From 313850ca84efb0f6a1383e50796ef10721f2b6ad Mon Sep 17 00:00:00 2001
From: greg <elorian.mestec@gmail.com>
Date: Sun, 4 Dec 2016 21:13:31 -0800
Subject: [PATCH] Add file explaining registers

---
 register_notes | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 register_notes

diff --git a/register_notes b/register_notes
new file mode 100644
index 0000000..4c8273e
--- /dev/null
+++ b/register_notes
@@ -0,0 +1,14 @@
+
+
+$2100 - screen on/off + brightness
+
+$2105 - screen format register, changes size of tiles
+
+
+$2121 - stores the index into CGRAM to write a color value via $2122
+
+
+$2122 - write a 2-byte SNES color value to the CGRAM. this auto-increments after writing,
+which is why $2121 needs to be written to reset this. it's common to write `stz $2121`
+
+