TI-66 double speed mod

[pauln]

(07-06-2022 05:08 PM)Nigel (UK) Wrote:  After entering each program instruction there's a big pause while the calculator sorts itself out.

I agree, this is extremely annoying. The reason is that, in LRN mode, the TI-66 auto-inserts instructions instead of overriding them like the TI-59. So all the instructions after that instruction need to be shifted.

Explicit insertion ("Ins" key) is an expensive operation for the TI-59 (unless the current step is towards the end) and it is painfully slow for the TI-57.

Looking at http://rskey.org/hp65, it seems that HP-65 auto-inserts too. It is remarkable that they were able to do it without being painfully slow. I wonder how they did it...