OqtaDrive logo OqtaDrive

What is OqtaDrive?

OqtaDrive emulates a bank of 8 Microdrives for use with a Sinclair ZX Spectrum with Interface 1, or with a Sinclair QL. The goal is to functionally create a faithful reproduction of the original. On the Spectrum/QL side, operating the emulated Microdrives should feel exactly the same as using the real thing. So by definition, it does not try to compete with more “modern day” mass storage solutions for Spectrum and QL.

OqtaDrive is built around an Arduino that connects via its GPIO ports to the Microdrive interface and via serial connection to a daemon running on a host machine. This daemon host could be anything, ranging from your PC to a small embedded board such as a RaspberryPi Zero, as long as it can run a supported OS (Linux, MacOS, Windows). The same Arduino can be used with both Spectrum and QL, without any reconfiguration.

The adapter itself does not provide a UI. Instead the daemon exposes a REST API endpoint. This can be used by different tools for controlling the daemon. Currently, there’s a command line tool and a web UI. Just open it in your browser, be it on your PC or your phone, and load your cartridges. Additionally, you can control OqtaDrive also from your Spectrum and QL.

Here a few impressions of the web UI:

What Can I Do With This?

OqtaDrive’s architecture makes it very flexible, so many setups are possible. The simplest one would be just the Arduino that connects your Interface 1 or QL with your PC or Mac, and you manage everything from there. If you’re rather looking for a standalone solution, you could for example run the daemon on a RaspberryPi Zero W, and place this into a Microdrive or 3D printed case. Have a look at the build section for available options.

Feature Overview

Due to the minimal hardware required, OqtaDrive is also very cost-efficient. In the simplest setup, you only need an Arduino Nano and a few resistors and diodes. Additionally, if you own a Spectrum and a QL, you can use it with both, no need to have dedicated adapters. But above all, there’s the fun involved in building this!