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Joined: Aug 2005
My LIF Untilites for Linux distribution contains scheamtics and software for an interface between a parallel printer port and an HP41 barcode wand (which you have to modify by soldering an opto-isolator to 2 of the wires between the wand and the HP41 module).
The interface takes care of all the timing of the 'barcode' data, so this should work with any machinewith a parallel port. There's software for luinux to transfer HP41 programs and data files (but only 'normal' numbers and text strings), provided as C source code. It shouldn't be too hard to port it.