<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This artikel article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].''''' </center></div>
= ".CPR" CPC Plus Cartridge file data structure =
The file structure used is "RIFF" (Resource Interchange File Format).
== Outline of the basic RIFF file structure ==
A RIFF file is constructed of "chunks".
The file begins with a "RIFF" chunk. This chunk contains a 4-byte "form-type" which identifies the file sub-type, followed by the remaining chunks in the file. The RIFF chunk is a container for all the remaining chunks in the file, therefore the length of the RIFF chunk data is equivalent to the total size of the file excluding the length of the header for the RIFF chunk.
== ".CPR" specific file structure ==
The .CPR file uses the "Ams!" form-type.