I'm working on a ROM emulator for the HP-85 - i.e. a replica of the original (and hard to find) Programmable ROM Module. From photos (thanks to Vassilis Prevelakis), I've drawn a schematic of most of the original module. But I've hit a snag where some of the traces disappear under the ICs. I've been able to deduce most of these but some are too ambiguous to "pin" down. Is there someone who owns this elusive module that would be willing to ring some paths for me (probably 10 to 20) ? Some connections may be obvious simply with a closer visual inspection of the actual module. Thanks, Bill