Defines starting with `i' in src

• IC_ABNORMAL src/floppy.c:260
• IC_INV_CMD src/floppy.c:261
• IC_NORMAL src/floppy.c:259
• INTR_BS src/esp.c:125
• INTR_DC src/esp.c:126
• INTR_FC src/esp.c:124
• INTR_ILL src/esp.c:127
• INTR_RESEL src/esp.c:123
• INTR_RST src/esp.c:128
• INTR_SEL src/esp.c:121
• INTR_SELATN src/esp.c:122
• IO_MASK src/ioMem.c:20
• IO_SEG_MASK src/dma.c:31
• IO_SIZE src/ioMem.c:21