SEQCTL
ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP);
ahc_outb(ahc, SEQCTL, ahc->seqctl);
ahc_outb(ahc, SEQCTL, ahc->seqctl);
ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM);
ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE);
ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50);
printf("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL));
ahc_outb(ahc, SEQCTL, 0);
ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
ahc_outb(ahc, SEQCTL, PERRORDIS);
ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);