Add function that removes a printed character from the screen.

[nicholasbishop]

You can do this by printing a backspace character (numeric value of 8). Here's a simple example, which I tested in both a VM on a Lenovo Thinkpad X1 Carbon:

#![no_main]
#![no_std]

use uefi::prelude::*;
use uefi::print;

#[entry]
fn main() -> Status {
    uefi::helpers::init().unwrap();

    print!("abcdefghijklmnopqrstuvwxyz");

    for _ in 0..26 {
        // Pause briefly.
        boot::stall(500_000);

        // Print backspace character.
        print!("\x08");
    }

    Status::SUCCESS
}

This prints abcdefghijklmnopqrstuvwxyz, then slowly removes characters one at a time.

[Motanescu1357]

for me it does not work.

[Motanescu1357]

Maybe my bios does not implement special characters like backspace.

[nicholasbishop]

Checking a couple things:

1. What specific machine are you testing on?
2. Did you test exactly the code above, or some variation? (I want to make sure we're both testing the exact same thing.)

[Motanescu1357]

I used a ASUS M509 DA laptop with a AMD RYZEN 5 procesor. I tested the same code.