import grid3;

size(10cm,0,IgnoreAspect);
currentprojection=orthographic(0.25,1,0.25);
limits((-2,-2,0),(0,2,2));

xaxis3(Label("$x$",position=EndPoint,align=Z), YZEquals(-2,0),
       RightTicks3(Step=0.5, gridroutine=XYgrid));

yaxis3(Label("$y$",position=EndPoint,align=Z), XZEquals(-2,0),
       Ticks3(Label(align=-X),N=8,n=2, gridroutine=YX_YZgrid));

zaxis3("$z$", RightTicks3(ZYgrid));