From 020aafd156ac2839ee105f9c143655c3231e7f5c Mon Sep 17 00:00:00 2001
From: Matthew Berry <me@mattrb.com>
Date: Mon, 14 Mar 2022 17:25:45 -0700
Subject: [PATCH] reset vblank flag at line 227

---
 src/crab/gba/ppu.cr | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/crab/gba/ppu.cr b/src/crab/gba/ppu.cr
index 8e6ecd1..c4d7116 100644
--- a/src/crab/gba/ppu.cr
+++ b/src/crab/gba/ppu.cr
@@ -62,7 +62,7 @@ module GBA
       @vcount = (@vcount + 1) % 228
       @dispstat.vcounter = @vcount == @dispstat.vcount_setting
       @gba.interrupts.reg_if.vcounter = true if @dispstat.vcounter_irq_enable && @dispstat.vcounter
-      if @vcount == 0
+      if @vcount == 227
         @dispstat.vblank = false
       elsif @vcount == 160
         @dispstat.vblank = true