MGrabParticlesA AddressList.l,NumPoints.l,Buffer.l ; Grab lots of points from Ptr.l table, into buffer mem

Does the same as MGrabParticles, except that the items on the list are stored as
actual memory addresses. Each address (a longword) is the actual address in
memory from which a pixel is to be plotted. Many animation effects are posible
using addresses rather than coordinates, as the grabbing of pixels is much faster
due to the time-consuming calculations being avoided in working out where in
memory to grab from. There is only one longword per item, which represents the X
and Y coordinates combined. Particles are grabbed to the memory buffer pointed to
by Buffer.l.