gcram.v

   1 module GCRAM
   2 (input clk, input we, input[12:0] addr, input[15:0] di, output reg [15:0] do);
   3    reg [15:0] mem [4095:0];
   4
   5    always @ (negedge clk)
   6          do <= #1 mem[addr];
   7
   8    always @ (negedge clk)
   9          if (we)
  10            mem[addr] <= #1 di;
  11
  12    initial begin
  13           mem[ 0] <= 0;                     // (cdr part of NIL)
  14           mem[ 1] <= 0;                     // (car part of NIL)
  15           mem[ 2] <= 16'b0010000000000000;  // (cdr part of T)
  16           mem[ 3] <= 16'b0010000000000000;  // (car part of T)
  17           mem[ 4] <= 16'd12;                // (free storage pointer)
  18           mem[ 5] <= 16'b1100000000000111;  // CALL 7
  19           mem[ 6] <= 0;                     // (result of computation)
  20           mem[ 7] <= 16'b0000000000001001;  // MORE 9
  21           mem[ 8] <= 16'b0010000000000101;  // NUMBER 5
  22           mem[ 9] <= 16'b1110000000000000;  // FUNCALL NIL
  23           mem[10] <= 16'b1000000000001011;  // PROC 11
  24           mem[11] <= 16'b0101111111111110;  // VAR -2
  25    end
  26 endmodule