The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Yes, DOOM can run on an Atari ST: the STDOOM project provides a TOS program for playing Doom and Doom II. But its 4 MB RAM minimum and recommendation of a 16 MHz machine make the practical answer more specific than “any ST will do.” The project warns that an 8 MHz computer may be unplayably slow.
What Atari ST do you need?
STDOOM specifies at least 4 MB of RAM and recommends a 16 MHz computer, such as a Mega STe. It says an 8 MHz machine should run the program but is expected to be unplayably slow. Treat those as the STDOOM project’s own requirements and guidance, not as a guarantee of a particular frame rate on every configuration.
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Check your machine’s actual memory and processor speed before setting it up. If an upgrade is needed to reach 4 MB, confirm that the specific memory expansion is compatible with your model.
STDOOM also supplies different executables for some faster systems: STDOOM20.TOS is named for machines with at least a 68020 and no FPU, while STDOOM2F.TOS is for a 68020 system with an FPU. Consult the project’s current instructions for the appropriate build: STDOOM on GitHub.
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How to install and start STDOOM
- On a real or emulated ST hard drive, create or choose a folder for the game.
- Copy
STDOOM.TOSinto that folder. - Place a compatible WAD file, such as
DOOM1.WAD, alongside the executable. - Start
STDOOM.TOSfrom the ST desktop or your usual launcher.
These are the project’s documented setup steps; it does not mean that the game data is bundled with the executable. See the project repository for its files and any additional instructions.
What the Atari ST version looks and sounds like
STDOOM documents two display modes: 320×200 with 16 colours, and 640×200 with four colours. It also offers a zoomed mode intended to improve performance, selected by reducing the game window size. The available options balance colour and detail against the constraints of the hardware.
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- Simply plug into the back of your ST and and your monitor VGA into it and use the switch on top to switch between LOW-MEDIUM and HIGH resolutions out to your monitor. The adaptor takes care of hooking up the right signals to the right places.
- Make sure your monitor can handle the horizontal frequency of 15.75 kHz and you are good to go. There are plenty of modern monitors capable of this, just search 15kHz monitors and see if yours is listed.
- Adjustable resistors are placed before the red, green and blue outputs with default resistance 45-55 ohms.(Range: 0-100 ohms) You could adjust the resistor value if you want. The resistance values of the three resistors are usually the same. (Actually no adjustment required in most cases)
For audio, the project documents sample effects through STe DMA sound. Its YM-2149 music support is marked as a work in progress, so the documented feature set should not be read as complete music playback. The -nosfx option disables STe DMA effects for plain ST hardware.
Keyboard and mouse are documented as input options. Network gameplay is listed as not implemented.
Can you run it on original hardware or an emulator?
The setup instructions cover both a real ST hard drive and an emulated ST hard drive. An AtariCrypt post dated May 4, 2025 describes trying the port on an accelerated Mega STe and under emulation, but that is a dated account, not a controlled benchmark or a promise of equal performance across emulators. For the requirements and current documented features, use the STDOOM repository.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How STDOOM differs from other Atari-compatible Doom projects
“Doom for Atari ST” can refer to distinct projects. Their memory figures and feature lists are not interchangeable.
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| Project | Hardware guidance | Game content and display | Audio and controls |
|---|---|---|---|
| STDOOM (project repository) | At least 4 MB RAM; 16 MHz recommended; 8 MHz expected to be unplayably slow. | Doom and Doom II; 320×200, 16 colours, or 640×200, four colours; zoomed mode also documented. | STe DMA sample effects; YM-2149 music is work in progress; keyboard and mouse. Network play not implemented. |
| Doom8088: Motorola 68000 Edition (separate project repository) | At least 512 KB RAM, with 1 MB recommended; supports several 68000 systems, including Atari ST. | Doom 1 Episode 1 only; Atari ST version lists 16-colour display modes. | PC-speaker-like sound effects; no music, save/load, multiplayer, PWADs, mouse, or joystick listed. |
| Experimental SDL Doom listing (Atarimania catalog, 2026) | Catalog says it is only really playable on TT/Falcon or with a fast CPU setting in Hatari; it also notes Mega STe switches to 16 MHz with cache mode. | Lists DOOM.TOS for ST-compatible hardware and DOOM_030.TOS for TT/Falcon; describes greyscale on ST and 256 colours on TT/Falcon. |
Not stated in the catalog listing. |
The comparison shows why a smaller RAM requirement does not automatically make another port equivalent to STDOOM: Doom8088 targets a narrower slice of the game and omits multiple features. The SDL entry is a separate catalog listing, not STDOOM documentation, and its TT/Falcon guidance should not be applied to STDOOM.
Quick Recap
Bottom line for choosing a setup
- For STDOOM and both Doom and Doom II, aim for a machine with at least 4 MB RAM and preferably a 16 MHz processor.
- If you have an 8 MHz ST, the project warns that performance may be unplayably slow.
- If your priority is running a distinct port with lower stated memory requirements, Doom8088 is an option to investigate, but it supports only Doom 1 Episode 1 and lists substantial omissions.
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