How to Maintain Time, Independent of CPU Speed

 Last reviewed: July 17, 1997
Article ID: Q12131
5.10 6.00 6.00a 6.00ax 7.00 7.00a | 1.00 1.50 
MS-DOS                            | WINDOWS
kbprg

The information in this article applies to:

  • Microsoft C for MS-DOS, versions 6.0, 6.0a, and 6.0ax
  • Microsoft C/C++ for MS-DOS, versions 7.0 and 7.0a
  • Microsoft Visual C++ for Windows, versions 1.0 and 1.5

To pause an application for a specific amount of time, independent of the CPU speed, create a routine that processes the timer tick interrupt. The frequency of timer ticks is the same all machines (approximately 18.2 per second when interrupts are enabled). The timer tick is Interrupt 1Ch.

Additional reference words: kbinf 1.00 1.50 6.00 6.00a 6.00ax 7.00 7.00a
KBCategory: kbprg
KBSubcategory: CLngIss
Keywords : kb16bitonly

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Last reviewed: July 17, 1997
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