Old style driver modules include the Q8 up to and including hardware revision 0x06. These old-style modules use a 48-pin 0.1-inch connector which is not polarised (i.e. it can be inserted both forwards and backwards) though it only works in the correct orientation. The long pins on these connectors provide an undesirably large removal force, and easily become bent when removed improperly.
New style driver modules including Q8 (HW rev. 7 and up) and all Q8iv revisions use a 64-terminal card edge connector, which is polarised. These new connectors are robust to misalignment, will never become bent, and are generally easy to use.
We offer adapters between the old and new style connectors: old male to new female, and old female to new male. See our product pages for details.