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Int 0x21, AH=0x18

2118 INT 21 - DOS 1+ - NULL FUNCTION FOR CP/M COMPATIBILITY
2118 INT 21 - U - PTS-DOS 6.51 & S/DOS 1.0 - EXTENDED RENAME FILE USING FCB
211812 INT 21 - VIRUS - "Tasha Yar" - INSTALLATION CHECK
21187FBX4453 INT 21 - VIRUS - "DS-3783" -INSTALLATION CHECK
2118FF INT 21 - VIRUS - "Pathogen:SMEG" - INSTALLATION CHECK

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