There r some requirements of the board. If we can sqeeze out the
maximum performance from the parallel port the better. We are involved
in BIDIRECTIONAL TRANSFER HERE.
Fine - you're involved in bi-directional transfer - of what data? If you
actually posted the requirements of the board then perhaps we could help.
Without knowing what the actual I/O data requirements are ... (i.e. WHAT you
are transferring - or what you want to do with it)
If you insist on your refusal to post this information - use an ASIC and
figure it out yourself