CCR0_NC1
ccr0 |= CCR0_NC1 | CCR0_BARB;
ccr0 |= CCR0_NC1 | CCR0_BARB;
ccr0 |= CCR0_NC1;
write_cyrix_reg(CCR0, read_cyrix_reg(CCR0) | CCR0_NC1);
write_cyrix_reg(CCR0, read_cyrix_reg(CCR0) | CCR0_NC1);