Peter C. Wallace wrote: > With the 9805, I can see that the strobe ends in response to my wait signal, > but the data is sampled somewhere around the falling (leading) edge of the > strobe. I thought about an error caused by the port seeing /wait asserted too > early so even tried putting a fair sized cap at the parallel port end of > /wait, this slowed the handshake, but did not help reading tha data at the > right time. Only way I could thnk of making the NetMos cards read right is by > supplying read data when READ is high, but thats too ugly (bus conflicts etc) > to consider seriously. > > I wonder if this is an EPP 1.7 version of the chip? I think what you are talking about is similar to the 1.7/1.9 difference. The date code on my chip seems too late to be 1.7, 2003. It is an NM9805CV. But, I suspect it is popped, I couldn't get it to do anything.
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