From: Han on
I understand how this can be used in the HP48 series, but I am
wondering if this is still used in the HP49G+/HP50G series. It seems
that CARDCTRL would have no use since the HP49 did not have expansion
slots. On the 49G+ or 50G, however, we have SD cards. Can someone shed
some light on how the 50G normally handels insertion of SD cards in
ROM? (Does it trigger an interrupt? etc)