* Toshiba TMP8255AP-5 [https://www.cpcwiki.eu/imgs/0/0d/CPC464_Z70100_MC0001A_PCB_Top.jpg Source]
All of these are almost identical in their operation. It According to Kevin Thacker, it is possible to detect each version by writing and then reading from the ppi control i/o port. Each can give a different pattern of values that are read back.
The KP580BB55A is a Soviet clone of the Intel i8255. It is used in the [[KC Compact]] and the [[Aleste 520EX]] clones of the Amstrad CPC computer.