HP41-CX problem with Printer and Digitaldrive and NOV64d

[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.