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Important: This document is part of the Legacy section of the ADC Reference Library. This information should not be used for new development.

Current information on this Reference Library topic can be found here:

What are NewWorld and Open Firmware version 3?

Q: What are NewWorld and Open Firmware version 3, and are they related?

A: NewWorld is a project to reduce the size of the 4MB Mac ROM by removing the Tool Box code contained in that ROM. For details see the iMac Developer Note.

Open Firmware version 3 is a part of that project. When the Tool Box was removed from the 4MB ROM, a portion of the booting logic was also removed. Open Firmware version 3 also provides for booting using FCode drivers. Version 3 first appeared on the iMac and is being used on all future platforms.

[Feb 15 1999]