facing to an input device such as laser based barcode scanning engine which outputs undecoded binary data.FIG. 4 is a memory map of the three memory zones of the PC Card interfaces disclosed herein.FIG. 5 is a diagram of the software architecture within the PDA which supports the PC Card.FIGS. 6A, 6B and 6C are a flow chart of the processing performed on a PC Card interface according to the teachi