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Explain and motivate "ISO"

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This change to 01-multiboot-kernel/index.md fixes issue #337
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2017-06-24 17:08:44 -07:00
committed by Philipp Oppermann
parent 557c6a58ea
commit ab8b40a9d1
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blog/content/posts/01-multiboot-kernel/index.md
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@@ -28,7 +28,7 @@ When you turn on a computer, it loads the [BIOS] from some special flash memory.
[protected mode]: https://en.wikipedia.org/wiki/Protected_mode
[real mode]: http://wiki.osdev.org/Real_Mode
We won't write a bootloader because that would be a complex project on its own (if you really want to do it, check out [_Rolling Your Own Bootloader_]). Instead we will use one of the [many well-tested bootloaders][bootloader comparison] out there. But which one?
We won't write a bootloader because that would be a complex project on its own (if you really want to do it, check out [_Rolling Your Own Bootloader_]). Instead we will use one of the [many well-tested bootloaders][bootloader comparison] out there to boot our kernel from a CD-ROM. But which one?
[_Rolling Your Own Bootloader_]: http://wiki.osdev.org/Rolling_Your_Own_Bootloader
[bootloader comparison]: https://en.wikipedia.org/wiki/Comparison_of_boot_loaders
@@ -187,7 +187,7 @@ _Note_: The `ld` and `objdump` commands are platform specific. If you're _not_ w
[cross compile binutils]: ./extra/cross-compile-binutils.md
## Creating the ISO
The last step is to create a bootable ISO image with GRUB. We need to create the following directory structure and copy the `kernel.bin` to the right place:
All PC BIOSes know how to boot from a CD-ROM, so we want to create a bootable CD-ROM image, containing our kernel and the GRUB bootloader's files, in a single file called an [ISO](https://en.wikipedia.org/wiki/ISO_image). Make the following directory structure and copy the `kernel.bin` to the right place:
```
isofiles