* forme (poke-ushort! bytes adr v)
*
*/
startAt.isGoodArgsCnt(4);
startAt.requireNodeType(1, Node.VTYPE_INDIRECTION);
Bytes b = (Bytes)startAt.getSubNode(1, Node.TYPE_BYTES).getExternal();
int adr = (int) startAt.getSubNode(2, Node.TYPE_NUMBER).getNumber();
double v =startAt.getSubNode(3, Node.TYPE_NUMBER).getNumber();
int vf=((int)v) & 0xFFFF;
if(vf!=v)
throw new InterpreterException(StdErrors.extend(StdErrors.Invalid_parameter,""+v));
b.poke_ushort(adr, vf);
return null;
}