High Memory Support Functions

The following OS/2 functions have been tested with the High Memory Support:

• DosFlatToSel
  
• DosGetNamedSharedMem
  
• DosGetSharedMem
  
• DosGiveSharedMem
  
• DosSetMem
  
• DosFreeMem
  
• DosRead
  
• DosWrite
  
• DosQueryMem
  
• DosQueryState
  
• DosQueryPageUsage
  
• DosSubSetMem
  
• DosSubAllocMem
  
• DosSubFreeMem
  
• DosSubUnsetMem
  
• All 32-bit semaphore functions
  
• All 32-bit exception handling functions

The maximum amount of free space in the high memory area can be determined from a program by using the DosQuerySysInfo function.

If a virtual address above the 512 MB line is passed to DosFlatToSel, a 0 is returned.

The following functions have been enhanced for High Memory Support: