INT 16h, 00h    Read char from buffer - wait if it's empty
 INT 16h, 01h    Read char from buffer - don't wait
 INT 16h, 02h    Get shift status
 INT 16h, 03h    Set delays                        (Jr,AT model 339,XT286,PS)
 INT 16h, 04h    Keyclick                                           (Jr,CONV)
 INT 16h, 05h    Write to keyboard buffer         (AT model 339,XT2,XT286,PS)
 INT 16h, 10h    Get enhanced keystroke           (AT model 339,XT2,XT286,PS)
 INT 16h, 11h    Check enhanced keystroke         (AT model 339,XT2,XT286,PS)
 INT 16h, 12h    Get enhanced shift flags         (AT model 339,XT2,XT286,PS)
 INT 16, 6969 - PC Tools v5.1 BACKTALK - Unhook
 INT 16, 6969 - PC Tools v5.1 BACKTALK - Installation check
 INT 16, 70h - FAKEY.COM - Installation check
 INT 16, 71h - FAKEY.COM - Push keystrokes
 INT 16, 72h - FAKEY.COM - Clear faked keystrokes
 INT 16, 73h - FAKEY.COM - Play tones
 INT 16, 75h - pcANYWHERE - Set tick count for scanning
 INT 16, 76h - pcANYWHERE - Set error checking type
 INT 16, 77h - pcANYWHERE - Log off
 INT 16, 7761h  - WATCH.COM - Installation check
 INT 16, 7788h - PC Magazine PUSHDIR.COM - Installation check
 INT 16, 79h - pcANYWHERE - Check status
 INT 16, 7Ah - pcANYWHERE - Cancel session
 INT 16, 7B00h - pcANYWHERE - Suspend
 INT 16, 7B01h - pcANYWHERE - Resume
 INT 16, 7Ch - pcANYWHERE - Get port configuration
 INT 16, 7Dh - pcANYWHERE - Get/set terminal parameters
 INT 16, 7Eh - pcANYWHERE - Communications i/o through port
 INT 16, 7Fh - pcANYWHERE - Set keyboard/screen mode
 INT 16, 80h - MAKEY.COM - Installation check
 INT 16, F0h - Compaq 386 - Set cpu speed
 INT 16, F1h - Compaq 386 - Read current cpu speed
 INT 16, F2h - Compaq 386 - Determine attached keyboard type
 INT 16, FFB2h - PC Tools v5.5 DESKTOP API - ???
 INT 16, FFB3h - PC Tools v5.5 DESKTOP API - ???
 INT 16, FFB4h - PC Tools v5.5 DESKTOP API - ???
 INT 16, FFB5h - PC Tools v5.5 DESKTOP API - Get/set ???
 INT 16, FFB6h - PC Tools v5.5 DESKTOP API - ???
 INT 16, FFB7h - PC Tools v5.5 DESKTOP API - Set ???
 INT 16, FFB8h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFB9h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFBAh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFBBh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFBCh - PC Tools v5.1 DESKTOP API - Restore original screen???
 INT 16, FFBDh - PC Tools v5.1 DESKTOP API - Pop down???
 INT 16, FFBEh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFBFh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC0h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC1h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC2h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC3h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC4h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC5h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC6h - PC Tools v5.1 DESKTOP API - Set ???
 INT 16, FFC7h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFC8h - PC Tools v5.1 DESKTOP API - Get ???
 INT 16, FFC9h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFCAh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFCBh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFCCh - PC Tools v5.1 DESKTOP API - Display asciz string
 INT 16, FFCDh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFCEh - PC Tools v5.1 DESKTOP API - Set ??? delays
 INT 16, FFCFh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD0h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD1h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD2h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD3h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD4h - PC Tools v5.1 DESKTOP API - Create/open/delete file
 INT 16, FFD5h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD6h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD7h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFD8h - PC Tools v5.1 DESKTOP API - Safe create file
 INT 16, FFD9h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFDAh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFDBh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFDCh - PC Tools v5.1 DESKTOP API - Unhook
 INT 16, FFDDh - PC Tools v5.1 PCShell API - Installation check
 INT 16, FFDDh - PC Tools v5.1 PCShell API - REQUEST POP-Up
 INT 16, FFDDh - PC Tools v5.1 PCShell API - Get ???
 INT 16, FFDDh - PC Tools v5.1 PCShell API - ???
 INT 16, FFDDh - PC Tools v5.1 PCShell API - ???
 INT 16, FFDDh - PC Tools v5.1 PCShell API - ???
 INT 16, FFDDh - PC Tools v5.1 PCShell API - ???
 INT 16, FFDDh - PC Tools v5.1 PCShell API - ???
 INT 16, FFDEh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFDFh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE0h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE1h - PC Tools v5.1 DESKTOP API - Beep
 INT 16, FFE2h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE3h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE4h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE5h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE6h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE7h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFE8h - PC Tools v5.1 DESKTOP API - Display number
 INT 16, FFE9h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFEAh - PC Tools v5.1 DESKTOP API - Display counted string
 INT 16, FFEBh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFECh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFEDh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFEEh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFEFh - PC Tools v5.1 DESKTOP API - Installation check
 INT 16, FFF0h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFF1h - PC Tools v5.1 DESKTOP API - Alternate installation check
 INT 16, FFF2h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFF3h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFF4h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFF5h - PC Tools v5.1 DESKTOP API - Get screen attribute array
 INT 16, FFF6h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFF7h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFF8h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFF9h - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFFAh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFFBh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFFCh - PC Tools v5.1 DESKTOP API - Get ???
 INT 16, FFFDh - PC Tools v5.1 DESKTOP API - ???
 INT 16, FFFEh - PC Tools v5.1 DESKTOP API - Show mouse cursor
 INT 16, FFFFh - PC Tools v5.1 DESKTOP API - Hide mouse cursor