bugfix: NMI will not generate after 2nd times or later

suzukiplan / z80

Single header Z80 emulator for C++ (C++11 or later)

MIT License

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Closed suzukiplan closed 4 years ago

suzukiplan commented 4 years ago

NMI flag did not clear by RETN. This bug was detected while making SEGA Master System emulator (PAUSE button feature).