25 Nov
1998
25 Nov
'98
5:57 p.m.
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