SAMPLE_ENABLE_REG
master_outb(0,SAMPLE_ENABLE_REG);
master_outb(0,SAMPLE_ENABLE_REG);
master_outb( 0,SAMPLE_ENABLE_REG);
master_outb( 1,SAMPLE_ENABLE_REG);
master_outb(0,SAMPLE_ENABLE_REG); /* better safe */
master_outb(0,SAMPLE_ENABLE_REG);