MS vs PC-DOS and what happened to 640K RAM

Exploring some differences between Microsoft MS-DOS and IBM PC-DOS.
In particular the conventional memory usage, but also more.
MS-DOS 6.22 vs IBM PC-DOS 2000.

Extended BIOS Data Area (EBDA) info: https://www.rigacci.org/docs/biblio/o...

Music by Bensound.com

Chapters:
00:00 MS-DOS 6.22 install
02:20 MS-DOS: doshell, defrag, msd etc commands
06:20 MS-DOS: Gorillas, config.sys and memory usage
09:25 Wiping disk, low-level formatting
11:30 PC-DOS 2000 install
13:45 PC-DOS: dosshell, defrag, qconfig etc commands
17:15 PC-DOS: config.sys, fasta20 and memory usage
24:22 PC-DOS: dynaload and ansi.sys
25:02 PC-DOS: memory usage
25:40 Memory usage comparison
29:55 Summary and comparison
31:14 Park the disk