Dobbertin supplied [[RDOS]] as a optional ROM to use the memory expansion.
== Photos Pictures ==
<gallery caption="The Dobbertin ram expansion">
Image:Dobbertin ram 1a.jpg|
Image:Dobbertin ram 2a.jpg|
Image:Dobbertin_512Kb_Top.jpg|Unit Top
Image:Dobbertin_512Kb_Bottom.jpg|Unit Bottom
Image:Dobbertin_512Kb_PCB_Top.jpg|PCB Top
Image:Dobbertin_512Kb_PCB_Bottom.jpg|PCB Bottom
</gallery>
[[Category:Hardware]] [[Category:Peripherals]] [[Category:Memory expansions]]