DoomGeneric NTNative

This is a fork of ozkl's DoomGeneric which adds port to the BootExecute environment of Windows XP and later.

Requirements for building DoomGeneric NTNative

1. Visual Studio 2017 Windows XP toolset.
2. InbvShim (https://github.com/Cacodemon345/inbvbootdrv).
3. Windows 7 DDK (for building InbvShim and ntdll.lib).

Requirements for running

Only tested on Windows XP 32-bit. I don't know about later versions.

Building

Note: Only 32-bit Debug builds are supported, anything else is broken. Copy over the ntdll.lib file from \path\to\WinDDK\7600.16385.1\lib\wxp\i386\ to the doomgeneric directory inside the project. Open the solution, right click "doomgeneric_nt" and select "Build".

Building InbvShim

From the x86/x64 Free Build Environment, cd to the directory where you have cloned InbvShim repository, and type 'build' to build the driver. You will find the inbvbootdrv.sys file in the objfre_wxp_x86 (objfre_win7_x64 if building for x64) folder.

Installing InbvShim

Copy it to your system32\Drivers directory of your Windows installation. And then grab the inbvbootdrvinst.reg from one of the releases and double-click it to install.

Installing DoomGeneric NTNative

Copy doomgeneric_nt.exe to C:\Windows\system32\ directory. There are two ways of launching it:

1. Registry modification:

WARNING: Backing up the registry is very important before going down this path.

Open Registry Editor (regedit), go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager. Double-click BootExecute.

Replace this:

autocheck autochk *

with:

autocheck autochk *
doomgeneric_nt -iwad \??\C:\Windows\doom2.wad -cdrom

Replace \??\C:\Windows\doom2.wad with the location where the IWAD is installed (remember to prefix it with \??\ before the full path).

Note that I don't recommend this way because it can make input non-functional, making it impossible to quit the program and requiring a hard reset.

2. Native Shell (assuming you installed it beforehand):

cd to the directory where DoomGeneric NTNative is installed and type:

doomgeneric_nt.exe -iwad \??\path\to\iwad.wad -cdrom

Replace \path\to\ with the location where the IWAD is installed.

Extra bonuses:

1. 16-color mode for Windows GDI port activated with -4bit option.

Bugs:

1. Savegames are broken.
2. Picking a weapon crashes the program (bug inherited from original DoomGeneric).
3. It's slow as hell, probably could use FastDoom's EGA drawing code for it.

License:

Same as original DoomGeneric, except for some files:

i_main_nt.c: ReactOS project license. doomgeneric_nt.c: Uses code both from ZenWINX and Native Shell (LGPL). Bundled NDK: Used under the terms of GPLv2.