Liam Proven composed on 2021-04-27 18:24 (UTC+0200): > A BIOS is one type of firmware. UEFI is a different type of firmware. > There are others, but not in PCs, usually.
> If a computer has UEFI, it doesn't have a BIOS. If it has a BIOS, it > doesn't have UEFI. > CSM is a UEFI feature. If a machine's firmware has CSM, it must be > UEFI. If it is UEFI, it is not a BIOS. That means the computer does > not have a BIOS: it has UEFI instead. > If it has UEFI then it doesn't have a BIOS. What this reads is if it has UEFI, it has no basic input/output system. That makes no sense. Without *a* basic input/output system, by whatever name, non-volatile storage's controller doesn't get found, so program code doesn't get found and loaded, keyboard can't redirect into setup,or be logically connected, etc. UEFI provides basic input/output services, so it is a BIOS, just a rather evolved one with a changed name, little different than when Lucky Goldstar changed its name to LG. > Some UEFI can emulate a BIOS. Some can't. Which ones can't find a keyboard, mouse, storage controller or other common I/O device? What am I missing? -- Evolution as taught in public schools is, like religion, based on faith, not based on science. Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/ _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user