SNSCB_QOFF
oldvalue = ahd_inw(ahd, SNSCB_QOFF);
ahd_outw(ahd, SNSCB_QOFF, oldvalue);
ahd_outw(ahd, SNSCB_QOFF, value);
ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext);
qinpos = ahc_inb(ahc, SNSCB_QOFF);
ahc_outb(ahc, SNSCB_QOFF, qinpos);
qinstart = ahc_inb(ahc, SNSCB_QOFF);
ahc_outb(ahc, SNSCB_QOFF, qinstart);
qinpos = ahc_inb(ahc, SNSCB_QOFF);
ahc_outb(ahc, SNSCB_QOFF, qinpos);