Thread: hp-41cx / NoV-64d / Hepax XF multi-function

[Ángel Martin]

(09-07-2023 12:41 PM)Sylvain Cote Wrote:  

(09-07-2023 11:31 AM)MeindertKuipers Wrote:  I am using ClonixConfig 6.1, and the firmware that more or less automatically loads, this is NoVRAM-H. The source seems to have a fix to a bankswitching issue.
Actually just tried XFA and HEPAX prompting functions in PRGM mode, and these show the same erratic behavior.

Hello Meindert,

.......

Historically page 4 was only used for take-over ROM and for the IL printer disabled mode,
then Ángel started to use it for his Library4,
then Monte followed with his own page 4 library
and of course, Ángel came back with a bank switched page 4 library.
This last step broke the Clonix/NoV bank switching scheme.
..........

Ángel's HEPAX 4H is fairly new, use page 4 (LIB4) and use bank switching (4 banks), but not sure if t has page remapping. [only works with a CX OS based calc, I think]

I cannot do it right now, but I will load and test HEPAX 1D with the old and new page switching firmware tonight (UTC-4h) and will come back with the results.

The picture gets denser as more and more advanced solutions are released, let me try to shed some light on this.-

First, it is correct that the HEPAX 4H needs the Library#4 for *some* cases, so it is recommended to always have the Library#4 configured when the HEPAX 4H is used. And as a consequence, the CX OS would eventually be also needed because the Library#4 requires it (more abut this below).

But I believe Kees is having these issues with the HEPAX-1D, which needless to say has nothing to do with the Lib#4 - at all!. It should work on any 41C model, no Lib#4 required.

As to the Bank-switched version of the Library#4 - this is a recent release that was put together initially to be used with the MAXX modules. It removes the dependency from the CX OS (which is a good thing), but the price paid is that some CX routines were added to the Library, in a secondary bank (the main page was already full). Incidentally, I believe the current BS scheme on NoVo's does support page#4 BS as well, but I might be wrong?

Hope this clears the picture a bit...

ÁM