Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
1) Simplify REFRESH register handling via bit fields. 2) Use static methods in the Z80 emulator, if at all possible 3) Use a decoded opcode lookup, rather than decoding per instruction Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>