Ok its a timing problem. The 2691 calls for RDN to go low with CEN low if I do both at the same time it doesn't work. I asked for a quote from some obsolete parts places for going back to R6551. The one quote back from 4STAR $20. With all this work for obsolete parts I think I will just go with some...

Has anyone got one of these wired up and programed on a C64 or C128?
I can enable chip and write(WRN), but the read enable(RDN) is not simple thing to get working.
I am trying to connect directly to buss. I don't want to go thru an interface chip to talk to this interface chip.
thank you