Creating an ISO bootable flash drive to run through the BIOS

I need to create and write an image to a USB flash drive, which, when run through the BIOS, will display text and/or an image on the screen. I scoured the Internet, but found only instructions for creating a bootable Windows or Linux flash drive.

As far as I understand, without drivers, nothing can be displayed on the screen. Therefore, I need to build my own distribution, which will simply display pre-recorded text or show a pre-saved image. (I don't need anything else. Just when loading the output of something on the screen)

Actually, the questions I wanted to ask:

• Am I thinking in the right direction? If so, then the next question is:
• How can something like this be built on the linux kernel?