From 9ac3a2b8627d5789e8201b1d15899b61292b089b Mon Sep 17 00:00:00 2001
From: Gregory Bowne <gbowne144@gmail.com>
Date: Mon, 10 Nov 2025 05:19:25 -0800
Subject: [PATCH] Update terminal.c

Fixed minor issue with terminal
---
 kernel/terminal.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/terminal.c b/kernel/terminal.c
index 180b12a..f2bec77 100644
--- a/kernel/terminal.c
+++ b/kernel/terminal.c
@@ -12,6 +12,7 @@ static uint16_t* const vga_buffer = (uint16_t*) VGA_ADDRESS;
 static uint8_t cursor_x = 0;
 static uint8_t cursor_y = 0;
 static uint8_t current_color = WHITE_ON_BLACK;
+static uint16_t last_cursor_pos = 0xFFFF;
 
 void terminal_initialize(void) {
     for (uint16_t y = 0; y < VGA_HEIGHT; y++) {
@@ -96,8 +97,10 @@ void terminal_clear(void) {
     update_cursor();
 }
 
-void update_cursor() {
+void update_cursor(void) {
     uint16_t pos = cursor_y * VGA_WIDTH + cursor_x;
+    if (pos == last_cursor_pos) return;
+    last_cursor_pos = pos;
 
     outb(0x3D4, 0x0F);
     outb(0x3D5, (uint8_t)(pos & 0xFF));