SandMath_44 4x4 on the NoV64

[Sylvain Cote]

(09-19-2022 04:27 PM)floppy Wrote:  Can the sandmath4x4 be placed in page 5&6 or 6&7 or 7&8.. ? (assumption: these pages are not busy with any CX or other printer/hpil).
Or is there any limitation?

Bank switching is peripheral specific and can have different behavior. (41CL, DM41X, Clonix-D, MLDL, etc.)
Normally you can expect (but not assume) that page 4, 6, & 7 will be switched individually and that port pages (8&9, 10&11, 12&13, 14&15) are linked,
this means that both pages (even & odd) are switched at the same time.
If you have multiple hardware plugged in that support bank switching, each one is responsible to manage its own pages and can have different behavior.
More information can be found in the HP-41C Bank Switching Schemes article.

FYI, HP-41CX uses page 5 bank 1 for the CX Time module and page 5 bank 2 for the CX extra functions.

As for the sandmath4x4, my understanding is that it need one page over four banks and that library4 is in page 4.
I am not aware of any restriction regarding the page, so if am correct, pages 6 to 15 are valid, but remember that port pages are most often linked.
Ángel is the best person to answer this question.

Sylvain