PC Card CardBus controller OZ711 PC Card connector one (supports one Type I or Type II card) Cards supported 3.3 V and 5 V PC Card connector size 80 pins Data width (maximum) PCMCIA 16 bits CardBus 32 bits.
Is the same on Latitude D830. I order the precision m4300. Maybe is a typing error.
Further research still yields no results. Searching Google for the exact phrase "PC Card connector size 80 pins" gives only the manual and this page. There are also memory interfaces, PCI Express x16, and IDE connectors that sometimes use 80 pins.
"All PC Card devices use an identical 68 pin dual row connecting interface." - Wikipedia
If it is a Type I or II Cardbus slot, it has to meet standards. Otherwise, how would all those other PCMCIA cards work with that Dell other than the p2 card?