[[Image:Amstrad RS232.jpg|right|thumb|250px|The Pace RS232 interface , as sold by Amstrad]]
A [[RS232Amstrad]] interface by released two [[AmstradRS232]]interfaces, both using the same input/output addresses - thereby establishing the standard for serial interfaces - but with significantly different hardware. == Original serial interface == Amstrad's first serial interface was one of the original peripherals released for the CPC. It was remarkable (in a bad way) for the necessity for an external, brick-like power supply. Software was supplied on ROM, mostly comprising utility RSXs for hobbyists rather than a comms application per se. == Pace serial interface == Commstar Software is supplied on rom!
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