PC NTMMTA: No Limitations on Memory Management

 Last reviewed: October 24, 1995
Article ID: Q129952
The information in this article applies to:
  • Microsoft Mail Multitasking MTA for Windows NT, version 3.5

SUMMARY

The Mail Multitasking MTA (MMTA) for OS/2, running OS/2 version 1.3, is limited to 16 megabytes of memory. However, the MMTA running under Microsoft Windows NT can use all available memory on the Windows NT machine.

MORE INFORMATION

Some of the memory management limitations of OS/2 1.x are removed. The most important of these is the limit of 16 MB of physical RAM. The OS/2 subsystem uses the large memory capability of Windows NT. As a result, you get an increase in performance, and the applications can use the additional memory.

Protection Model

The OS/2 subsystem implements protection between OS/2 applications. It constructs their address spaces (both the flat address space and LDTs) and implements the same protection as in OS/2.

Segment Swapping

The OS/2 subsystem uses the Windows NT paging mechanism; no segment swapping is performed. Paging works better than segment swapping, and it exists in OS/2 only to support the 80286 processor, which is not supported in Windows NT.

Additional reference words: 3.20
KBCategory: kbenv kbtlc
KBSubcategory: MailPCNTMMTA

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Last reviewed: October 24, 1995
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