Changes
8255
,/* 8255 Part numbers used in the CPC during its lifetime */
== 8255 Part numbers used in the CPC during its lifetime ==
* Mitsubishi M5L8255AP-5 [https://www.cpcwiki.eu/imgs/8/80/MC0001A-v2-components.jpg Source]* NEC D8255AC-2[https://www.cpcwiki.eu/imgs/d/da/Amstrad_CPC464_Z70200_MC0003A_PCB_Top.jpg Source]* NEC D8255AC-5[https://www.cpcwiki.eu/imgs/c/c6/CPC464_270100_MC0001A_PCB_Top.jpg Source]* 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 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.
