techlibs/gowin/dram.txt

   1 bram $__GW1NR_RAM16S4
   2   init 1
   3   abits 4
   4   dbits 4
   5   groups 2
   6   ports  1 1
   7   wrmode 0 1
   8   enable 0 1
   9   transp 0 1
  10   clocks 0 1
  11   clkpol 0 1
  12 endbram
  13
  14 match $__GW1NR_RAM16S4
  15   make_outreg
  16   min wports 1
  17 endmatch