int 4A

Int 4A - SYSTEM - USER ALARM HANDLER
Int 4A - Z100 - Slave 8259 - S100 vectored line 2
Int 4A - Tandy 2000 - PRINT SCREEN
Int 4A - Acorn BBC Master 512 - OSWORD - MISC FUNCTIONS USING CONTROL BLOCK
Int 4A/AH=00h - TI Professional PC - KEYBOARD - GET KEYPRESS
Int 4A/AH=01h - TI Professional PC - KEYBOARD - GET KEYBOARD STATUS
Int 4A/AH=02h - TI Professional PC - KEYBOARD - GET KEYBOARD MODE
Int 4A/AH=03h - TI Professional PC - KEYBOARD - FLUSH KEYBOARD BUFFER
Int 4A/AH=04h - TI Professional PC - KEYBOARD - SEND COMMAND TO KEYBOARD
Int 4A/AH=05h - TI Professional PC - KEYBOARD - INSERT CHARACTER INTO KEYBOARD BUFFER

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