RBIL61 - INT 16 - Netroom POSTNET - GET OLD INTERRUPT VECTORS {undocumented}

INT 16 U - Netroom POSTNET - GET OLD INTERRUPT VECTORS                          
	AX = 5758h
	BX = 5859h
Return: CF clear
	DX:BX -> saved copy of interrupt vector table
InstallCheck:	call this function and compare BX against 5859h on return; if
	  it has changed, POSTNET is installed
SeeAlso: AX=5758h/BX=5858h
Index:	installation check;Netroom POSTNET