own, have you seen the VPForce Rhino? The Rhino itself might be overkill for your application, but it could be a good starting point (the board and drivers at the very least).

I'm still going to try, 

Yes I'd love a VPForce Rhino, and am following that with intrest, however sinking 1k into something I do not use that often seems a bit of a waste... If you ever have flown in real life you know nothing beats the real thing, so for me the g940 does the job sufficient, and I hate ewaste.

I did also find these clues in reddit however the guy behind it and the firmwares seem to be gone so: https://www.reddit.com/r/ReverseEngineering/comments/21kgtc/comment/cgh6lmc/

I found someone on github that reverse engineered the g27 which uses a surprising lot of amount of the same components, so I bet the g940 is very similair. Not only will this likely keep the G940 useable but also the G27. 

[artao]

On 8/21/2020 at 9:13 AM, jib said:

Grr has anyone here got SimFFB working on Windows 10?

 

I had to reinstall my PC after wiping my drive out in a "cloning accident".

 

When I try and run the 64bit version of SimFFB I get this:

 

 

If I try and copy the MSVCR100.dll from \Windows\Syswow64 to \SimFFB directory that message goes away.

 

but then I get this:

 

 

The 32bit version sort of runs but doesn't detect my FFB joystick (I think because it is running on 64bit operating system)

 

This is so frustrating because SimFFB is the only way I like to fly the KA-50 with my G940!

Bit of a necro ...
I just acquired a G940 a couple days ago. I have applied this firmware and all seems fine.

Have you resolved this issue with being unable to run simFFB under Win 10? I'm experiencing the same thing.

[firefox121]

On 5/12/2024 at 11:24 PM, artao said:

Bit of a necro ...
I just acquired a G940 a couple days ago. I have applied this firmware and all seems fine.

Have you resolved this issue with being unable to run simFFB under Win 10? I'm experiencing the same thing.

Don`t know if this will solve your issues, mine started the same but with a Microsoft SIdewinder FFB2, The problem was solved when I unticked at my vjoy virtual devices the force feedback.

I remember also there is a modded latest version, try to search at forums, or PM a private and I will sens you a copy.

[artao]

16 hours ago, firefox121 said:

Don`t know if this will solve your issues, mine started the same but with a Microsoft SIdewinder FFB2, The problem was solved when I unticked at my vjoy virtual devices the force feedback.

I remember also there is a modded latest version, try to search at forums, or PM a private and I will sens you a copy.

I don't have vjoy installed.

[BMaxis]

Hi guys!

I can't patch the firmware

When I run the file g940_patch.exe - This App Can’t Run on your PC (Windows 11)

How to fix it?

Or can you share the patched firmware?

Edited June 24, 2024 by BMaxis

[TORC]

I never ran it on Win11, only Win10. It might have something to do with the virtualization in Win11… I think there might be a way to turn it off but if you’ve got an old Win10 PC or laptop somewhere that might be easier/safer?

[BMaxis]

15 minutes ago, TORC said:

I never ran it on Win11, only Win10. It might have something to do with the virtualization in Win11… I think there might be a way to turn it off but if you’ve got an old Win10 PC or laptop somewhere that might be easier/safer?

I tried on a working computer (Windows 10), the same problem.
I tried recommendations as in the video -

It did not help

[TORC]

Apologies, but I'm not in a position to try to apply the firmware to actual hardware any more - I hope someone else can help?

[Allen007]

check your file size,the correct file size is 7.50 KB,

my computer is windows 11,the app is running well。

2024/6/24 PM6点30分，BMaxis说：

Hi guys!

I can't patch the firmware

When I run the file g940_patch.exe - This App Can’t Run on your PC (Windows 11)

How to fix it?

Or can you share the patched firmware?

 

Edited June 28, 2024 by Allen007

[BMaxis]

On 6/28/2024 at 2:26 PM, Allen007 said:

check your file size,the correct file size is 7.50 KB,

Thanks! You were right. I did not save the file from the github site correctly

[artao]

HEY! I don't know why, but the simFFB from the initial post works now. Yay
Now ........ All the settings. uhh ... In particular what are offset x/y for? And is deadband x/y to account for the play in the stick? Is there another way I can remedy that?
Otherwise, I suppose it's a matter of experimenting with settings while playing.

[artao]

Anyone got any tips on tuning? In particular for helos. Settings relationships between the Logitech software, DCS, and simFFB ....... I'm just not getting it; thus haven't been using simFFB. Largely cuz I feel like I'm just blindly groping around.

[ebabil]

hi guys. I have found a cheap g940 on internet. I have msffb2 and I use it for helos. but  it has too few buttons and its grip is ugly as hell. and I don't know how to mod it.

if I get this g940 (I will use only the stick, not the throttle and pedals), will it perform same as msffb2? or is it waste of money?

[TORC]

Hi @ebabil,

I didn’t see this sooner, so I imagine you’ve already made your decision one way or the other. If it helps though, from my experience, the G940 does work “plug and play” with DCS, and the buttons feel similar to the MSFFB in use. I found my stick to feel more “coggy” than the MSFFB, though both those older sticks feel very ordinary compared to something newer (and far more expensive) like the Moza AB9.

The limitation on the G940 is the firmware in the device causing problems with small stick movements around the center position, and a pretty weak gimbal setup inside the device. And obviously these older devices don’t have the force the newer ones do.

In my opinion, an unmodified G940 is a waste of money these days.

[ebabil]

thanks for the heads up. one of my friend has been trying to modify my msffb by replacing its grip with a ch fihgter stick.

[StiewieZA]

Hi everyone. Does someone by any chance have the g940 fix available? The GitHub page seems to be down.

[BMaxis]

On 2/28/2025 at 10:49 AM, StiewieZA said:

Hi everyone. Does someone by any chance have the g940 fix available? The GitHub page seems to be down.

 

g940_patch.zip