Thx CosmicR,
for get NeoPhoenix to run fullspeed there are only two solutions:

1.Hack the PHOENIX original code. I have already made it with some good results but still far from final target (You'll see in the next release)
2.Rewrite in 68K Assembler the C macro Z80 emulator, Ex.

C (some emu macro I use):#define M_POP(Rg) \ R.Rg.D=M_RDSTACK(R.SP.D)+(M_RDSTACK((R.SP.D+1)&65535)<<8); \ R.SP.W.l+=2 #define M_PUSH(Rg) \ R.SP.W.l-=2; \ M_WRSTACK(R.SP.D,R.Rg.D); \ M_WRSTACK((R.SP.D+1)&65535,R.Rg.D>>8) #define M_CALL \ { \ int q; \ q=M_RDMEM_OPCODE_WORD(); \ M_PUSH(PC); \ R.PC.D=q; \ Z80_ICount-=7; \ }


68K ???