SCB_PACKETIZED
scb->flags &= ~(SCB_PACKETIZED);
(scb1->flags & SCB_PACKETIZED) != 0;
&& (scb->flags & SCB_PACKETIZED) == 0
& (SCB_PACKETIZED|SCB_ACTIVE)) == SCB_ACTIVE
&& (waiting_scb->flags & SCB_PACKETIZED) == 0
if ((scb->flags & SCB_PACKETIZED) != 0) {
scb->flags |= SCB_PACKETIZED;