MEM2CPU
*(uint32 *)MEM2CPU( si->cp.feedback.mem_type, si->cp.feedback.head_mem_offset) =
memset( MEM2CPU( cp->ring.mem_type, cp->ring.mem_offset), 0, cp->ring.size * 4 );
*(uint32 *)MEM2CPU( cp->feedback.mem_type, cp->feedback.head_mem_offset) = 0;
memset( MEM2CPU( cp->feedback.mem_type, cp->feedback.scratch_mem_offset), 0, 0x40 );
memset( MEM2CPU( cp->buffers.mem_type, cp->buffers.mem_offset), 0,