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Int 0x2F, AH=0x40

2F4000 INT 2F - Windows 3+ (OS/2 2.x???) - GET VIRTUAL DEVICE DRIVER (VDD) CAPABILTIES
2F4001 INT 2F C - OS/2 compatibility box - SWITCHING DOS TO BACKGROUND
2F4002 INT 2F C - OS/2 compatibility box - SWITCHING DOS TO FOREGROUND
2F4003 INT 2F - Windows 3.x - ENTERING VIDEO DRIVER CRITICAL SECTION
2F4004 INT 2F - Windows 3.x - EXITING VIDEO DRIVER CRITICAL SECTION
2F4005 INT 2F C - Windows 3.x - SWITCHING DOS TO BACKGROUND
2F4006 INT 2F C - Windows 3.x - SWITCHING DOS TO FOREGROUND
2F4007 INT 2F - Windows 3.x - ENABLE VDD TRAPPING OF VIDEO REGISTERS
2F4010 INT 2F - OS/2 v2.0+ - INSTALLATION CHECK / GET VERSION
2F4011 INT 2F - OS/2 - GET VDD API ENTRY POINT
2F4021 INT 2F UC - Diamond Stealth64 Video - STLTH64.VXD - ???
2F4022 INT 2F UC - Diamond Stealth64 Video - STLTH64.VXD - ???
2F4023 INT 2F UC - Diamond Stealth64 Video - STLTH64.VXD - ???
2F4027 INT 2F UC - Diamond Stealth64 Video - DMSSTL.DRV - ???
2F4040 INT 2F - PharLap 286|DOS-Extender Lite v2.5 - ???

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