From 7e5cf3ca48082015636fd34e46bbb522b082b35e Mon Sep 17 00:00:00 2001
From: Safiire <safiire@gmail.com>
Date: Fri, 27 Mar 2015 16:33:53 -0700
Subject: [PATCH] Updating sound engine source with minor changes

---
 README.md                                    |   2 +-
 {github_images => images}/assembler_demo.png | Bin
 sound_engine.asm => music_driver.asm         |  10 ++++++----
 3 files changed, 7 insertions(+), 5 deletions(-)
 rename {github_images => images}/assembler_demo.png (100%)
 rename sound_engine.asm => music_driver.asm (95%)

diff --git a/README.md b/README.md
index eaa0d0e..f0a823c 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ An NES assembler for the 6502 microprocessor written in Ruby
   on the NES.
 
 
-  ![Scrolling NES Demo](github_images/assembler_demo.png)
+  ![Scrolling NES Demo](images/assembler_demo.png)
 
 # Some new additions:
   - First version of Midi to NES music converter
diff --git a/github_images/assembler_demo.png b/images/assembler_demo.png
similarity index 100%
rename from github_images/assembler_demo.png
rename to images/assembler_demo.png
diff --git a/sound_engine.asm b/music_driver.asm
similarity index 95%
rename from sound_engine.asm
rename to music_driver.asm
index 5257bc1..37d1422 100644
--- a/sound_engine.asm
+++ b/music_driver.asm
@@ -1,5 +1,5 @@
 ;------------------------------------------------------------------------------
-;  An NES sound engine that understands the binary stream outputted from my
+;  An NES music engine that understands the binary stream outputted from my
 ;  MIDI converter :)
 ;;;;
 ;  Create an iNES header
@@ -15,8 +15,11 @@
 ;  Let's put a data structure to control the sound engine in the zero page
 .org $0000
 .scope sound_engine
+  ;  Where we are reading from ROM
   .space stream_read_ptr_lo 1
   .space stream_read_ptr_hi 1
+
+  ;  Where we are writing in the APU
   .space stream_write_ptr_lo 1
   .space stream_write_ptr_hi 1
   .space delta 1
@@ -78,11 +81,10 @@
 
   ;  Initialize sound engine structure
   ;  To read from $D000, and to write to $40**
-  lda #$D0
+  lda #>music_buffer
   sta sound_engine.stream_read_ptr_hi
-  lda #$00
+  lda #<music_buffer
   sta sound_engine.stream_read_ptr_lo
-  sta sound_engine.stream_write_ptr_lo
 
   ; Make the first delta happen immediately
   lda #$01