Int 7F Fn 14 - Alloy Ntnx (host), Mw386 - Get Busy Pointer [N] AH = 14h CL = 05h DX:DI -> buffer for busy structure (see below) Return: DX:DI buffer filled Format of busy structure: Offset Size Description 00h DWORD pointer to busy flag byte 04h WORD fixed port address (FF00h)