If a chunk exists for that block, this means the memory is stored compressed.
It is possible to have a snapshot with 64KB base ram uncompressed and additional banks compressed, but it's advised to either use MEM chunks or store the memory uncompressed in the V2 style.
A RLE compression is used with 0x0e5 as the control byte.
E5 03 11 = 11 11 11
E5 00 = E5
== Memory ==
Uncompressed snapshot allows sizes of: