Re: INT 14H

[Paul Edwards]

Resending ... I thought I was subscribed, but apparently
I am not.

-----Original Message----- 
From: Paul Edwards 
Sent: Tuesday, June 29, 2021 9:00 AM 
To: [e-mail] 
Subject: Re: INT 14H

Hi Peter.

Thanks for your reply.
> Sure. Implement a driver for that redirection which behaves as an
> int14h handler and place the address of its entry point at address
> 0000:0080. (14h*4)
> The method works with any BIOS.

I would like it to work with any OS that uses INT 14H
(regardless of how many of those exist), rather than
any BIOS.

For now I am happy if it only works with SeaBIOS, and
I will simply buy a PC that allows me to flash SeaBIOS
onto it.

Other manufacturers can do other things with INT 14H,
redirecting it to some other device, such as HAM radio.
> If suitable for your hardware you could do all of it in an option ROM.

I'm not familiar with this terminology. Is this something
that goes into SeaBIOS? I'm expecting it to be something
that is set up (and even configured by the end user in the
BIOS) before my OS is even loaded.

Thanks. Paul.