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# linux-486
This repo provides the files necessary to build a modern Linux-based "operating system" for old i486 systems with at least 8MB of RAM. Build scripts for all components of the system are provided. An i486-linux toolchain is also built, enabling you to compile other programs for use with the system.
The generated boot floppy disk provides you with a Busybox system that is kept entirely in memory. uClibc's shared library files are also loaded into memory, allowing other programs to save on memory (as opposed to using static binaries).
A second floppy containing additional kernel modules can also be generated. Both floppies are ext2 formatted.
## Build requirements
* building tools (make, gcc, linux kernel's requirements, etc.)
* bash
* wget
* tar, xz, bzip2
## Build steps
Run the build scripts in this order:
1. `build-toolchain.sh` (after this script, add ~/i486-linux/bin to your PATH)
2. `build-linux.sh`
3. `build-busybox.sh`
4. `build-floppy.sh`
5. `build-modules.sh`
After successful execution of all scripts, you should have `floppy.img` (boot image) and `modules.img` (modules). These can be `dd`'d to a 1.44M 3.5" floppy disk.
## Booting the system
The system requires an i486 or better processor, a 3.5" floppy drive, and at least 8MB of RAM (8320K for QEMU).
Notes:
* Once the system is booted, the boot floppy is no longer needed.
* root's password is `toor`.
* Mount the modules floppy to `/lib/modules`; then, use `modprobe` for loading and unloading.
* The `msdos` module may need to be loaded to read MS-DOS/FAT floppies.
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