Wikis > Visual Pinball Knowledge Base > Turning on/off "at91jit"

So what is it ? DJRobX best explains it here.

http://vpuniverse.com/forums/topic/2728-sam-build-with-modular-dmd-drivers-for-pindmd123-and-pin2dmd/?do=findComment&comment=33425

But, you are probably not that interested in what it does, but how you may be able to prevent a almost contantly crashing table ? Ok, fine. If you however read the above, you’ll notice there is a reason for this code to exist in the first place. So, if you turn it off and it still isn’t resolving your problem. Turn it on again until at least this wiki page tells you otherwise.

So, ok – enough. Get to it … sure.

win-key + r -> regedit – you get a editor that looks something like this.

This is just a illustration on how the editor looks. Let us say we have a problem with “The Walking Dead” and the rom it uses is … tada … twd_156h. Inside the table script you will often find this line

cgamename = twd_156h

This is the rom that the table loads and the zip-file you need to have in your roms folder in order to get the game to work.
So, now. You have to navigate yourself down to the rom name for the table in the registry editor.

You need to open up the hive. HKEY_CURRENT_USER – the subkeys SOFTWARE -> FREEWARE and find the twd_156h subkey, then double-click when you find at91jit under the subkey and change that value from a 1 to a 0.

After you have change it, make sure to close all open tables, since VP needs to read the key change all over again. This time with a value of 0 instead of 1. 0 means disabled, 1 enabled.

Some have reported getting “double sound” when they disable this key. In general you can say, the stronger/faster hardware you have the better is the chance that you don’t get any problems by disabling at91jit. You need to read the first link to understand why it is there in the first place I guess :-)

Good luck.

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1 Comment

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  1. randr 2 months ago

    Great info :good:

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