On Tue, 27 Apr 2021 at 15:55, Mateusz Viste <[email protected]> wrote: > > On 27/04/2021 15:43, Liam Proven wrote: > > UEFI vs BIOS is either-or. A single machine can't have both, and I do > > not know of any where it is a choice. It is a design decision. > > On my Thinkpads the BIOS allows to choose the boot method - either UEFI > or "legacy". The latter allows to boot DOS, the former doesn't.
I own 5 Thinkpads. I know. This does not mean you are choosing between 2 firmware chips, a BIOS one and a UEFI one. It has 1 type of firmware, only, and this has CSM: i.e. it can emulate a BIOS. The difference is in the boot media. It can boot legacy media (via a bootsector in the MBR) and it can boot UEFI media (by loading a stub in a FAT32-format EFI System Partition, the ESP). Most firmware has this and can do both. Some have a setting to let you choose which it tries first. The Thinkpad firmware lets you make the choice every boot. This kind of thing is *why* I buy Thinkpads. -- Liam Proven – Profile: https://about.me/liamproven Email: [email protected] – gMail/gTalk/gHangouts: [email protected] Twitter/Facebook/LinkedIn/Flickr: lproven – Skype: liamproven UK: +44 7939-087884 – ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053 _______________________________________________ Freedos-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freedos-user
