INT 60 u - HP 95LX System Manager - LET SYSTEM MANAGER HANDLE MENU KEYSTROKE    
	DI = 0204h
	STACK:	2 WORDs unused dummies (for calls from high level languages)
		DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to menu data (see #03281)
		WORD	keystroke
		DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to WORD to receive selection number
Return: buffer for selection number filled with index of selected menu item or
	  FFFFh if no final selection yet
	STACK unchanged
SeeAlso: INT 60/DI=0200h,INT 60/DI=0202h,INT 60/DI=0207h