NoV-64D and HEPAX Questions

[BitWiz]

Sylvain,

Thank you for your response.

What I want to with the Nov-64D module is to maximize the entire address space. I figure I will have to do some kind of enabling/disabling of what goes where.

Then I can write some user/M-Code to switch NoV ROM and HEEPAX ROM Images in RAM on and off. Think of it as switching personalities.

Basic HP-41CX with Dual X-Mem, HP-IL (with printer enabled)

Something like the following:

Personality #1 (normal and synthetic programming):
41C Emulator (4K)
ZENROM (4K)
HP Development ROM (8K)
HP Extended I/O ROM (4K)
Library 4 (4K)
HEPAX (8K) (Possibly not necessary if I can do the switching some other way)
CCD ROM (Or my own ROM routines or the NOV CHAP ROM)

Personality #1A (normal with PPC)
Disable the Extended I/O and the CCD ROM and enable the PPC ROM.

Personality #2 (M-Coding):
HEPAX (8K)
ZENROM (4K) (Possibly not needed because of equivalent functionality in the HEPAX ROM)
HP IL Development ROM (8K)
HP IL Extended I/O ROM (4K)
8K RAM for M-Code work.

The reason that the HP-IL Development ROM is in all personalities is that it is build into my double X-MEM module. If someone has a double X-MEM then i could ditch the DEV-IL and that would simplify things a lot.

In a perfect world I would have a module with something like 128K (or more) of flash and 32K (or more of RAM) and any 4K block of flash or RAM could be configured to be at any address (R/W or Read only) at any 4K page in the HP-41 System Address Space. And for simplicity of use I would allow for switching sets of these configurations so a single command of some sort would switch the entire address space.

Thanks,

Mike