Interfaces that use other chipset or other I/O ports as than Amstrad's official interface - these interfaces aren't compatible with the standard Amstrad interface (nor are they compatible with each other):
* [[Albireo]] (serial port interface with USB device converter built-in, for link with another computer)
* [[Aleste 520EX]] (a CPC clone with built-in RS232, intended for serial mouse)
* [[AMSSIO]] (RS232 interface) (DIY)