IOI               135 dev/ic/aic6360reg.h #define IOI		0x40
IOI               378 dev/ic/ncr53c9xvar.h #define IOI			0x01
IOI              3605 dev/microcode/aic7xxx/aic79xx_reg.h #define		IOI             	0x40
IOI              1344 dev/microcode/aic7xxx/aic7xxx_reg.h #define		IOI             	0x40