Panasonic RL H1400 handheld computer

Can anyone tell me useful stuff about the Panasonic RL H1400 computer? I believe it was also sold under the Quasar brand name. I've just bought one. As well as the machine (which I've not tested yet), I got a little thermal printer/cassette interface, the AC adapter (for 110V mains), and 13 EPROMs in carriers. These seem to be insurance programs (what a suprise -- NOT), but are at least UV-erasable EPROMs. A few things : I have of course taken it apart, it is painful to dismantle with wires soldered between everything. The contemporary HP machines are a lot nicer to work on. With the bottom cover removed, you see the component side of the CPU board. I recognise the 6502 processor, some TTL and 4000-series CMOS chips, 2 8K ROMS soldered in, and 2 6116 (2K each) SRAMs. There's also a square PQFP chip, looks to be custom (I/O???). Alongside that board is a 6V NiCd pack with a fuse in series. A bit more desoldering and unscrewing let me flip that board out of the way. On the underside is another TTL chip and a lot of SMD passives, etc. The other PCB carries the keyboard contacts, the display, half-a-dozen Epson PQFP chips (display drivers?) and a couple of 4071s, which IIRC are OR gates. There's an expansion connector on the end of the CPU board. 44 contacts. Looks to be the 6502 bus + power some others. The printer also comes apart from the bottom. Its PCB contains a 4K ROM, an 80 pin PQFP ASIC, a driver chip, and a few small logic chips. Getting ito the rest of the machine is a bit more tricky, all it contains is the printer mechanism and 4.8V-worth of NiCds. I also cracked open the mains adapter.More complicated than I thought, there's a regulator chip in there. And a fuse mounted in clips (what is the point of a clipped in fuse inside a glued case??). Anyway, I've done a web search. Nothing very useful turned up. I did read a user manual on one site, which told me little that wasn't obvious. Anyone got any technical information on it? Any useful software? -tony