Xilinx 8.1 & Xilinx 14.7 Version will not compile my design

[loumbut5]

Hi.

I designed the processor DorQ which is attached. It compiles fine in Quartus 2 but my business partners use Xilinx 8.1 & Xilinx 14.7 Version and on these software, it shows errors which are also attached to this thread.
Could someone please provide a solution to this problem. Is there a setting we can change on Xilinx 8.1 & Xilinx 14.7 Version that will do away with the error messages.
Thanks for your reply.

[gszakacs]

There are no internal tristate buffers in the newer Xilinx devices.  You could try to target a Spartan II part instead and see if it can pass synthesis, however the real solution would be to redesign the logic so that the ports are not all bidirectional.