DOS ain't dead

Using Dos for Real Time applications -> CLI (Developers)

posted by RayeR , CZ, 24.12.2012, 15:13

> Most likely it's the timer interrupt called every cca 18.2 ms (!!!) and
> eating more time than usual cca every 1 second.
>
> > Is this avoidable ?
>
>
> CLI
>

Yes the most of time can take BIOS/DOS interrupts. But even if you CLI, there will occur some SMM interrupts that are handled by SMI handler and cannot be disabled (this is transparrent and running behind all OS). BIOS writers should make this routines as fast as possible but it still may take some us or maybe tens of us? It also depends on hardware config and BIOS. If you need some microsecond precision timing I rather suggest to connect some external microcontroller to do this job.

---
DOS gives me freedom to unlimited HW access.

Complete thread:

• Using Dos for Real Time applications - Damien, 23.12.2012, 18:41 (Developers)
  • Using Dos for Real Time applications -> CLI - DOS386, 24.12.2012, 09:39
    • Using Dos for Real Time applications -> CLI - RayeR, 24.12.2012, 15:13
      • Using Dos for Real Time applications -> CLI - Damien, 26.12.2012, 12:50
      • Using Dos for Real Time applications -> CLI - Damien, 27.12.2012, 23:23
        • Using Dos for Real Time applications -> CLI - RayeR, 28.12.2012, 01:32
          • Using Dos for Real Time applications -> CLI - Damien, 02.01.2013, 13:20
            • Using Dos for Real Time applications -> CLI - Laaca, 02.01.2013, 21:02
              • Using Dos for Real Time applications -> CLI - RayeR, 02.01.2013, 23:22
              • Using Dos for Real Time applications -> CLI - Damien, 05.01.2013, 14:10
                • Using Dos for Real Time applications -> CLI - RayeR, 06.01.2013, 21:43
                  • Using Dos for Real Time applications -> CLI - Damien, 09.01.2013, 13:12
                    • Using Dos for Real Time applications -> CLI - RayeR, 09.01.2013, 13:52
                      • Using Dos for Real Time applications -> CLI - Arjay, 09.01.2013, 23:40