Comment by matheusmoreira
2 years ago
I see. Could it work in protected mode? The OSDev wiki page I linked uses that approach to write to video memory.
> Assuming that you are in protected mode and not using the BIOS to write text to screen, you will have write directly to "video" memory.
I have pretty superficial knowledge about OS development so I should probably refrain from speculating further.
What the OSDev page is describing here:
>> Assuming that you are in protected mode and not using the BIOS to write text to screen, you will have write directly to "video" memory.
... is bypassing the BIOS and interacting directly with hardware. Which is a thing you can do in some circumstances, but it's very limited -- especially if you want to do anything beyond simple console I/O.