psc_write_byte
psc_write_byte(pIERbase + i, 0x0F);
psc_write_byte(pIFRbase + i, 0x0F);
psc_write_byte(pIFR, irq_bit);
psc_write_byte(pIER, (1 << irq_idx) | 0x80);
psc_write_byte(pIER, 1 << irq_idx);