SCB_PACKETIZED
if ((scb->flags & SCB_PACKETIZED) != 0) {
scb->flags &= ~SCB_PACKETIZED;
packetized = (scb->flags & SCB_PACKETIZED) != 0;
&& (scb->flags & SCB_PACKETIZED) == 0
scb->flags |= SCB_PACKETIZED;