LastXY Register for WP34S

[PANAMATIK]

(12-01-2014 09:08 AM)Paul Dale Wrote:  There is some amount of code for a number of the older HP calculators that use an I register and (i) for indirection. Leaving the 34S's I register clear makes porting these a little bit easier. This is part of the reason there is an I register in the device.

- Pauli

I understand, that these older programs don't use complex arithmetik, therefore the I(ndirecton) register remains backward compatible.
Full Backward compatibility with LastXY feature can only be achieved, if there will be a new register for LastY.

But all RAM is already used, like 40 years ago. :-(

Bernhard