VGA drivers moved to separate files

Author: Retr0-code

OS.iso

@@ -0,0 +1,35 @@
+#include "vga_text_driver.h"
+#include "port_io.h"
+
+uint16_t set_cursor_position(coords _pos)
+{
+    uint16_t offset = _pos.y * VGA_WIDTH + _pos.x;  /*
+        Calculates offset in vga buffer to set cursor
+    */
+    if (_pos.x >= 0 && _pos.y >= 0 && offset < 0x7d0)
+    {
+        pb_out(VGA_CTRL_REGISTER, VGA_HIGH_OFFSET);
+        pb_out(VGA_DATA_REGISTER, (uint8_t)(offset));
+        pb_out(VGA_CTRL_REGISTER, VGA_LOW_OFFSET);
+        pb_out(VGA_DATA_REGISTER, (uint8_t)(offset << 8));
+        return offset;
+    }
+    return 0;
+}
+
+uint8_t color_sum(color_t _c)
+{
+    return _c.bg << 4 | _c.fg; /*
+           0000  | 0000 bits
+            BG      FG
+    */
+}
+
+uint16_t vga_struct(const char _char, color_t _color)
+{
+    return color_sum(_color) << 8 | _char; /*
+    First 8 bits is a color and second bit is a char
+    0000 | 0000 | 00000000
+    BG      FG      Char
+    */
+}