Topic       : TOS - The Operating System
Author      : 
Version     : tos.hyp (December 19, 2008)
Subject     : Programmieren/Atari
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Index Size  : 93790
HCP-Version : 5
Compiled on : Atari
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View Ref-File11.5.8  Semaphores in MagiC                                        TOS

Under MagiC, semaphores are released when the program (more exactly 
the application) terminates. In contrast to MiNT this applies also to 
the semaphores allocated with Psemaphore.

MagiC supports with Psemaphore only modes 2 and 3 at present, and 
recognizes the following system semaphores:

 Semaphore  Meaning

 _DMA       ACSI and FDC
            On receipt of these semaphores one must not forget to set 
            the system variable flock, and also to release this again 
            after the semaphore is released
 _NCR       SCSI of the Atari-TT
 _SCR       AES screen (used by wind_update)

See also: About the GEMDOS   Process functions   Signals