You have to do a tiny bit of actual work to get this going. If you don't have 30 minutes to spare, just go play on Steam and call it a day.
A is attack
B is use
X is weapon backward
Y is weapon forward
combined press of X and Y brings up automap and cycles through (second press goes to line map, third press back to game)
D-PAD/Analog Stick is move
L trigger is strafe left (analog sensitive)
R trigger strafe right (analog sensitive)
START is start (bring up menu)
Pre-requisites
The build is known to work on the following platforms as of the current commit:
Debian (version?)
Ubuntu 22.04
Windows 11 - Cygwin 64-bit
Windows (version?) - DreamSDK
It should work on most other Linux environments.
You will need a host/native GCC install and a full working Dreamcast/KallistiOS toolchain install (https://dreamcast.wiki/Getting_Started_with_Dreamcast_development).
Repo contents
Whatever the directory you cloned this github repo to is named and wherever it is located, it will be referred to in this document as
doom64-dc
This guide will assume that you cloned it into your home directory.
If you need to get to the top level of the repo, it will say
cd ~/doom64-dc
Under doom64-dc, you will find
doom64-dc/
-- README.md (you're reading it right now)
-- Makefile, Makefile.kos (how it gets built)
-- wadtool/ (the tool that builds texture and WAD files from Doom 64 ROM)
-- selfboot/ (all files needed to make a bootable CD image)
---- ogg/ (all of the music tracks as 44khz mono OGG)
---- sfx/ (all of the game sfx as 22khz ADPCM WAV)
---- vq/ (where the sprite sheet for non enemy sprites ends up)
How to generate Doom 64 disc image
Somehow acquire a Doom 64 ROM in Z64 format.
Check that your Doom 64 ROM is the correct one.
The below is the expected md5sum output
md5sum doom64.z64
b67748b64a2cc7efd2f3ad4504561e0e doom64.z64
Now place a copy of doom64.z64 in the wadtool directory.
Go to the repo directory and compile it like any other KallistiOS project. Make sure you source your KOS environment first. It is starting to look like there is an issue when it is built at -O2 without lto. Modify environ.sh so KOS_CFLAGS has -O3 -flto=auto instead of -O2 before you build.
To build the source into an ELF file, run make.
source /opt/toolchains/dc/kos/environ.sh
cd ~/doom64-dc
make clean
make
As part of the build, Make will automatically build and run wadtool.
This should take a minute or less to run depending on your processor and disk speed.
The first terminal output you see should match the following except for the time values (the first time you run make):
Compiling wadtool
Running wadtool
real 0m20.368s
user 0m19.836s
sys 0m0.233s
Generated data files in specified selfboot directory.
Done.
Subsequent runs will not rebuild wadtool but start at Running wadtool or skip that too if the generated files already exist in selfboot.
When it is complete, you will now have the following new files in the ~/doom64-dc/selfboot directory:
alt.wad
pow2.wad
vq/non_enemy.tex
You now have all of the updated files required to run Doom 64 for Dreamcast in the places they need to be.
If you have mkdcdisc installed, you can use the cdi build target to create a self-booting CDI.
cd ~/doom64-dc
make cdi
If you have both mksdiso and mkdcdisc installed, you can use the sdiso build target to create an ISO suitable for loading from SD card with Dreamshell ISO loader.
cd ~/doom64-dc
make sdiso
If you are trying to use any other tool, you are on your own.
Good luck. :-)