HP41-CX problem with Printer and Digitaldrive and NOV64d

[Hiwi]

Hi all,
i have a HP-41cx with IL module and nov64d module.
On the loop i have a cassette drive HP84161 an an IL printer HP84162.
The nov64d has an active Hepax (tried both 4h and 1d) and CCD-OSX module installed. Others rampages are free. (showing NO Rom as expected)

I have some programs on the Hepax ram and HEPDIR shows 2310 or so regs free.

If the printer is on HEPDIR shows an ERROR: 'NO H-FILEYSYS'. I have disabled the switch on the IL-module so the printer rom does not swap to rampage 4, but no sucess.
I cannot explain this behaviour.

If the cassettedrive is the only device on the loop I can access the HEPAX ram as expected.

What am i doing wrong?

Ralf

[Diego Diaz]

Hi Ralf,

If my understanding of the symptoms is correct, the HP-IL module is conflicting with the auto-allocation feature of the HEPAX module in your NoV-64d.

When first turned ON, HEPAX finds page #6 free, and allocates itself into this address.

Once you enabled the printer switch in the HP-IL module, it's *also* allocated into page #6.

Using HEPAX 4H will also creates a conflict, since this version requires LIBRARY4 into page #4, and the printer code is allocated into this page when disabled by the switch.

Sorry about the bad news, HP-IL and HEPAX issues on a CX are known since long ago and you can find info about it in the HEPAX manual.

Using HEPAX 1D on a CX with your configuration may work if you set the printer to enable *before* turning your 41 on. This should force HEPAX code into page #C (if available); but I have not tested this exact configuration and have not the HP-IL module with me to confirm that end.

Also, using a CV can help (if you don't need CX functionalities) since HEPAX (again, 1D) will be allocated into page #5 avoiding conflicts with any other module (no TIMER allowed though).

Hope you find this information useful.

Please keep posting if you try some of the above.

Best regards.

Diego.

[Sylvain Cote]

Just to add on Diego answer, I have done some testing scenario that may help you.

HP-41CX fullnut + NoV-64d (default configuration: HEPAX-1D, no other roms)

Code:

HEXEDIT
addr : data :  xrom  : description
4000 : 000  :   00   : no rom
6000 : n/a  : hidden : auto-assigned address HEPAX ROM
7000 : 000  :   00   : no rom
8000 : 00B  :   11   : first  HEPAX RAM page
9000 : 00C  :   12   : second HEPAX RAM page
A000 : 00D  :   13   : third  HEPAX RAM page
B000 : 00E  :   14   : fourth HEPAX RAM page
C000 : 000  :   00   : no rom

HP-41CX fullnut + NoV-64d (default configuration) + HP-IL (printer disabled)

Code:

HEXEDIT
addr : data :  xrom  : description
4000 : 01D  :   29   : HP-IL printer ROM - disabled
6000 : n/a  : hidden : auto-assigned address HEPAX ROM
7000 : 01C  :   28   : HP-IL ROM
8000 : 00B  :   11   : first  HEPAX RAM page
9000 : 00C  :   12   : second HEPAX RAM page
A000 : 00D  :   13   : third  HEPAX RAM page
B000 : 00E  :   14   : fourth HEPAX RAM page
C000 : 000  :   00   : no rom

HP-41CX fullnut + NoV-64d (default configuration) + HP-IL (printer enabled)

Code:

HEXEDIT
addr : data :  xrom  : description
4000 : 000  :   00   : no rom
6000 : 01D  :   29   : HP-IL printer ROM - enabled
7000 : 01C  :   28   : HP-IL ROM
8000 : 00B  :   11   : first  HEPAX RAM page
9000 : 00C  :   12   : second HEPAX RAM page
A000 : 00D  :   13   : third  HEPAX RAM page
B000 : 00E  :   14   : fourth HEPAX RAM page
C000 : n/a  : hidden : auto-assigned address HEPAX ROM

edit 1: typos

edit 2: if you want us to be more precise, please give us your exact ClonicConfig configuration so we can reproduce your specific setup.

edit 3: Same exact tests with a 41CX halfnut (s/n: 2814S...) gives the same results.

[Diego Diaz]

Hi Sylvain,

Thanks for taking the time to check these configurations and confirming the behaviour expected on every case.

Your input is always welcome. :-)

Best wishes.

Diego.

[Hiwi]

Hi Diego and Sylvain,
thank you very much for solving my problem and the configuration examples. It works now and i am happy.
Ralf

[Diego Diaz]

Hi Ralf,

And thanks for the positive feedback.

Enjoy your 41s! :-)

Diego.