From 11a72949c8ab4a5b8fa5d7c131b7f36cd0243f52 Mon Sep 17 00:00:00 2001
From: Namonay <thek7995@gmail.com>
Date: Mon, 17 Jun 2024 16:53:41 +0200
Subject: [PATCH] added reserve scrolling

---
 sources/drivers/vga/vga.zig | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sources/drivers/vga/vga.zig b/sources/drivers/vga/vga.zig
index e143686..513135c 100644
--- a/sources/drivers/vga/vga.zig
+++ b/sources/drivers/vga/vga.zig
@@ -52,6 +52,20 @@ fn putEntry(c: u8, color: u8, x: usize, y: usize) void
     vga.buffer[y * vga.width + x] = getVal(c, color);
 }
 
+pub fn reverseScroll() void
+{
+	for (0..(vga.height - 1)) |x|
+	{
+		for (0..vga.width) |y|
+		{
+			vga.buffer[x * vga.width + y] = vga.buffer[(x + 1) * vga.width + y];
+		}
+	}
+	for (0..vga.width) |y|
+	{
+		vga.buffer[y] = 0;
+	}
+}
 pub fn scroll() void
 {
 	for (1..vga.height) |x|