// parameter FPGA_VERSION = 32'h03930066; // trying just one histogram to watch utilization - with 4 was: Slice 15913 (80.98%), now Slice = 14318 (72.87%)
// parameter FPGA_VERSION = 32'h03930066; // trying just one histogram to watch utilization - with 4 was: Slice 15913 (80.98%), now Slice = 14318 (72.87%)