Added text cursor enable and disable

src/kernel/main.c

@@ -16,6 +16,7 @@ void main() {
     setupKeyboard();
     setupTimer();
     timerPhase(100); // 1 tick per 10ms
+    enableCursor(14, 15);
 
     clear(0x0f);
     print("kern.\n\n", 0x0f);

src/kernel/screen.c

@@ -1,5 +1,6 @@
 #include "screen.h"
 #include "stdint.h"
+#include "system.h"
 
 uint16_t cursor = 0;
 
@@ -79,3 +80,16 @@ uint16_t calcOffset(uint8_t col, uint8_t row) {
     return row * COLS + col;
 }
 
+void enableCursor(uint8_t start, uint8_t end) {
+    outb(0x3d4, 0x0a); // Sending cursor start
+    outb(0x3d5, (inb(0x3d5) & 0xc0) | start);
+
+    outb(0x3d4, 0x0b); // Sending cursor end
+    outb(0x3d5, (inb(0x3d5) & 0xe0) | end);
+}
+
+void disableCursor() {
+    outb(0x3d4, 0x0a);
+    outb(0x3d4, 0x0b);
+}
+

src/kernel/screen.h

@@ -14,8 +14,6 @@
 #define COLS 80
 #define CHARS (ROWS*COLS)
 
-#define CURSOR '_'
-
 void putc(char c, uint8_t attr);
 void print(char* s, uint8_t attr);
 void putcAt(char c, uint8_t attr, uint8_t row, uint8_t col);
@@ -27,7 +25,7 @@ void setCursorPos(uint16_t offset);
 uint16_t getCursorPos();
 uint16_t calcOffset(uint8_t row, uint8_t col);
 
-void setCursorChar(char cursor);
-char getCursorChar();
+void enableCursor(uint8_t start, uint8_t end);
+void disableCursor();
 
 #endif