From 2e8244f0cf634f126b783832bbc8342344c144e1 Mon Sep 17 00:00:00 2001
From: JakeBreath <tolozacdcmo@gmail.com>
Date: Mon, 10 Aug 2026 22:36:13 -0500
Subject: [PATCH] fixed PPU scroll issue

---
 src/main.rs | 2 +-
 src/ppu.rs  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index af94f23..f4e70a2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -79,7 +79,7 @@ fn run_dbg(path: &str) {
     cpu.reset(&mut bus);
     let mut dumper = dump::Dumper::new();
     let mut renderer = PpmRenderer::new();          // <-- add this
-    let frames: u32 = 360;
+    let frames: u32 = 1800;
 
     for f in 0..frames {
         while !bus.frame_done() {
diff --git a/src/ppu.rs b/src/ppu.rs
index b6f9f2a..f88e95d 100644
--- a/src/ppu.rs
+++ b/src/ppu.rs
@@ -179,7 +179,7 @@ impl Ppu {
 
     pub fn write(&mut self, cart: &mut Cartridge, addr: u16, val: u8) {
         match addr & 0x2007 {
-            0x2000 => self.ctrl = val,
+            0x2000 => { self.ctrl = val; self.t = (self.t & !0x0C00) | (((val & 0x03) as u16) << 10); },
             0x2001 => self.mask = val,
             0x2002 => {}                 // write ignored
             0x2003 => self.oamaddr = val,