Hardware stuff

Ok, i looking for hardware info about saturn and segacd:

1. Pinout of saturn cart. slot

2. HW info about segacd memory backup cart (i what to make one)

Thxs a lot!!
I have yet to see a pinout of the Saturn cart slot. From what I've gathered it seems to have a 16-bit data bus and probably has an address bus of 24 bits, based on the fact that there's supposed to be a 32MB address space for it. I tried to trace the connections on my AR4M+ to determine the pinout, but it started getting a bit tricky and I decided to put it off. Tracing something really simple like an ST-Key (I assume ST-Key is nothing but a ROM and some passive components) or a standard AR would probably be much simpler.