Disk Interface

[Sploder12]

The most important part of a "Disk Operating System" is the ability to interface with a disk!
More specifically we are interested in an ATA interface since it is the most basic.
Note that this is a preliminary task for having a filesystem.

The must-haves are:

• LBA addressing
• CHS <-> LBA conversion
• A way to get the capacity of a disk
• A way to read/write an arbitrary amount of sectors into/from a buffer

It might be useful to note that the booting drive is stored in memory at 0x7dfd (or next to that address, I haven't verified it). This is the very first thing the boot sector does! (see boot_sect.asm for more info)

[shawnz99]

I'll start looking at this

[shawnz99]

I'm starting looking at this now