GETBASEIRQ EscapeCommFunction()

 Last reviewed: July 23, 1997
Article ID: Q112388
3.10 WINDOWS kbprg

The information in this article applies to:

  • Microsoft Windows Software Development Kit (SDK) for Windows version 3.1

SUMMARY

By calling EscapeCommFunction() with GETBASEIRQ as the nFunction parameter, an application can determine the base I/O port address and IRQ used for a specific communications port.

MORE INFORMATION

Although GETBASEIRQ is not documented in the Windows 3.1 SDK manuals, it is listed in the WINDOWS.H header file, and will continue to be supported in future versions of 16-bit Windows.

When calling EscapeCommFunction() with GETBASEIRQ, the value returned is a LONG. The HIWORD of the return value is the IRQ and the LOWORD is the base I/O address of the communications port.

Please note that this function call does not indicate whether a UART exists at the port; it only returns the I/O base and IRQ that COMM.DRV would use for that port.

Additional reference words: 3.10
KBCategory: kbprg
KBSubcategory: KrCommapi
Keywords : kb16bitonly

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Last reviewed: July 23, 1997
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