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 Int 15h, 21h            Read or Write POST Error Log                    PS/2
 Int 15h, 40h            Read/Modify Profiles                     Convertible
 Int 15h, 41h            Wait for External Event                  Convertible
 Int 15h, 42h            Request System Power Off                 Convertible
 Int 15h, 43h            Read System Status                       Convertible
 Int 15h, 44h            Activate/Deactivate Modem Power          Convertible
 Int 15h, 4Fh            Keyboard Intercept                              many
 Int 15h, 80h            Device Open                                     many
 Int 15h, 81h            Device Close                                    many
 Int 15h, 82h            Device Program Termination                      many
 Int 15h, 83h            Event Wait                                      many
 Int 15h, 84h            Joystick Support                                many
 Int 15h, 85h            System Request Pressed                          many
 Int 15h, 86h            Wait                                      XT-286, AT
 Int 15h, 87h            Move Block                                XT-286, AT
 Int 15h, 88h            Get extended memory size                  XT-286, AT
 Int 15h, 89h            Switch to Protected Mode                  XT-286, AT
 Int 15h, 90h            Device Busy                                     many
 Int 15h, 91h            Interrupt Complete                              many
 Int 15h, C0h            Return System Configuration                     many
 Int 15h, C1h            Extended BIOS Data Area                         PS/2
 Int 15h, C2h            Mouse Interface                                 PS/2
 Int 15h, C3h            Enable/disable Watchdog Time-Out                PS/2
 Int 15h, C4h            Programmable Option Select (POS)                PS/2