* The 256K versions (of both Memory Expansion and Silicon Disk) were made in separate versions for 464/664 and 6128 (they should be compatible at software side, possibly the differ only cosmetically...?)
* All 64K/256K Memory Expansions, and the 64K Silicon Disc consist of a single cartridge. The 256K Silicon Disc is a special case: It consists of two cartridges shipped together (one contains the ROM, the other contains the RAM).
== Other Versions ==
Dk'tronics also made the "[[Dk'tronics Silicon Disc]]" RAM Disc. '''Not sure if/how it differs from the "Dk'tronics memory expansion" ?'''
== Pictures ==