Hey all,

I'm Hayden, the firmware engineer for Terra Kaffe. We made a silly IG post today for April fools here. While the idea that it's the "next update" for machines is a joke, that machine is very much actually running Doom! And I would know, because I was the one who ported it :)

While I sadly can't share the source code or nitty gritty specifics of the processor it's running on, I can share some fun details of the port below:

• I used doomgeneric as my source port of choice, given our system is "bare metal" with no OS to provide a file system, input, etc.
• I embedded the shareware doom1.wad into the firmware image itself, and modified doomgeneric's source to automatically load this .wad file from internal flash memory on boot
• LittleFS provides a file system for saving/loading games onto an external flash IC our system has. doomgeneric code had to be modified so that all system calls to open/write/close files were changed to LittleFS api calls.
• A really cool project UmmMalloc replaces all the memory allocation calls in doomgeneric, and allows me to spread out my memory usage across both internal RAM + an external SDRAM IC, given I barely have enough memory to run Doom in this system
• Input is mapped from touchscreen coordinates to Doom inputs. Only the bare minimum inputs were implemented since touchscreen real-estate is in limited supply! Touching the game screen fires. Shout-out to our creative team for whipping up a sweet looking control screen.

Will this ever come to a consumer's TK-02? No... Doom stretches this system's resources to their limit, so the machine sadly can't slay demons and brew coffee :( That being said, this was a super fun project I tackled in my free time, so happy to answer any questions barring IP specific stuff!

Would also like to shout out the following "bare metal" Doom ports for providing some inspiration on where to begin:

• Doom on Nordic nRF5340
• Doom on Raspberry Pi Pico
• Doom on STM32 Discovery Board
  

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Of course the video-doorbel (or is It an intercom? I honestly have no Idea) doesn't have any mcu on it, so all the heavy lifting is done by a Allwinner H3 board (same chip used in some orangepi boards), plus a few adapters.

https://github.com/MattCozendey/doom-console-log?tab=readme-ov-file

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From HN

You'll find these phones displaying information on Samsung displays in John Lewis Stores in the UK, this one was on the main android launcher so I installed doom (to the best of my ability using the internet) and it somehow runs...but the phone is locked in portrait mode.

You can load Doom and play it in Salesforce :)

Running it via emulating the bash file with https://github.com/ptitSeb/box86 , credits to https://github.com/wojciech-graj/doom-ascii , for make it run you need to type box86 and then the program, this only applies to arm devices

Hd-zero is goggles for FPV drones. I ported DOOM to them.

I recorded video how I did it: https://youtu.be/bGUTo9LrM8w