FFAPI: Memory Usage for MS-DOS Get and Put Executable Files

 Last reviewed: October 20, 1997
Article ID: Q115518
2.10 3.00 MS-DOS kb3rdparty

The information in this article applies to:

  • Microsoft Mail Gateway to FFAPI, versions 2.1 and 3.0

The Microsoft Mail File Format Application Programming Interface (FFAPI) runs in conventional memory. Since MS-DOS and network drivers also run in the same memory, sometimes you may not be able to load or run FFAPI.

FFAPI loads the following files into memory: 

   GLB\NETWORK.GLB
   XTN\*.XTN
   GLB\GROUP.GLB
   GLB\ACCESS2.GLB
As more postoffice users are added, memory available to process messages decreases.

MORE INFORMATION

Approximate memory usage breakdown:

  1. Locally defined users take 35 bytes each.

  2. Locally defined groups take 31 bytes each.

  3. Each local user defined as a remote call requesters take an additional 36 bytes each.

  4. Any gateway access component takes 90 bytes each.

  5. Directly defined and indirectly defined postoffices each take 100.5 bytes.

  6. Any of those defined postoffices that are connected by Modem or X.25 take an additional 48.6 bytes.

Additional reference words: 2.10 3.00
KBCategory: kb3rdparty
KBSubcategory: MailGWFFAPI

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Last reviewed: October 20, 1997
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