Engine driven hydraulic pumps are sized to provide full rated flow and pressure at or below engine idle RPM, for example, the most hydraulics-intensive phase of flight is approach, IE: you have all the primary flight controls moving about, flap extension, gear extension, etc, etc, all while the engines are at or only slightly above flight idle.
Also, brakes use a very small amount of fluid to do their work. Essentially, the brake is already filled with hydraulic fluid, it simply needs to be exposed to pressure in order to clamp the brake disc. On most systems, the brakes aren't eve exposed to full system pressure, but are exposed to a reduced pressure supplied from a pressure-check valve.
This doesn't answer the question about he simulation, merely provides some background.
Also, anti-skid does NOT equal automotive anti-lock. As mentioned, aviation anti-skid is light years more advanced than ABS. Correct use of either system, however, is to use the amount of brake pressure desired, with no brake pumping. ABS is pumping far faster and more accurately than any human ever could, and anti-skid systems work best with smooth, even control inputs.