NCR_700_set_tag_neg_state
NCR_700_set_tag_neg_state(SCp->device, NCR_700_DURING_TAG_NEGOTIATION);
NCR_700_set_tag_neg_state(SDp, NCR_700_START_TAG_NEGOTIATION);
NCR_700_set_tag_neg_state(SCp->device, NCR_700_FINISHED_TAG_NEGOTIATION);
NCR_700_set_tag_neg_state(SCp->device,