/* icu.h */
#define ICU1 0x20 /* I/O port address, 8259A #1 */
#define ICU2 0xA0 /* I/O port address, 8258A #2 */
#define OCR ICU1 /* Operation Command Register */
#define IMR (ICU1+1) /* Interrupt Mask Register */
#define EOI 0x20 /* non-specific end of interrupt */
