ZX Spectrum Next User Manual, 3rd Edition, community edit (ISBN 978-1-5272-5496-1), written and illustrated by Phoebus R. Dokos. Copyright © 2020-2024 Phoebus Dokos / SpecNext Ltd. Licensed under CC BY-NC-SA 4.0. This is a transcription and can contain errors; check any doubt against the printed page.

This is a community edit of the 3rd Edition, with changes from the printed text. See page 306 of the 3rd Edition.