Topic       : TOS - The Operating System
Author      : 
Version     : tos.hyp (December 19, 2008)
Subject     : Programmieren/Atari
Nodes       : 3010
Index Size  : 93790
HCP-Version : 5
Compiled on : Atari
@charset    : atarist
@lang       : 
@default    : Title
@help       : 
@options    : +g -i -s +x +zz -t4
@width      : 70
View Ref-File12.1.11.12  modeAtari                                              TOS

Before this function can be called the following conditions have to be 
fulfilled:

   . The Mac-mode must be active

   . The CPU must be in the supervisor-mode. Under virtual memory, Mac 
     programs and also the Mac interrupt routines run in user-mode. If 
     one wants to switch occasionally to the Atari-mode from there, 
     one has to change to the supervisor-mode beforehand. See 
     'EnterSupervisorMode'.

   . The current stack must lie in Atari address space, else the CPU 
     freezes immediately due to a double bus error if the program is 
     running on a 68k computer - because then other areas, including 
     the stack area, are no longer addressable. Please see also 
     minStackSize for this.

   . atariModePossible must indicate that MMU switching is permitted. 
     Otherwise, with MacsBug installed, the following message appears: 
     'Fatal Error: Atari-mode currently not available (MMU tables 
     invalid)'.

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