[GTALUG] New Build Computer?

[D. Hugh Redelmeier]

| From: D. Hugh Redelmeier via talk <talk at gtalug.org>

| - CSM should only be needed if you boot MBR-style (i.e. not UEFI)

This turns out not to be the case.

CSM is a fake BIOS.  It is used to implement things link BIOS service
calls.  These are used by:

- MBR boot loaders (lilo, grub-for-MBR)

- old OSes (like DOS)

- initialization code that might be present in som plug-in cards.
  This initialization code was considered an extension of the
  BIOS initialization code.  I imagine that these cards are
  all obsolete now.

My comment left out the last case.

Note: theses service calls assume the CPU is in 16-bit more, something
unlikely for any modern operating system.