From 13ac31004f6c80c7e66b6c9f23a7e17d656714c1 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Thu, 2 Oct 2014 14:20:36 -0400
Subject: comments

---
 test.s | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/test.s b/test.s
index 5b76d03..3814693 100644
--- a/test.s
+++ b/test.s
@@ -121,18 +121,21 @@ turn_red:
 NMI:
   JSR read_controller1
 
+  ; load the sprite into the ppu ports (from $0200)
   LDA #$00
   STA $2003
   LDA #$02
   STA $4014
 
   LDA #$80
-  STA $0200
-  STA $0203
+  STA $0200 ; x position
+  STA $0203 ; y position
+
   LDA #$00
-  STA $0201
+  STA $0201 ; set the sprite number to display
+
   LDA #$00
-  STA $0202
+  STA $0202 ; set the sprite attributes (palette, flipping, etc)
 
   ; if A is not pressed, return
   LDA buttons_pressed.w
-- 
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