◄INT 21H Summary► ◄Contents► ◄Index► ◄INT Instruction► ────────────────────────────────────────────────────────────────────────────── Category Description Character I/O Old-style (DOS1) read and write to devices Directory Operations Get, set, create, and delete directory Disk Management Select drive and get drive status File Operations Open, close, and manage files File Operations (FCB) Functions use File Control Block--not recommended Memory Management Allocate or resize memory block Miscellaneous Miscellaneous system functions Process Management Execute or terminate process Record Operations Read and write to file Record Operations (FCB) Functions use File Control Block--not recommended Time and Date Get or set date and time -♦-