Not much help here, just interest.
Not much help here, just interest.
I had to post even though I cannot help you. I have not heard about cluster cards since the 1980's. If memory serves me, these were used to network early IBM computers. Cluster cards that I am aware of fit the IBM PC, IBM XT, IBM AT and even a version that fit the PCjr. But I do not remember if they had one to fit the Convertible.
The next question is why are you interested? (I presume you might be interested in networking the Convertible.)