Family Computer Disk System: Difference between revisions
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''' | '''fwNES''' was an [[NES emulator]] developed by Fan Wan Yang. Its most lasting contribution to the NES scene was its disk image file format. | ||
== .FDS format == | == .FDS format == | ||
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== References == | == References == | ||
* [http://nesdev.parodius.com/FDSListWIN.zip FDS Lister by ccovell] | * [http://nesdev.parodius.com/FDSListWIN.zip FDS Lister by ccovell] | ||
Revision as of 19:44, 15 March 2010
fwNES was an NES emulator developed by Fan Wan Yang. Its most lasting contribution to the NES scene was its disk image file format.
.FDS format
The FDS format (file name suffix .fds) is a way to store Famicom Disk System disk data. It consists of the following sections, in order:
- Header (16 bytes)
- Disk data (65500 * x bytes)
The format of the header is as follows:
- 0-3: Constant $46 $44 $53 $1A ("FDS" followed by MS-DOS end-of-file)
- 4: Number of disk sides in 65500 byte units
- 5-15: Zero filled
