Thanks for your response.
In the case of the 110+, it has built in I/O features to run the IL. Once the unit is connected to a Calc, the 41/71 can upload files, etc, in effect using the electronic discs
of the 110+ as mass storage devices. In the case of the cassette drive, you just use the storage commands to save data to it.
I LOVE the idea of using plug in ROMS to load programs versus the hard drive & wish my HP Omnibook XE2 had such features.
In the case of the 150, shareware was released in 1987 that ran the IL Card and provides a seemless interface "shell" between the unit and calcs. and was very easy to use.
Did you ever subscribe to the third party newsletter " the "Portable Paper?"
Do you still have the 110?
What applications did you use?
JK