40 INT 40 - DISKETTE - ROM BIOS DISKETTE HANDLER RELOCATED BY HARD DISK BIOS 40 INT 40 - Z100 - Master 8259 - Parity error or S100 error 40 INT 40 - Acorn BBC Master 512 - "OSFIND" - OPEN FILE 40 INT 40 - TI Professional PC - IRQ0