CLRSELINGO
ahd_outb(ahd, CLRSINT0, CLRSELINGO);
ahd_outb(ahd, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO
ahc_outb(ahc, CLRSINT0, CLRSELINGO);
ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);