MS-DOS: Need to know

MS-DOS: Need to know Part 1

Now that Microsoft has open sourced MS-DOS it’s a good time to look at filing systems, blocks and the FAT and how they are used. Let’s explore the basics of a DOS – Disk Operating System. There is a big problem with disk drives. No, not the constant running out of space that we used to suffer from, but the deeper computer science and engineering problem of actually making them useful at all. We are so familiar with disk drives being delivered to us in a usable form that it is first necessary to go back to the raw hardware to see what the problem is. In a hard disk drive…

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