FastDOOM

Doom port for DOS, based on PCDoom by @nukeykt. The goal of this port is to make it as fast as possible for 386/486 personal computers.

FastDOOM vs Original

• Added FPS ingame viewer
• Added FPS calculation after timedemo runs
• Added option to render visplanes (ceiling and floors) without textures
• Added option to render walls without textures
• Added option to render Spectres and invisible objects like real transparent objects (harder to see, a little faster to render)
• Added option to render sky as a flat fixed color
• Added option to render Spectre and invisible objects like the Sega Saturn port did
• Added option to render Spectre and invisible objects like Heretic/Hexen
• New option to show only objects that are not far away from the player. All the enemies are still rendered as they're important
• PC Speaker uses all sounds available (just for fun!)
• New mode for PC Speaker (digitized sound!)
• Disney Sound Source support
• COVOX LPT DAC support
• Adlib OPL2 PCM support
• OPL2LPT and OPL3LPT support
• Tandy 3-voice PCM support (SN76489)
• Creative Music System / Game Blaster support
• Audio-CD music support
• PCM music support (through sound fx device)
• Hercules automap support
• Lot's of optimizations to make the game run faster / smoother
• Removed low memory limit (may cause crashes with low RAM)
• New detail level: Potato. It renders the full scene with a quarter width resolution (max 80x200). Much faster rendering, specially on 386 cpu's and slow 8-bit VGA ISA cards.
• Better use of system RAM (full memory allocation)
• Removed network gaming support
• Removed joystick support
• Removed Y mouse movement (move forward/backwards)
• Added autorun support (F12 key)
• Added mono sound support
• Replaced DOS/4GW with DOS/32A providing a good speedup!
• New setup program
• New video modes (Mode 13h, MDA, CGA, EGA, Hercules, Text modes, VESA 2.0, Plantronics Colorplus, Sigma Color 400, Hercules InColor)
• Advanced benchmark support
• Uncapped FPS mode support (frame interpolation, more than 35 fps)
• HiRes VESA video modes support

DEMO

	Doom 1.9 Audio	Doom 1.9 NoAudio	FastDoom 0.2 Audio	FastDoom 0.2 Audio FlatVisplanes	FastDoom 0.2 Audio FlatVisplanes FlatTransparency	FastDoom 0.2 Audio FlatVisplanes Sega Saturn transparency	FastDoom 0.2 NoAudio	FastDoom 0.2 NoAudio flatVisplanes Sega Saturn transparency
FPS	19.56	21.68	22.44	25.77	25.86	26.02	24.79	29.05
Gain	100.00%	110.20%	114.70%	131.70%	132.20%	133.00%	126.74%	148.52%

FastDoom 0.8 Live Demo (Texas Instruments 486DLC @40 MHz, Cirrus Logic GD-5422 ISA):

FastDoom.on.a.TI.486DLC.40MHz_1080p_edit.mp4

Full video here

Build instructions (FastDOOM)

Requirements: Linux or WSL2 on Windows.

1. Install OpenWatcom v2, NASM, GNU Make and DOSBox-X
2. Execute source fdenv.sh
3. Build:
   • Single executable: build.sh <executable> <parameters> Where: "executable" is the executable name (fdoom.exe, fdoomega.exe, ...) and "parameters" can be one of these:
     • "-clean": cleans all generated OBJs,
     • "-stub": adds the DOS/32 stub,
     • "-debug": generates debugging exectable, needs dbgcfg.h file to be adjusted to your needs
   • All the executables + automatic DOS/32 stubs: buildall.sh
   • Generate a full release package (ZIP): package.sh

Example to build a fresh FastDoom executable ready to use on real hardware:

./source fdenv.sh
./build.sh fdoom.exe -clean -stub

Build instructions (FDSETUP)

Requirements: Windows 3.1 or Windows 9x

1. Install Borland C++ 4.52
2. Install Laughing Dog Screen Maker 1.14
3. Run .\FDSETUP\SCREENS\MAKE.BAT (MS-DOS)
4. Open setup.ide project in Borland C++ IDE
5. Build the project

Contributors

This project exists thanks to all the people who contribute.

Star History

Contributing

Feel free to add issues or pull requests here on GitHub. I cannot guarantee that I will accept your changes, but feel free to fork the repo and make changes as you see fit. Thanks!