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cursor is now the real VGA buffer cursor

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This commit is contained in:
Jack Halford 2018-02-13 14:35:17 +01:00
parent bd86aae536
commit 6598cbe3eb
1 changed files with 6 additions and 11 deletions
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17
kernel-rs/src/vga/buffer.rs
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@ -9,6 +9,7 @@
use super::{Color, ColorCode};
use ::context::CONTEXT;
use cpuio;
#[derive(Debug, Clone, Copy)]
#[repr(C)]
@ -34,13 +35,8 @@ pub fn print(args: fmt::Arguments) {
unsafe { CONTEXT.current_term().flush() };
}
extern crate core;
// pub const unsafe fn vga_slice() -> &'static [u8] {
// unsafe { core::slice::from_raw_parts_mut(0xb8000 as *mut u8, 4000) }
// }
const BUFFER_ROWS: usize = 25;
const BUFFER_COLS: usize = 80 * 2;
@ -70,8 +66,6 @@ impl Writer {
match byte {
b'\n' => {
//reset cursor
self.buffer[self.position + 1] = ColorCode::new(Color::White, Color::Black).0;
let current_line = self.position / (BUFFER_COLS);
self.position = (current_line + 1) * BUFFER_COLS;
}
@ -86,10 +80,11 @@ impl Writer {
self.scroll();
}
// cursor
self.buffer[self.position] = b' ';
self.buffer[self.position + 1] = ColorCode::new(Color::LightGray, Color::LightGray).0;
let cursor_position = self.position / 2;
cpuio::outb(14, 0x3D4);
cpuio::outb((cursor_position >> 8) as u8, 0x3D5);
cpuio::outb(15, 0x3D4);
cpuio::outb((cursor_position >> 0) as u8 & 0x00ff, 0x3D5);
}
pub fn flush(&mut self) {