by MonochromeWench ([email protected]) modified by olegchir ([email protected])
Performance tweaker for Fallout New Vegas and TES V: Skyrim (formerly Fallout New Vegas 4GB or FNV4Gb)
fallout-skyrim-optimizer is a tool to load Fallout New Vegas and Skyrim with the Large Address Aware executable flag set so the entire 4GB Virtual Memory Address Space can be used by the game. This is useful when using lots of mods.
fallout-skyrim-optimizer is licensed under the terms of the GNU Lesser General Public License version 2.1. Read the included lgpl-2.1.txt for the terms. Source code is included with the package. Original binaries compiled using Microsoft Visual Studio 2012 on Windows 8 x64 with Win32 target.
First, make sure Steam is running. Then run FNV4GB.exe to launch the game! You don't even need it in the games directory, just make sure FNV4gb.exe and fnv4gb_helper.dll are together.
If your version of Fallout New Vegas is not the standard version with the SteamAppID of 22380 you need to run fnv4gb.exe and specify the actual SteamAppID on the command line. Example: fnv4gb.exe -SteamAppID 22380
It is required for heavily patched mods that provides steam-free mode and require modified exe files and inconsistent cache. Put fnv4gb.exe and fnv4gb_helper.dll for Fallout New Vegas (or skyrim4gb.exe and skyrim4gb_helper.dll for Skyrim) into the game directory and run our exefile.
Warning! This patch created only for legal use of the game. Please don't use it with SKIDROW cracks (or anything like that) because it is prohibited by law of most countries including Russia :-)
FNV4GB.exe [-exe string] [-laaexe string] [-SteamAppID number] [-nolaa]
[-noskse] [-extradll string [-extradll string [...]]]
[-- game parameters]
Details
-exe The games original executable. If not an absolute path FNV4GB will look for the executable in the Fallout New Vegas directory using paths that should be in the registry. Default is FalloutNV.exe.
-laaexe The executable created by the loader that has the LAA flag set. This must not be the same file as the original executable. * If this is an absolute path the file will be created using that exact path. * If the path starts with .\ the exe will be created relative to the directory containg FNV4GB. * Otherwise it will be created relative to the original executable. Default is use the original's name and create it in a directory called 'exes' in the directory containing FNV4GB.exe.
-SteamAppID The SteamAppID id to use. Default is 22380 for Fallout New Vegas and 72850 for Skyrim.
-nolaa Don't set the LAA flag or unset it if it was already set in the original executable.
-nonvse Disable attempting to load NVSE (New Vegas Script Extender) when playing Fallout New Vegas
-noskse Disable attempting to load SKSE (Skyrim Script Extender) when playing Skyrim
-extradll An extra dll to load into the laaexe process after its been created. This can be specified multiple times to load more than one dll.
-- Anything after this will be passed as is to the game when the loader creates the process.
Examples
FNV4GB.exe -laaexe .\FalloutNV.exe Create a LAA Exe called FalloutNV.exe in the directory containing FNV4GB. This is probably what you'd want to do if you need some other application to detect FalloutNV.exe loading, not FalloutNV.exe.4gb
FNV4GB performs the following actions
- Gets the Install Path for the game from the registry value: HKEY_LOCAL_MACHINE\SOFTWARE\Bethesda Softworks\FalloutNV\Installed Path
- Changes to the games Directory
- Copies FalloutNV.exe to FalloutNV.4GB if needed
- Sets the LARGEADDRESSAWARE bit on FalloutNV.4GB if needed
- Sets the environment variable SteamAPPId to 22380 (or whatever value was specified on the command line) which tells Steam to run the game (not restart and load the launcher)
- Creates a new process for FalloutNV.4GB with the main thread suspended
- Injects fnv4gb_helper.dll into the FalloutNV.4GB process
- fnv4gb_helper unsets the LARGEADDRESSAWARE bit in the loaded headers so when steam verifies the loaded executable in memory it passes
- fnv4gb_helper hooks the GetTickCount function to attempt to reduce stuttering
- fnv4gb_helper hooks the CreateFileA function so when steam attempts to verify the disk executable file against the loaded memory it loads the untouched FalloutNV.exe instead of the modified FalloutNV.4gb
- The FNV4GB loader verifies that Large Addresses are enabeles in the FalloutNV.4gb
- FNV4GB loader unsuspends the main thread so the game can run