HP41 IR Printer Module

[PeterP]

Just throwing out some more ideas / thoughts here in case helpful:

Time, X-Func, and IR are all modules that relocate to Sub page 8 pages - 5, 3, 6 respectively. So maybe the relocation to page 6 is not possible from ports 1 and 3 due to some malfunctioning connection? (ie only odd pages work, not even?)

Do you have any application ROM with two pages available that you could try in all ports to see if that works?