CUC_ABORT
lp->scb.command = CUC_ABORT | RX_ABORT;
lp->scb.command = CUC_ABORT | RX_ABORT;
lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
p->scb->cmd_cuc = CUC_ABORT;
p->scb->cmd_cuc = CUC_ABORT;