If you are a registered user of the Professional or Personal Editions and your support period has not yet expired you are eligible for a free upgrade. Email support 'at' astrobe.com if you haven't already received an email with instructions on how to download the v7.1.3 upgrade.
Other registered users can order an upgrade from: https://www.astrobe.com/upgrade.htm
Otherwise order the Personal or Professional Edition of Astrobe for Cortex-M4 from: https://www.astrobe.com/order.htm
More information is in the Astrobe for Cortex-M4 Feature Matrix and the documents:
- The 2016 Oberon Language Report
- Oberon for Cortex-M4 Microcontrollers
- The Oberon Programmmers Guide