DEC_3000_300_IOASIC_ADDR
imskp = (volatile u_int32_t *)(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);
imskp = (volatile u_int32_t *)(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);
(DEC_3000_300_IOASIC_ADDR + IOASIC_INTR);
(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);
imskp = (volatile u_int32_t *)(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);