2 files changed, 20 insertions, 2 deletions
diff --git a/kernel/io/vga/text_mode_display.c b/kernel/io/vga/text_mode_display.c
index bfee909..db0e028 100644
--- a/kernel/io/vga/text_mode_display.c
+++ b/kernel/io/vga/text_mode_display.c
@@ -4,7 +4,7 @@
 #define ROWS 25
 #define FRAME_SIZE (ROWS * COLS)
 
-char *video_ram = (char *)0xB8000;
+char *video_ram = (char *) 0xB8000;
 int cursor_pos = 0;
 int char_attribute_byte = 0x07;
 
@@ -45,4 +45,20 @@ void vga_print_raw(unsigned char byte)
 {
   video_ram[cursor_pos++] = byte;
   video_ram[cursor_pos++] = char_attribute_byte;
+}
+
+// TODO - jump cursor to prev non 0 text char rather than reversing through whole array
+void vga_backspace()
+{
+  if (cursor_pos != 0) 
+  {
+    video_ram[--cursor_pos] = char_attribute_byte;
+    video_ram[--cursor_pos] = 0;
+  }
+}
+
+void vga_newline()
+{
+  int current_line = cursor_pos / COLS;
+  cursor_pos = (current_line + 1) * COLS;
 }
 \ No newline at end of file
diff --git a/kernel/io/vga/text_mode_display.h b/kernel/io/vga/text_mode_display.h
index 48bae85..6c46185 100644
--- a/kernel/io/vga/text_mode_display.h
+++ b/kernel/io/vga/text_mode_display.h
@@ -2,4 +2,6 @@ void vga_clear_screen();
 void vga_print(char *msg);
 void vga_print_ln(char *msg);
 void vga_set_text_colour(int foreground, int background);
-void vga_print_raw(unsigned char byte);
-\ No newline at end of file
+void vga_print_raw(unsigned char byte);
+void vga_backspace();
+void vga_newline();
+\ No newline at end of file