home *** CD-ROM | disk | FTP | other *** search
Text File | 1989-08-20 | 1.4 KB | 36 lines | [TEXT/pdos] |
- Apple II
- Technical Notes
- _____________________________________________________________________________
- Developer Technical Support
-
-
- Apple IIGS
- #55: Avoiding ClrHeartBeat
-
- Written by: Matt Deatherage July 1989
-
- This Technical Note lists changes to the description for ClrHeartBeat. This
- information supersedes the description in the Apple IIGS Toolbox Reference
- Manual.
- _____________________________________________________________________________
-
- The Apple IIGS Toolbox Reference Manual gives the following cautionary note in
- the description for the call ClrHeartBeat:
-
- "A desk accessory may have installed tasks in the Heartbeat
- Interrupt Task queue. If you make a ClrHeartBeat call, you will
- remove those tasks. Therefore, under normal circumstances you
- should not make this call."
-
- This isn't rude enough to get the point across to some people, so we'll try
- again:
-
- The Heartbeat Interrupt Task queue does not belong to the application.
- Different portions of System Software can, and will, install Heartbeat Tasks.
- If these tasks are removed, anything from a system crash to media corruption
- may result. Nothing but System Software should make this call.
-
-
- Further Reference
- _____________________________________________________________________________
- o Apple IIGS Toolbox Reference Manual