CMDS_PENDING
ahd_outw(ahd, CMDS_PENDING, 0);
ahd_outw(ahd, CMDS_PENDING, pending_cmds - ahd_qinfifo_count(ahd));
ahd_outw(ahd, CMDS_PENDING,
ahd_inw(ahd, CMDS_PENDING)-1);
ahd_outw(ahd, CMDS_PENDING, ahd_inw(ahd, CMDS_PENDING) - found);
ahd->scb_data.numscbs, ahd_inw(ahd, CMDS_PENDING),