[syslinux] simple message under BIOS/CSM/LEGACY

[Gregory Bartholomew]

On Mon, Aug 1, 2022 at 2:54 AM Pascal via Syslinux <syslinux at syslinux.org>
wrote:

> hi,
>
> I have a live system with only UEFI boot supported.
>
> to indicate this to users who have not yet switched to UEFI, I have below
> this simple little piece of code (partly found on the internet) that I
> compile with nasm and I push onto the MBR.
>
> it runs perfectly on some PCs and in virtual machine with Qemu, but refuses
> to run on other PCs by displaying either a kind of smiley logo or a simple
> blinking cursor.
>
> does anyone have any idea or clue about this?
>
>
I guess a truly UEFI-only system won't execute a MBR first-stage
bootloader. You'd probably have to compile your program as an EFI
executable and put it on the ESP on such systems. :)