From 91513ced220d63c4d586ce375f4d978674db2487 Mon Sep 17 00:00:00 2001
From: Lior Halphon <LIJI32@gmail.com>
Date: Mon, 20 Feb 2017 14:20:45 +0200
Subject: [PATCH] Minor adjustment to LCD timing after enabling it.

---
 Core/memory.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Core/memory.c b/Core/memory.c
index a22c746..879503a 100644
--- a/Core/memory.c
+++ b/Core/memory.c
@@ -441,7 +441,9 @@ static void write_high_memory(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
 
             case GB_IO_LCDC:
                 if ((value & 0x80) && !(gb->io_registers[GB_IO_LCDC] & 0x80)) {
-                    gb->display_cycles = 0;
+                    /* It appears that there's a slight delay after enabling the screen? */
+                    /* Todo: verify this. */
+                    gb->display_cycles = gb->cgb_double_speed? -2 : -4;
                 }
                 gb->io_registers[GB_IO_LCDC] = value;
                 return;