Amiga OS 3.9: how to install without a cd-rom Spiros Kourias. I thought it would be a nice idea to upload an updated video of how to install Amiga OS 3.9 using only a CF card and an 3.9 ISO. Haage & Partner released AmigaOS 3.9 in the 90's which definitely was an upgrade to 3.1. It had a much better version of the formatting and partitioning tools. It also had a few updates to the user interface and the text to speech voice phonemes were updated.