Does the BIOS set up the IVT at the start of RAM for handling real mode interrupts?

Question about which tools to use, bugs, the best way to implement a function, etc should go here. Don't forget to see if your question is answered in the wiki first! When in doubt post here.
Post Reply
karim
Posts: 7
Joined: Mon Jun 23, 2025 8:03 pm

Does the BIOS set up the IVT at the start of RAM for handling real mode interrupts?

Post by karim »

oes the BIOS put the interrupt vectors in the IVT at the beginning of RAM? So, when an interrupt occurs, the CPU looks up the IVT table to find the code that handles this interrupt, like int 0x10?
And is this IVT table specifically made by the BIOS for use in real mode is what i said is right?"
Top
Octocontrabass
Member
Member
Posts: 5873
Joined: Mon Mar 25, 2013 7:01 pm

Re: Does the BIOS set up the IVT at the start of RAM for handling real mode interrupts?

Post by Octocontrabass »

Assuming legacy BIOS or UEFI CSM, yes.

Your question seems familiar.
Top
karim
Posts: 7
Joined: Mon Jun 23, 2025 8:03 pm

Re: Does the BIOS set up the IVT at the start of RAM for handling real mode interrupts?

Post by karim »

it is not me
Top
Post Reply

Return to “OS Development”