== I/O Port Address ==
The project is rather unclear about the recommended I/O address: The Decoder's (used in the CPC example source code uses ) is Port F8F0h(ie. However, shorten Link 1 on the [[Maplins 8bit Input Port project (which is, among others, explicitely intended for use with the Decoder]]) does use Port F8Exh.
The decoder outputs some control signals and an 8bit luminance signal. That data can't be squeezed through the 8bit input port, so some of the luminance bits are left unconnected (the CPC's color palette couldn't display them anyways).