> Do you have 5 volt I/O with the OberonStaion FPGA? > I was thinking of using it as general FPGA card. No, the FPGA pins are neither 5V, nor 5V-tolerant. The last Xilinx FPGA that had 5V-tolerant I/O was the Spartan II. Xilinx does still make CPLDs that are 5V-tolerant, the XC95nnXL series.