Please forgive my lazy, not wanting to read to try and figure out on my own. Can one change how many bytes are read with a mode 2? Or use some other command to get a smaller range?

Whatever the case, see below responses to f1 02 644b while shorting the key in pin to ground.

Code:
DATA=200111407F7F7F8F8F8F1111118181812020200101010000007F9F0000800006000100004010FFFF0602000087004900000000E30004FFFF00FFFF0000000000 < C11 grounded
DATA=200111407F7F7F8F8F8F1111118080802020200101010000007F9F0000800006000100004010FFFF0602000087004900000000E30004FFFF00FFFF0000000000 < C11 floating
Now I guess I need to figure out where the processor is reading that from.