M README.md → README.md

@@ -1,37 +1,51 @@
 # CeDOS
+
 Simple x86 operating system written in assembly and C.
 
 ## Software Requirements
-* GNU make
-* [https://wiki.osdev.org/GCC_Cross-Compiler](GCC Cross Compiler + matching binutils), tailored for freestanding i686-elf-targets
+
+* CMake + Ninja
+* [GCC Cross Compiler + matching binutils](https://wiki.osdev.org/GCC_Cross-Compiler), tailored for freestanding i686-elf-targets
 * Doxygen: If you want to build the documentation
 * QEMU: To emulate an x86 system. More specifically, `qemu-system-i386`, available via apt.
 
+Easiest way to get these is to use the nix development shell:
+
+```shell
+nix develop
+```
+
 ## Make commands
-Release builds are the default. For debug builds, use `make DEBUG=1 [...]`. You will need to add `DEBUG=1` to all commands, including `run`, otherwise, the release version is run.
 
 ### Build
-```make build```
 
-### Run (in an emulator)
-```make run```
+```shell
+mkdir -p build/
+cd build/
+cmake -GNinja ..
+ninja
+```
+
+The image is put into `build/images/cedos.img` and can be flashed onto a
+bootable storage device or run in QEMU.
+
+### Run (in QEMU)
+
+```shell
+./run.sh build/images/cedos.img
+```
 
 ### Clear output directories
-```make clean```
 
-### Build documentation:
-```make docs```
+```shell
+cd build/
+ninja clean
+```
 
-## Tested build environment versions
-### 2023-03-01
-* GCC 12.2.0
-* binutils 2.40
-* QEMU 4.2.1
+### Run tests
 
-## Roadmap
-[ ] Implement FAT12 support in bootloader
-[ ] Add FAT12 kernel driver with syscall interface
-[ ] Allow execution of ELF files by file system path
-[ ] Implement proper POSIX file interface
-[ ] Add a basic shell
-[ ] Add functions for VGA graphics+```shell
+cd build/
+../test.sh
+```
+