Shorten the code by one byte.

README.md

@@ -11,9 +11,11 @@ In 2007 I optimized it so it is about 30% shorter and 10% faster than before.
 Compilation
 -----------
 
+Use [xasm](https://github.com/pfusik/xasm).
+
 The routine uses three memory areas:
 
-* `inflate` - code and initialized data (509 bytes)
+* `inflate` - code and initialized data (508 bytes)
 * `inflate_data` - uninitialized data (764 bytes)
 * `inflate_zp` - variables on zero page
 
@@ -23,15 +25,12 @@ You must select these locations at compile time, for example:
 
 (escape the dollars if in Unix shell or Makefile).
 
-Source code uses [xasm](https://github.com/pfusik/xasm) syntax.
-This cross-assembler includes many original syntax extensions.
-
 Usage
 -----
 
-The `inflate` routine assumes that the compressed and uncompressed data fit
+The `inflate` routine assumes that the compressed and the uncompressed data
-in the memory. Before calling `inflate` set the locations of compressed
+fit in the memory. Before calling `inflate`, set the locations
-and uncompressed data in zero-page variables:
+of the compressed and the uncompressed data in the zero-page variables:
 
     mwa #compressedData inflate_zp
     mwa #uncompressedData inflate_zp+2
@@ -69,8 +68,8 @@ which used the standard [zlib library](http://www.zlib.net/).
 However, better compression can be obtained with [7-Zip](http://7-zip.org/).
 It supports the gzip format which is a thin layer on top of DEFLATE.
 My program `gzip2deflate` extracts the DEFLATE stream from a gzip file.
-It reads gzip on standard input and writer DEFLATE to standard output.
+It reads gzip on its standard input and writes DEFLATE to its standard output.
-I recommend using it like this:
+I recommend using it this way:
 
     7z a -tgzip -mx=9 -so dummy INPUT_FILE | gzip2deflate >OUTPUT_FILE.dfl
 
@@ -80,11 +79,11 @@ If you don't have 7-Zip, use:
 
 If you are looking for maximum compression, [KZIP](http://advsys.net/ken/utils.htm)
 is also worth a try. It creates ZIP files, so I wrote `zip2deflate` to extract
-DEFLATE data from ZIP.
+DEFLATE data from a ZIP.
 
 Windows binaries of `gzip2deflate` and `zip2deflate` are
 [available for download](http://pfusik.github.io/zlib6502/2deflate.zip).
-For other platforms you will need to compile these programs yourself.
+For other platforms, you will need to compile these programs yourself.
 
 zlib?
 -----
@@ -92,7 +91,7 @@ zlib?
 This project is named zlib6502, but only supports DEFLATE decompression.
 Someday I'm going to include more functions, including compression.
 
-Meanwhile, you may look at [cc65](https://github.com/oliverschmidt/cc65) `zlib.h`.
+Meanwhile, you may look at [cc65](https://github.com/cc65/cc65) `zlib.h`.
 This is my old code, which includes an old version of `inflate`
 plus zlib-compatible `uncompress`, `adler32` and `crc32`.
 
@@ -101,7 +100,7 @@ License
 
 This code is licensed under the standard zlib license.
 
-Copyright (C) 2000-2013 Piotr Fusik
+Copyright (C) 2000-2017 Piotr Fusik
 
 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages

inflate.asx

@@ -1,10 +1,10 @@
 ; inflate - uncompress data stored in the DEFLATE format
 ; by Piotr Fusik <fox@scene.pl>
-; Last modified: 2007-06-17
+; Last modified: 2017-02-07
 
 ; Compile with xasm (http://xasm.atari.org/), for example:
 ; xasm inflate.asx /l /d:inflate=$b700 /d:inflate_data=$b900 /d:inflate_zp=$f0
-; inflate is 509 bytes of code and initialized data
+; inflate is 508 bytes of code and initialized data
 ; inflate_data is 764 bytes of uninitialized data
 ; inflate_zp is 10 bytes on page zero
 
@@ -349,9 +349,10 @@ fetchCode_nextBit
 	clc
 	rts
 fetchCode_control
-	add	nBitCode_controlOffset-1,x
+;	sec
+	adc	nBitCode_controlOffset-1,x
 	tax
-	lda	codeToControlSymbol,x
+	lda	codeToControlSymbol-1,x
 	sec
 	rts
 
@@ -405,6 +406,7 @@ copyByte
 	ldy	#0
 ; Write a byte
 storeByte
+;	ldy	#0
 	sta	(outputPointer),y
 	inc	outputPointer
 	bne	storeByte_return