MAMEDEV Forum

Posted: **Sun Jan 24, 2021 5:43 pm**

A Z80 test-program for ZX Spectrum Computer can be found under: https://github.com/raxoft/z80test
which performs 152 Tests on Z80-Emulation.

MAME 0.227 fails on two of these tests, as can be read here: https://spectrumcomputing.co.uk/forums/ ... 361#p56361

Maybe someone from the MAMEDEV-Team want to look, why those tests fail.

Posted: **Sun Jan 24, 2021 6:37 pm**

Just for completeness, these are the test, where MAME 0.227 fails:

Maybe only a slight problem coming from emulating a Z80 processor from a special manufacturer SCS instead of ZILOG according to: https://worldofspectrum.org/forums/disc ... scovery/p1
and:
https://spectrumcomputing.co.uk/forums/ ... 067#p11067

"SCF/CCF flags seems to be a little nightmare on CPUs that are not genuine Zilog."

Z80 Test failed on two test under Computer Spectrum Emulation