Clarification on multiple mtdram devices

[MikeW]

>From a (much) earlier post, I note that the mtdram driver can emulate
several /dev/mtd's by "loading the driver more than once".

Does this mean modprobing *once* but then setting up multiple
device nodes with the same major number and different minor numbers ?

I presume this also implies that each device must have the same size & erasesize.

Regards,
MikeW