< But just tell me where 32 Bit instructions can be usefull ? < In fact, I can't think of any part inside a BASIC. But the < higher clockrates are a nice thing - and maybe the z180 for < 3.0 style bankswitching. They can address the full 32bit address space (without banking) and the z380 adds a host of addressing modes not in the z80 like 32bit indirect, PC relative and stack relative with long pointers. Also MUL, DIV and a handfull of other nice instructions that would sharply speed on the math functions. Also there are 4 sets of registers compared to the dual set of the z80/z180. Allison