DOS ain't dead

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

posted by RayeR , CZ, 02.01.2013, 23:22

> I am not sure if it can help however you could try to disable all USB
> related things in the BIOS.
> Even if you don't have any USB drivers loaded, it still can do something in
> the background...

Yes, USB Legacy emulation is done in SMI mode and cannot be masked only disabled in SETUP. But I think it's not this case. USB needs much more fast handling than 1 per second or so. Newer computers are also more affected due to CPU and PM complexity - more SMI and ACPI stuff than in ancient age of PII/PIII.
Maybe disable ACPI could help too, just try...

BTW I remember I had same observation when playing MP3s with my covox LPT player. This is configured to play via timer interrupt that occurs at sample rate. On some PC you can hear little cliks during playback, maybe at rate 1 per sec I don't remember. It's probably the same issue that you have. I wanted to play with different timer ISR chaining but didn't find time yet...

---
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