* ([[RS232|overview of RS232 interfaces]])
* [[Albireo]] (serial to USB on-board) ([[PulkoTronics]] / DIY)
* [[Aleste 520EX]] (a CPC clone with built-in RS232, intended for serial mouse) ([[Patisonic]])
* [[AMSSIO]] (four different versions) (RS232 interface) (DIY) (Martin Zacho)