CLRSINT0
bus_space_write_1(iot, ioh, CLRSINT0, CLRSELDI | CLRSELDO);
bus_space_write_1(iot, ioh, CLRSINT0, 0x7f);
ahd_outb(ahd, CLRSINT0, CLRIOERR);
ahd_outb(ahd, CLRSINT0, CLRSELINGO);
ahd_outb(ahd, CLRSINT0, CLRSELDO);
ahd_outb(ahd, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO
ahc_outb(ahc, CLRSINT0, CLRIOERR);
ahc_outb(ahc, CLRSINT0, CLRSELINGO);
ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);