Some speed advantage (about 70ns or 25%) may be gained by defeating the
parity logic in the PCL/ADI. This may be done by disconnecting the PA and PE
segment transceivers, and grounding BPE via a resistor (suggested
value 2.2k
). ICP
may also be grounded. The resistor is
required (rather than a direct connection to ground) since BPE is asserted by
the PCL during Read cycles.
It is still necessary to connect OCP of the lower
ADI to BGPC
of the
higher
ADI as this
signal is also used for NTA increment over the 16-bit boundary.