The Z380 is a Zilog 16-bit/32-bit processor from 1994. It is Z80 compatible, but it was released much later than its competitors (the Intel 386 and Motorola 68020) and as a result was never able to gain any significant market leverage. On the other hand, the newer and faster eZ80 family has been more successful recently (as of 2005[update]).
The Z380 is incompatible with Zilog's older Z800 and Z280. As the Z380 is derived from the newer Z180 it is a less mini computer like design than these older processors, with fewer features. Instead it has a wider ALU and register length of 32-bits. It can therefore address 4 GB directly:
- Similar pipelined execution or fetch/execute overlap as the Z280
- Simpler MMU, without memory protection.
- Minimum of 2 clocks/instruction. This is like the Z280, but also for 32 bit operations.
- No on-chip cache, as it is redundant with the faster static RAMs of the 1990s and onwards.
- Lacks the I/O trap feature