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Int 0x21, AH=0x69

2169 INT 21 U - DOS 4.0+ internal - GET/SET DISK SERIAL NUMBER
2169 INT 21 - DR DOS 5.0 - NULL FUNCTION
216969 INT 21 - VIRUS - "Rape-747" - INSTALLATION CHECK
2169FFDX0000 INT 21 U - CUBIT v4.00 - GET CUBIT INT 21 HANDLER
2169FFDXCFBF INT 21 U - CUBIT v4.00 - UNINSTALL

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