Hi all,
I've recently come across an 82180A module that shows "-EXT FCN 1A" in CAT 2.
The functions list is identical to my other "X FUNCTIONS" (ver 1C), and it also shows 124 registers of Extended Memory.
I've checked the most well known lists for HP-41 modules and have found references to the 1B and 1C versions only...
Was the 1A version ever released? Or was it only an HP internal preliminary revision?
Any clue?
Diego.