Those notes are old yes, more like 2008 or so.
I don't know of other NEC vs Zilog differences, but regarding SCF/CCF X/Y flags we definitely emulate the Zilog.

*edit* according to http://www.cpcwiki.eu/forum/technical-support/z80-defective-tests/ it fails on a real Zilog.

Last edited by hap; 04/13/19 06:16 PM.