Dk'tronics also made the "[[Dk'tronics Silicon Disc]]" RAM Disc. Not sure if/how it differs from the "Dk'tronics memory expansion".
== Upgrade ==
<gallery caption="Dk'tronics memory expansion">
Image:Upgrade 64K-256K Dk'tronics - TAU 29 pg 04.jpg|Upgrade
</gallery>
== Disc ==