HP-style Keycode for TI-58/59

[Matt Agajanian]

Hi all.

Given:
1–the TI-57 featured fully-merged keycodes

2—the 58/59 series came out later than the SR-52 and HP-67

3–by that time both Woodstock and Spice series models were made, there was a version of fully-merged keystrokes

4—at the most, 960 program steps/100 register selective-partitioning was possible on the TI-58/59 series

why didn’t TI develop fully-merged keystrokes on the 58/59?

Thanks