I just compared your pics from my card and I noticed that on mine jumper JP1 was set up on pin 1-2 while on yours it seems to be on pin 2-3. Also my external dipswitches are as follow (1 to 8, 0 is off, 1 is on) : 00110110

I still haven't got my hands on this card manual so I don't really know what this jumper do but I guess it would be easy for you to do a test by moving JP1 in the 1-2 position ?

i have a similar Card in Stock, also from a Portable.

Would you be so kind as to dump the EPROM of it ? I fear mine might be corrupted