This Technical Note formerly described a bug of SANE on the Apple IIGS which caused it to jump through location $00/0018 instead of through the HALT vector in the SANE direct page.
The bug which caused SANE on the Apple IIGS to jump through location $00/0018 instead of through the HALT vector in the SANE direct page was fixed in the Apple IIGS ROM 2.0. You should not have to write a special case to handle this bug since it is reasonable to expect users to have the updated ROM which is offered as a free upgrade from Apple.
This and all of the other Apple II Technical Notes have been converted to HTML by Aaron Heiss as a public service to the Apple II community, with permission by Apple Computer, Inc. Any and all trademarks, registered and otherwise, are properties of their owners.