Yes I'm sure, I had a WIP driver that had major problems, until I did those bugfixes to the CPU emulation.

You can still try.
The DDR4 problem can be worked around with if you do something like this in the driver machine_reset:
m_maincpu->space(AS_PROGRAM).write_byte(0x05, 0xff);

And the illegal opcode fixes, the ones I linked should be easy to copy over to an older MAME.