On Nov 25, 23:44, Allison J Parent wrote:
> Front pannels don't work with Z80s if... DRAM depends on the z80 for
> refresh. Reason is the stopped state is a very long wait state.
Do you mean if you execute a HALT instruction? If you do that, the Z80
behaves as if it's continuously executing HALT instructions, performing
repeated bus cycles, including the RFSH signal part.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Thu Nov 26 1998 - 01:57:15 GMT