Int 08h System Timer
Int 09h Keyboard
Int 10h Video and Screen Services
Int 11h Read Equipment-List
Int 12h Report Memory Size
Int 13h Disk I/O Services, Floppy and Hard Disks
Int 14h Serial I/O Services (Communications Ports)
Int 15h Cassette and Extended Services
Int 16h Keyboard I/O Services
Int 17h Printer I/O Services
Int 18h BASIC Loader Service
Int 19h Bootstrap Loader Service
Int 1Ah System Timer and Clock Services
Int 1Bh Keyboard Break
Int 1Ch User Timer Tick
Int 4Ah User Alarm
Int 70h Real-Time Clock