Only PCMCIA RAM cards should cause a conflict as PCMCIA IO cards are mapped to a different area of memory outside the 8mb allocated to fast ram.
000000 to 1FFFFF 2 MB Chip RAM(or system ROM overlay)
200000 to 5FFFFF 4 MB Zorro II expansion space
600000 to 9FFFFF 4 MB Credit Card memory if CC present
AOOOOO to A1FFFF 128 KB Credit Card Attributes
A20000 to A3FFFF 128 KB Credit Card I/O
A40000 to A5FFFF 128 KB Credit Card Bits (similar to CDTV)
A60000 to A7FFFF 128 KB PC I/O
As said above, it is possible to have more than 4MB fastram together with PCMCIA cards however it won't be in one continuos adress space, don't know exactly what that limitiation will do, anyone?
Here's an even funnier peice of kit in my collection... it support 9MB and PCMCIA compability:
http://amiga.resource.cx/exp/alfaram1200
