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misc: Update README.md

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@ -20,16 +20,18 @@ such as Long Mode, 5-level paging, and SMP (multicore), to name a few.
* ext2/3/4
* echfs
* FAT32
* ISO9660 (CDs/DVDs)
### Supported partitioning schemes
* MBR
* GPT
* Unpartitioned media
## Warning about using `unstable`
## Warning about using `trunk`
Please refrain from using the `unstable` branch of this repository directly, unless
Please refrain from using the `trunk` branch of this repository directly, unless
you have a *very* good reason to.
The `unstable` branch is unstable, and non-backwards compatible changes are made to it
The `trunk` branch is unstable, and non-backwards compatible changes are made to it
routinely.
Use instead a [release](https://github.com/limine-bootloader/limine/releases), or a [release branch](https://github.com/limine-bootloader/limine/branches) (like v1.0-branch).
@ -48,19 +50,15 @@ git clone https://github.com/limine-bootloader/limine.git --branch=v1.0-branch
```
(replace `v1.0-branch` with the chosen release branch)
Also note that the documentation contained in `unstable` does not reflect the
Also note that the documentation contained in `trunk` does not reflect the
documentation for the specific releases, and one should refer to the releases'
documentation instead, contained in their files.
respective documentation instead, contained in their files.
## Building
### Building the bootloader
Building the bootloader is not necessary as a prebuilt copy is shipped in this
repository (`limine.bin`).
Should one want to build the bootloader to make sure the shipped copy is authentic,
to develop, to debug, or any other reason, it is necessary to first build the
set of tools that the bootloader needs in order to be built.
It is necessary to first build the set of tools that the bootloader needs
in order to be built.
This can be accomplished by running:
```bash
@ -73,27 +71,23 @@ After that is done, the bootloader itself can be built with:
make bootloader
```
A newly generated `limine.bin` image should now be present in the root of the repo.
This newly built image should match 1:1 (aka, same checksum) with the one shipped
with the respective commit.
The generated bootloader files are going to be in `bin`.
### Compiling `limine-install`
To build the `limine-install` program, simply run `make` in the root of the repo.
This will embed the `limine.bin` bootloader image from the repository's root into
`limine-install`, ready to be deployed to a device.
This will embed the `limine-hdd.bin` bootloader image from the `bin` directory into
`limine-install`, ready to be deployed to a USB/hard drive (or disk image).
Then use `make install` to install it, optionally specifying a prefix with a
`PREFIX=...` option.
Installing `limine-install` is optional as it can also be used from the root of the
repository just fine.
Installing `limine-install` is optional as it can also be used from the `bin` directory of the repository just fine.
## How to use
### MBR
In order to install Limine on a MBR device (which can just be a raw image file),
run the `limine-install` as such:
run `limine-install` as such:
```bash
limine-install <path to device/image>
@ -116,6 +110,25 @@ In case one wants to let `limine-install` embed stage 2 within GPT's structures,
simply omit the partition number, and invoke `limine-install` the same as one would
do for an MBR partitioned device.
### CD-ROM ISO creation
In order to create a bootable ISO with Limine, place the `limine-cd.bin` and
`limine.sys` files into a directory which will serve as the root of the created ISO.
(`limine.sys` must either by in the root or inside a `boot` subdirectory;
`limine-cd.bin` can reside anywhere).
Place any other file you want to be on the final ISO in said directory, then run:
```
genisoimage -no-emul-boot -b <relative path of limine-cd.bin> \
-boot-load-size 4 -boot-info-table -o myiso.iso <root directory>
```
*Note: `genisoimage` is usually part of the `cdrtools` package.*
`<relative path of limine-cd.bin>` is the relative path of `limine-cd.bin` inside
the root directory.
For example, if it was copied in `<root directory>/boot/limine-cd.bin`, it would be
`boot/limine-cd.bin`.
### Configuration
Then make sure the device/image contains at least 1 partition formatted in
a supported filesystem containing a `/limine.cfg` or `/boot/limine.cfg` file