techlibs/xilinx/xcup_urams.txt

bram $__XILINX_URAM288
  init 0
  abits 12
  dbits 72
  groups 2
  ports  1 1
  wrmode 0 1
  enable 1 9
  transp 0 0
  clocks 2 2
  clkpol 2 2
endbram

match $__XILINX_URAM288
  min bits 131072
  min efficiency 15
  shuffle_enable B
  make_transp
endmatch