INT 2F - PCED/VSTACK - INSTALLATION CHECK AX = 48C1h BL = 00h Return: AX = 0000h if installed BX = VSTACK resident segment Program: VSTACK is a resident backscroll utility included as part of the PCED package by Cove Software Note: chains if BL <> 00h on entry SeeAlso: AX=48C0h,AX=48C2h