HP-15C CE 15.2 mode -> 15 mode Caution

[J-F Garnier]

This is quite understandable since the "15c mode" has 96 allocatable registers only so 98 registers including the non-allocatable R0 and R1.

Actually, for safely returning from the 15.2 mode back to 15 mode, the rule is that there must be at least 96 free allocatable registers, whatever the registers are used for storage, matrices or programs.

But frankly, why switching back to the 15c 96-register mode ?

J-F