interval timer

Since I'm in a good mood here is most of the logic minus the slave port decoding of the interrupt clearing (note: I just typed this really fast so there could be errors):

input clear_interrupt;
output wire interrupt;
reg  counter;
reg interrupt_reg;
wire set_interrupt_high;
always @ (posedge clk or posedge reset)
begin
     if (reset)
     begin
        counter <= 0;
     end
     else
     begin
        if (set_interrupt_high == 1)
          counter <= 0;
        else
          counter <= counter + 1'b1;
     end
end 
always @ (posedge clk or posedge reset)
begin
     if (reset)
     begin
         interrupt_reg <= 0;
     end
     else
     begin
         if (set_interrupt_high == 1)
             interrupt_reg <= 1;
         else if (clear_interrupt == 1)
             interrupt_reg <= 0;
     end
end
assign set_interrupt_high = (counter == 49999999);
assign interrupt = interrupt_reg;