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Re: help decoding address fields

Subject: Re: help decoding address fields
From: Andy McFadden <fadden@fadden.com>
Date: 19 Jan 2008 06:17:52 GMT
Newsgroups: comp.sys.apple2
Organization: faddenInternet, Inc.
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jonnosan <jonnosan@gmail.com> wrote:
> I am looking to extend my dsk parsing code to deal with .nib images.
> I'm having some problems trying to understand how the nibble encoding
> works.

Some C++ code for sector decoding and encoding:

http://ciderpress.cvs.sourceforge.net/ciderpress/CiderPress/diskimg/Nibble.cpp?revision=1.1.1.1&view=markup

See DiskImg::DecodeAddr() and the ConvFrom44() inline function declared in
the header file:

http://ciderpress.cvs.sourceforge.net/ciderpress/CiderPress/diskimg/DiskImg.h?revision=1.1.1.1&view=markup


These were created by figuring out what the DOS 3.2/3.3 RWTS routines did.

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References:
- help decoding address fields
  - From: jonnosan <jonnosan@gmail.com>

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