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8255

168 bytes removed, 13:01, 13 August 2023
Undo revision 111955 by [[Special:Contributions/Phi2x|Phi2x]] ([[User talk:Phi2x|talk]])
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 Amstrad Plus emulates the 8255 in its ASIC chip. But the implementation is quite different and a frequent cause of compatibility issues with Amstrad CPC software.
== The 8255 in the CPC ==
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