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README: correct creation year and shell escapes, clarify readByte.

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Piotr Fusik 2013-10-02 11:12:29 +02:00
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README.md
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@ -4,7 +4,7 @@
[DEFLATE](http://en.wikipedia.org/wiki/DEFLATE) is a popular compression format, [DEFLATE](http://en.wikipedia.org/wiki/DEFLATE) is a popular compression format,
used in ZIP, gzip, PNG and many other formats. used in ZIP, gzip, PNG and many other formats.
In 2001 I wrote a DEFLATE decompression routine (called "inflate") In 2000 I wrote a DEFLATE decompression routine (called "inflate")
in the [6502](http://en.wikipedia.org/wiki/6502) assembly language. in the [6502](http://en.wikipedia.org/wiki/6502) assembly language.
In 2007 I optimized it so it is about 30% shorter and 10% faster than before. In 2007 I optimized it so it is about 30% shorter and 10% faster than before.
@ -19,7 +19,9 @@ The routine uses three memory areas:
You must select these locations at compile time, for example: You must select these locations at compile time, for example:
xasm -d inflate="$b700" -d inflate_data="$b900" -d inflate_zp="$f0" inflate.asx xasm -d inflate=$b700 -d inflate_data=$b900 -d inflate_zp=$f0 inflate.asx
(escape the dollars if in Unix shell or Makefile).
Source code uses [xasm](https://github.com/pfusik/xasm) syntax. Source code uses [xasm](https://github.com/pfusik/xasm) syntax.
This cross-assembler includes many original syntax extensions. This cross-assembler includes many original syntax extensions.
@ -41,7 +43,7 @@ uncompressed can be stored in place of some compressed data which has been
already read. already read.
It is also possible to get the compressed data from any forward-only stream. It is also possible to get the compressed data from any forward-only stream.
In this case, modify the `getBit` routine to look like this: In this case, modify the `getBit` routine to use your `readByte`:
getBit getBit
lsr getBit_buffer lsr getBit_buffer
@ -99,7 +101,7 @@ License
This code is licensed under the standard zlib license. This code is licensed under the standard zlib license.
Copyright (C) 2001-2013 Piotr Fusik Copyright (C) 2000-2013 Piotr Fusik
This software is provided 'as-is', without any express or implied This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages warranty. In no event will the authors be held liable for any damages