Changes
8255
,/* 8255 Part numbers used in the CPC during its lifetime */
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.
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.
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