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Important: The information in this document is obsolete and should not be used for new development.

Chapter 4 - Memory Management Utilities / Memory Management Utilities Reference

Routines / Changing the Addressing Mode

GetMMUMode
To find out which address-translation mode (24-bit or 32-bit) is currently in use, use the GetMMUMode function.
FUNCTION GetMMUMode: SignedByte;
DESCRIPTION
The GetMMUMode function returns the address-translation mode currently in use. On exit, GetMMUMode returns one of the following constants:
CONST
   false32b    = 0;              {24-bit addressing mode}
   true32b     = 1;              {32-bit addressing mode}
SPECIAL CONSIDERATIONS
To find out which addressing mode was in effect at system startup, use the Gestalt function.

ASSEMBLY-LANGUAGE INFORMATION
To determine the current address-translation mode, you can test the contents of the global variable MMU32Bit. The value TRUE indicates that 32-bit mode is in effect.