Do you know if there are any low cost cables?
The last time that I checked, the site that originally marketed a serial cable/level shifter for the 50g had raised its original price for it considerably.
A few weeks ago, Eric Rechlin started this comp.sys.hp48 thread, so there seems to be some reason to hope for a reasonably-priced alternative becoming available.
Other than that, as far as I know, it would be a do-it-yourself project.
Regards,
James
Edited: 19 June 2007, 4:05 a.m.
I'm still working on it, but things are going slower than expected. I expect the first boards should arrive from the manufacturer within a week so I can assemble the first prototypes.
If anyone else is still interested in testing, please contact me, and I will keep you informed directly with more information when I am ready.