MB_BIC
MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
MB_BIC(bay, OHARE_MBCR, 0x00000F00);
MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);