Major Feature Updates In Version 1.1

IMPORTANT

It should be noted that although the features listed here are supported by the version 1.1 USBPB parameter block, all Macintosh computers that support USB may not include the necessary ROM code to implement the features. Always check the USB gestalt selectors, defined in Isochronous Transfer Support and USB Software Presence and Version Attributes , rather than the version number to ensure that the features you are interested in are supported on the Macintosh your software is running on.