trying to fix the drivers and also the isr, gdt and isr header files.

src/drivers/screen/screen.c

@@ -1,27 +1,63 @@
 #include "screen.h"
-#include <dos.h>
 
-void screen_init() {
-    // Initialize the screen driver
-    // Add any necessary initialization code here
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// Video memory address
+#define VIDEO_MEMORY_ADDRESS 0xB8000
+
+// Screen attributes (color)
+static uint8_t screen_color =
+    (SCREEN_COLOR_LIGHT_GRAY << 4) | SCREEN_COLOR_BLACK;
+
+// Helper function to calculate the screen buffer offset
+static inline uint16_t screen_offset(uint8_t x, uint8_t y)
+{
+    return (y * SCREEN_WIDTH + x) * 2;
 }
 
-void set_40_column_mode() {
-    // Set the screen mode to 40 columns
-    union REGS regs;
-    regs.h.ah = 0x00;
-    regs.h.al = 0x03;
-    int86(0x10, &regs, &regs);
+// Initialize the screen driver
+void screen_init()
+{
+    // No initialization required for this simple driver
 }
 
-void set_80_column_mode() {
-    // Set the screen mode to 80 columns
-    union REGS regs;
-    regs.h.ah = 0x00;
-    regs.h.al = 0x03;
-    int86(0x10, &regs, &regs);
+// Clear the screen
+void screen_clear()
+{
+    uint16_t *video_memory = (uint16_t *)VIDEO_MEMORY_ADDRESS;
+    for (int i = 0; i < SCREEN_WIDTH * SCREEN_HEIGHT; i++)
+    {
+        video_memory[i] = ' ' | (screen_color << 8);
+    }
+}
 
-    regs.h.ah = 0x00;
-    regs.h.al = 0x07;
-    int86(0x10, &regs, &regs);
+// Set the foreground and background colors
+void screen_set_color(uint8_t foreground, uint8_t background)
+{
+    screen_color = (background << 4) | foreground;
+}
+
+// Print a character at the specified position
+void screen_put_char(char c, uint8_t x, uint8_t y)
+{
+    uint16_t *video_memory = (uint16_t *)VIDEO_MEMORY_ADDRESS;
+    uint16_t  offset       = screen_offset(x, y);
+    video_memory[offset]   = c | (screen_color << 8);
+}
+
+// Print a null-terminated string at the specified position
+void screen_put_string(const char *str, uint8_t x, uint8_t y)
+{
+    uint16_t *video_memory = (uint16_t *)VIDEO_MEMORY_ADDRESS;
+    uint16_t  offset       = screen_offset(x, y);
+    while (*str)
+    {
+        video_memory[offset] = *str | (screen_color << 8);
+        str++;
+        offset += 2;
+    }
 }

src/drivers/screen/screen.h

@@ -1,13 +1,47 @@
 #ifndef SCREEN_H
 #define SCREEN_H
 
-// Function to initialize the screen driver
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// Screen dimensions
+#define SCREEN_WIDTH  80
+#define SCREEN_HEIGHT 25
+
+// Screen colors
+#define SCREEN_COLOR_BLACK         0
+#define SCREEN_COLOR_BLUE          1
+#define SCREEN_COLOR_GREEN         2
+#define SCREEN_COLOR_CYAN          3
+#define SCREEN_COLOR_RED           4
+#define SCREEN_COLOR_MAGENTA       5
+#define SCREEN_COLOR_BROWN         6
+#define SCREEN_COLOR_LIGHT_GRAY    7
+#define SCREEN_COLOR_DARK_GRAY     8
+#define SCREEN_COLOR_LIGHT_BLUE    9
+#define SCREEN_COLOR_LIGHT_GREEN   10
+#define SCREEN_COLOR_LIGHT_CYAN    11
+#define SCREEN_COLOR_LIGHT_RED     12
+#define SCREEN_COLOR_LIGHT_MAGENTA 13
+#define SCREEN_COLOR_YELLOW        14
+#define SCREEN_COLOR_WHITE         15
+
+// Initialize the screen driver
 void screen_init();
 
-// Function to set the screen mode to 40 columns
-void set_40_column_mode();
+// Clear the screen
+void screen_clear();
 
-// Function to set the screen mode to 80 columns
-void set_80_column_mode();
+// Set the foreground and background colors
+void screen_set_color(uint8_t foreground, uint8_t background);
+
+// Print a character at the specified position
+void screen_put_char(char c, uint8_t x, uint8_t y);
+
+// Print a null-terminated string at the specified position
+void screen_put_string(const char *str, uint8_t x, uint8_t y);
 
 #endif

src/drivers/tty/tty.c

@@ -0,0 +1,36 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../display.h"
+#include "../interrupts.h"
+#include "../io/io.h"
+#include "../keyboard.h"
+#include "../string.h"
+#include "./screen/screen.h"
+
+#include "./tty.h"
+
+// Function definitions
+
+// Example function to print a message to the console
+void tty_print(const char *message)
+{
+    printf("%s", message);
+}
+
+// Example function to read input from the console
+void tty_read(char *buffer, size_t size)
+{
+    fgets(buffer, size, stdin);
+}
+
+// Example function to clear the console
+void tty_clear()
+{
+    printf("\033[2J\033[H");
+}
+
+// More function definitions...

src/drivers/tty/tty.h

@@ -0,0 +1,12 @@
+#ifndef TTY_H
+#define TTY_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+// Function declarations
+
+#endif // TTY_H