I am looking for pointers on the protocol used for the communication between the main 82143 unit and the module that plugs into the HP-41 port (essentially the flat end of the 82143 cable that contains the HP-41 ROM and printer interface logic). I.e. I want to know what is going on in the wire that runs between the printer with the HP-41.
Why I want this info: To use the HP-41 module to talk to a different printer, or to interface the printing mechanism of the 82143 to a different computer.
Thanks
**vp